Stop exceptions in generator constructors from aborting the binary

Fixes #2615

src/catch2/generators/catch_generators.cpp

@@ -27,9 +27,16 @@ namespace Detail {
 
     GeneratorUntypedBase::~GeneratorUntypedBase() = default;
 
-    auto acquireGeneratorTracker(StringRef generatorName, SourceLineInfo const& lineInfo ) -> IGeneratorTracker& {
+    IGeneratorTracker* acquireGeneratorTracker(StringRef generatorName, SourceLineInfo const& lineInfo ) {
         return getResultCapture().acquireGeneratorTracker( generatorName, lineInfo );
     }
 
+    IGeneratorTracker* createGeneratorTracker( StringRef generatorName,
+                                 SourceLineInfo lineInfo,
+                                 GeneratorBasePtr&& generator ) {
+        return getResultCapture().createGeneratorTracker(
+            generatorName, lineInfo, CATCH_MOVE( generator ) );
+    }
+
 } // namespace Generators
 } // namespace Catch

src/catch2/generators/catch_generators.hpp

@@ -204,18 +204,28 @@ namespace Detail {
         return makeGenerators( value( T( CATCH_FORWARD( val ) ) ), CATCH_FORWARD( moreGenerators )... );
     }
 
-    auto acquireGeneratorTracker( StringRef generatorName, SourceLineInfo const& lineInfo ) -> IGeneratorTracker&;
+    IGeneratorTracker* acquireGeneratorTracker( StringRef generatorName,
+                                                SourceLineInfo const& lineInfo );
+    IGeneratorTracker* createGeneratorTracker( StringRef generatorName,
+                                               SourceLineInfo lineInfo,
+                                               GeneratorBasePtr&& generator );
 
     template<typename L>
     auto generate( StringRef generatorName, SourceLineInfo const& lineInfo, L const& generatorExpression ) -> typename decltype(generatorExpression())::type {
         using UnderlyingType = typename decltype(generatorExpression())::type;
 
-        IGeneratorTracker& tracker = acquireGeneratorTracker( generatorName, lineInfo );
+        IGeneratorTracker* tracker = acquireGeneratorTracker( generatorName, lineInfo );
-        if (!tracker.hasGenerator()) {
+        // Creation of tracker is delayed after generator creation, so
-            tracker.setGenerator(Catch::Detail::make_unique<Generators<UnderlyingType>>(generatorExpression()));
+        // that constructing generator can fail without breaking everything.
+        if (!tracker) {
+            tracker = createGeneratorTracker(
+                generatorName,
+                lineInfo,
+                Catch::Detail::make_unique<Generators<UnderlyingType>>(
+                    generatorExpression() ) );
         }
 
-        auto const& generator = static_cast<IGenerator<UnderlyingType> const&>( *tracker.getGenerator() );
+        auto const& generator = static_cast<IGenerator<UnderlyingType> const&>( *tracker->getGenerator() );
         return generator.get();
     }
 

src/catch2/interfaces/catch_interfaces_capture.hpp

@@ -13,6 +13,7 @@
 
 #include <catch2/internal/catch_stringref.hpp>
 #include <catch2/internal/catch_result_type.hpp>
+#include <catch2/internal/catch_unique_ptr.hpp>
 
 namespace Catch {
 
@@ -33,6 +34,12 @@ namespace Catch {
     template <typename Duration = std::chrono::duration<double, std::nano>>
     struct BenchmarkStats;
 
+    namespace Generators {
+        class GeneratorUntypedBase;
+        using GeneratorBasePtr = Catch::Detail::unique_ptr<GeneratorUntypedBase>;
+    }
+
+
     class IResultCapture {
     public:
         virtual ~IResultCapture();
@@ -42,7 +49,13 @@ namespace Catch {
         virtual void sectionEnded( SectionEndInfo const& endInfo ) = 0;
         virtual void sectionEndedEarly( SectionEndInfo const& endInfo ) = 0;
 
-        virtual auto acquireGeneratorTracker( StringRef generatorName, SourceLineInfo const& lineInfo ) -> IGeneratorTracker& = 0;
+        virtual IGeneratorTracker*
+        acquireGeneratorTracker( StringRef generatorName,
+                                 SourceLineInfo const& lineInfo ) = 0;
+        virtual IGeneratorTracker*
+        createGeneratorTracker( StringRef generatorName,
+                                SourceLineInfo lineInfo,
+                                Generators::GeneratorBasePtr&& generator ) = 0;
 
         virtual void benchmarkPreparing( StringRef name ) = 0;
         virtual void benchmarkStarting( BenchmarkInfo const& info ) = 0;

src/catch2/internal/catch_run_context.cpp

@@ -34,7 +34,7 @@ namespace Catch {
             {}
             ~GeneratorTracker() override;
 
-            static GeneratorTracker& acquire( TrackerContext& ctx, TestCaseTracking::NameAndLocation const& nameAndLocation ) {
+            static GeneratorTracker* acquire( TrackerContext& ctx, TestCaseTracking::NameAndLocation const& nameAndLocation ) {
                 GeneratorTracker* tracker;
 
                 ITracker& currentTracker = ctx.currentTracker();
@@ -61,18 +61,14 @@ namespace Catch {
                     assert( childTracker->isGeneratorTracker() );
                     tracker = static_cast<GeneratorTracker*>( childTracker );
                 } else {
-                    auto newTracker =
+                    return nullptr;
-                        Catch::Detail::make_unique<GeneratorTracker>(
-                            nameAndLocation, ctx, &currentTracker );
-                    tracker = newTracker.get();
-                    currentTracker.addChild( CATCH_MOVE(newTracker) );
                 }
 
                 if( !tracker->isComplete() ) {
                     tracker->open();
                 }
 
-                return *tracker;
+                return tracker;
             }
 
             // TrackerBase interface
@@ -141,6 +137,7 @@ namespace Catch {
                 // has a side-effect, where it consumes generator's current
                 // value, but we do not want to invoke the side-effect if
                 // this generator is still waiting for any child to start.
+                assert( m_generator && "Tracker without generator" );
                 if ( should_wait_for_child ||
                      ( m_runState == CompletedSuccessfully &&
                        m_generator->countedNext() ) ) {
@@ -314,14 +311,39 @@ namespace Catch {
 
         return true;
     }
-    auto RunContext::acquireGeneratorTracker( StringRef generatorName, SourceLineInfo const& lineInfo ) -> IGeneratorTracker& {
+    IGeneratorTracker*
+    RunContext::acquireGeneratorTracker( StringRef generatorName,
+                                         SourceLineInfo const& lineInfo ) {
         using namespace Generators;
-        GeneratorTracker& tracker = GeneratorTracker::acquire(m_trackerContext,
+        GeneratorTracker* tracker = GeneratorTracker::acquire(
-                                                              TestCaseTracking::NameAndLocation( static_cast<std::string>(generatorName), lineInfo ) );
+            m_trackerContext,
+            TestCaseTracking::NameAndLocation(
+                static_cast<std::string>( generatorName ), lineInfo ) );
         m_lastAssertionInfo.lineInfo = lineInfo;
         return tracker;
     }
 
+    IGeneratorTracker* RunContext::createGeneratorTracker(
+        StringRef generatorName,
+        SourceLineInfo lineInfo,
+        Generators::GeneratorBasePtr&& generator ) {
+
+        auto nameAndLoc = TestCaseTracking::NameAndLocation( static_cast<std::string>( generatorName ), lineInfo );
+        auto& currentTracker = m_trackerContext.currentTracker();
+        assert(
+            currentTracker.nameAndLocation() != nameAndLoc &&
+            "Trying to create tracker for a genreator that already has one" );
+
+        auto newTracker = Catch::Detail::make_unique<Generators::GeneratorTracker>(
+            nameAndLoc, m_trackerContext, &currentTracker );
+        auto ret = newTracker.get();
+        currentTracker.addChild( CATCH_MOVE( newTracker ) );
+
+        ret->setGenerator( CATCH_MOVE( generator ) );
+        ret->open();
+        return ret;
+    }
+
     bool RunContext::testForMissingAssertions(Counts& assertions) {
         if (assertions.total() != 0)
             return false;

src/catch2/internal/catch_run_context.hpp

@@ -73,7 +73,14 @@ namespace Catch {
         void sectionEnded( SectionEndInfo const& endInfo ) override;
         void sectionEndedEarly( SectionEndInfo const& endInfo ) override;
 
-        auto acquireGeneratorTracker( StringRef generatorName, SourceLineInfo const& lineInfo ) -> IGeneratorTracker& override;
+        IGeneratorTracker*
+        acquireGeneratorTracker( StringRef generatorName,
+                                 SourceLineInfo const& lineInfo ) override;
+        IGeneratorTracker* createGeneratorTracker(
+            StringRef generatorName,
+            SourceLineInfo lineInfo,
+            Generators::GeneratorBasePtr&& generator ) override;
+
 
         void benchmarkPreparing( StringRef name ) override;
         void benchmarkStarting( BenchmarkInfo const& info ) override;

src/catch2/internal/catch_test_case_tracker.hpp

@@ -27,6 +27,10 @@ namespace TestCaseTracking {
             return lhs.name == rhs.name
                 && lhs.location == rhs.location;
         }
+        friend bool operator!=(NameAndLocation const& lhs,
+                               NameAndLocation const& rhs) {
+            return !( lhs == rhs );
+        }
     };
 
     class ITracker;

tests/SelfTest/Baselines/automake.sw.approved.txt

@@ -25,6 +25,7 @@ Nor would this
 :test-result: PASS #1954 - 7 arg template test case sig compiles - 5, 3, 1, 1, 1, 0, 0
 :test-result: PASS #2152 - ULP checks between differently signed values were wrong - double
 :test-result: PASS #2152 - ULP checks between differently signed values were wrong - float
+:test-result: XFAIL #2615 - Throwing in constructor generator fails test case but does not abort
 :test-result: XFAIL #748 - captures with unexpected exceptions
 :test-result: PASS #809
 :test-result: PASS #833

tests/SelfTest/Baselines/automake.sw.multi.approved.txt

@@ -23,6 +23,7 @@
 :test-result: PASS #1954 - 7 arg template test case sig compiles - 5, 3, 1, 1, 1, 0, 0
 :test-result: PASS #2152 - ULP checks between differently signed values were wrong - double
 :test-result: PASS #2152 - ULP checks between differently signed values were wrong - float
+:test-result: XFAIL #2615 - Throwing in constructor generator fails test case but does not abort
 :test-result: XFAIL #748 - captures with unexpected exceptions
 :test-result: PASS #809
 :test-result: PASS #833

tests/SelfTest/Baselines/compact.sw.approved.txt

@@ -84,6 +84,7 @@ Matchers.tests.cpp:<line number>: passed: smallest_non_zero, WithinULP( -smalles
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0 not is within 1 ULPs of -4.9406564584124654e-324 ([-9.8813129168249309e-324, -0.0000000000000000e+00])
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, WithinULP( -smallest_non_zero, 2 ) for: 0.0f is within 2 ULPs of -1.40129846e-45f ([-4.20389539e-45, 1.40129846e-45])
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.00000000e+00])
+Generators.tests.cpp:<line number>: failed: unexpected exception with message: 'failure to init'
 Exception.tests.cpp:<line number>: failed: unexpected exception with message: 'answer := 42' with 1 message: 'expected exception'
 Exception.tests.cpp:<line number>: failed: unexpected exception with message: 'answer := 42'; expression was: thisThrows() with 1 message: 'expected exception'
 Exception.tests.cpp:<line number>: passed: thisThrows() with 1 message: 'answer := 42'
@@ -2521,7 +2522,7 @@ InternalBenchmark.tests.cpp:<line number>: passed: med == 18. for: 18.0 == 18.0
 InternalBenchmark.tests.cpp:<line number>: passed: q3 == 23. for: 23.0 == 23.0
 Misc.tests.cpp:<line number>: passed:
 Misc.tests.cpp:<line number>: passed:
-test cases:  407 |  308 passed |  84 failed | 5 skipped | 10 failed as expected
+test cases:  408 |  308 passed |  84 failed | 5 skipped | 11 failed as expected
-assertions: 2209 | 2033 passed | 145 failed | 31 failed as expected
+assertions: 2210 | 2033 passed | 145 failed | 32 failed as expected
 
 

tests/SelfTest/Baselines/compact.sw.multi.approved.txt

@@ -82,6 +82,7 @@ Matchers.tests.cpp:<line number>: passed: smallest_non_zero, WithinULP( -smalles
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0 not is within 1 ULPs of -4.9406564584124654e-324 ([-9.8813129168249309e-324, -0.0000000000000000e+00])
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, WithinULP( -smallest_non_zero, 2 ) for: 0.0f is within 2 ULPs of -1.40129846e-45f ([-4.20389539e-45, 1.40129846e-45])
 Matchers.tests.cpp:<line number>: passed: smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.00000000e+00])
+Generators.tests.cpp:<line number>: failed: unexpected exception with message: 'failure to init'
 Exception.tests.cpp:<line number>: failed: unexpected exception with message: 'answer := 42' with 1 message: 'expected exception'
 Exception.tests.cpp:<line number>: failed: unexpected exception with message: 'answer := 42'; expression was: thisThrows() with 1 message: 'expected exception'
 Exception.tests.cpp:<line number>: passed: thisThrows() with 1 message: 'answer := 42'
@@ -2510,7 +2511,7 @@ InternalBenchmark.tests.cpp:<line number>: passed: med == 18. for: 18.0 == 18.0
 InternalBenchmark.tests.cpp:<line number>: passed: q3 == 23. for: 23.0 == 23.0
 Misc.tests.cpp:<line number>: passed:
 Misc.tests.cpp:<line number>: passed:
-test cases:  407 |  308 passed |  84 failed | 5 skipped | 10 failed as expected
+test cases:  408 |  308 passed |  84 failed | 5 skipped | 11 failed as expected
-assertions: 2209 | 2033 passed | 145 failed | 31 failed as expected
+assertions: 2210 | 2033 passed | 145 failed | 32 failed as expected
 
 

tests/SelfTest/Baselines/console.std.approved.txt

@@ -27,6 +27,16 @@ Tricky.tests.cpp:<line number>: FAILED:
 explicitly with message:
   1514
 
+-------------------------------------------------------------------------------
+#2615 - Throwing in constructor generator fails test case but does not abort
+-------------------------------------------------------------------------------
+Generators.tests.cpp:<line number>
+...............................................................................
+
+Generators.tests.cpp:<line number>: FAILED:
+due to unexpected exception with message:
+  failure to init
+
 -------------------------------------------------------------------------------
 #748 - captures with unexpected exceptions
   outside assertions
@@ -1523,6 +1533,6 @@ due to unexpected exception with message:
   Why would you throw a std::string?
 
 ===============================================================================
-test cases:  407 |  322 passed |  69 failed | 6 skipped | 10 failed as expected
+test cases:  408 |  322 passed |  69 failed | 6 skipped | 11 failed as expected
-assertions: 2192 | 2033 passed | 128 failed | 31 failed as expected
+assertions: 2193 | 2033 passed | 128 failed | 32 failed as expected
 

tests/SelfTest/Baselines/console.sw.approved.txt

@@ -761,6 +761,16 @@ with expansion:
   0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.
   00000000e+00])
 
+-------------------------------------------------------------------------------
+#2615 - Throwing in constructor generator fails test case but does not abort
+-------------------------------------------------------------------------------
+Generators.tests.cpp:<line number>
+...............................................................................
+
+Generators.tests.cpp:<line number>: FAILED:
+due to unexpected exception with message:
+  failure to init
+
 -------------------------------------------------------------------------------
 #748 - captures with unexpected exceptions
   outside assertions
@@ -18093,6 +18103,6 @@ Misc.tests.cpp:<line number>
 Misc.tests.cpp:<line number>: PASSED:
 
 ===============================================================================
-test cases:  407 |  308 passed |  84 failed | 5 skipped | 10 failed as expected
+test cases:  408 |  308 passed |  84 failed | 5 skipped | 11 failed as expected
-assertions: 2209 | 2033 passed | 145 failed | 31 failed as expected
+assertions: 2210 | 2033 passed | 145 failed | 32 failed as expected
 

tests/SelfTest/Baselines/console.sw.multi.approved.txt

@@ -759,6 +759,16 @@ with expansion:
   0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.
   00000000e+00])
 
+-------------------------------------------------------------------------------
+#2615 - Throwing in constructor generator fails test case but does not abort
+-------------------------------------------------------------------------------
+Generators.tests.cpp:<line number>
+...............................................................................
+
+Generators.tests.cpp:<line number>: FAILED:
+due to unexpected exception with message:
+  failure to init
+
 -------------------------------------------------------------------------------
 #748 - captures with unexpected exceptions
   outside assertions
@@ -18082,6 +18092,6 @@ Misc.tests.cpp:<line number>
 Misc.tests.cpp:<line number>: PASSED:
 
 ===============================================================================
-test cases:  407 |  308 passed |  84 failed | 5 skipped | 10 failed as expected
+test cases:  408 |  308 passed |  84 failed | 5 skipped | 11 failed as expected
-assertions: 2209 | 2033 passed | 145 failed | 31 failed as expected
+assertions: 2210 | 2033 passed | 145 failed | 32 failed as expected
 

tests/SelfTest/Baselines/console.swa4.approved.txt

@@ -761,6 +761,16 @@ with expansion:
   0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.
   00000000e+00])
 
+-------------------------------------------------------------------------------
+#2615 - Throwing in constructor generator fails test case but does not abort
+-------------------------------------------------------------------------------
+Generators.tests.cpp:<line number>
+...............................................................................
+
+Generators.tests.cpp:<line number>: FAILED:
+due to unexpected exception with message:
+  failure to init
+
 -------------------------------------------------------------------------------
 #748 - captures with unexpected exceptions
   outside assertions
@@ -941,6 +951,6 @@ Condition.tests.cpp:<line number>: FAILED:
   CHECK( true != true )
 
 ===============================================================================
-test cases:  32 | 27 passed | 3 failed | 2 failed as expected
+test cases:  33 | 27 passed | 3 failed | 3 failed as expected
-assertions: 101 | 94 passed | 4 failed | 3 failed as expected
+assertions: 102 | 94 passed | 4 failed | 4 failed as expected
 

tests/SelfTest/Baselines/junit.sw.approved.txt

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuitesloose text artifact
 >
-  <testsuite name="<exe-name>" errors="17" failures="128" skipped="11" tests="2220" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="128" skipped="11" tests="2221" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <properties>
       <property name="random-seed" value="1"/>
       <property name="filters" value="&quot;*&quot; ~[!nonportable] ~[!benchmark] ~[approvals]"/>
@@ -48,6 +48,14 @@ Nor would this
     <testcase classname="<exe-name>.global" name="#1954 - 7 arg template test case sig compiles - 5, 3, 1, 1, 1, 0, 0" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="#2152 - ULP checks between differently signed values were wrong - double" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="#2152 - ULP checks between differently signed values were wrong - float" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="#2615 - Throwing in constructor generator fails test case but does not abort" time="{duration}" status="run">
+      <skipped message="TEST_CASE tagged with !mayfail"/>
+      <error type="TEST_CASE">
+FAILED:
+failure to init
+at Generators.tests.cpp:<line number>
+      </error>
+    </testcase>
     <testcase classname="<exe-name>.global" name="#748 - captures with unexpected exceptions/outside assertions" time="{duration}" status="run">
       <skipped message="TEST_CASE tagged with !mayfail"/>
       <error type="TEST_CASE">

tests/SelfTest/Baselines/junit.sw.multi.approved.txt

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuites>
-  <testsuite name="<exe-name>" errors="17" failures="128" skipped="11" tests="2220" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="128" skipped="11" tests="2221" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <properties>
       <property name="random-seed" value="1"/>
       <property name="filters" value="&quot;*&quot; ~[!nonportable] ~[!benchmark] ~[approvals]"/>
@@ -47,6 +47,14 @@ Nor would this
     <testcase classname="<exe-name>.global" name="#1954 - 7 arg template test case sig compiles - 5, 3, 1, 1, 1, 0, 0" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="#2152 - ULP checks between differently signed values were wrong - double" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="#2152 - ULP checks between differently signed values were wrong - float" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="#2615 - Throwing in constructor generator fails test case but does not abort" time="{duration}" status="run">
+      <skipped message="TEST_CASE tagged with !mayfail"/>
+      <error type="TEST_CASE">
+FAILED:
+failure to init
+at Generators.tests.cpp:<line number>
+      </error>
+    </testcase>
     <testcase classname="<exe-name>.global" name="#748 - captures with unexpected exceptions/outside assertions" time="{duration}" status="run">
       <skipped message="TEST_CASE tagged with !mayfail"/>
       <error type="TEST_CASE">

tests/SelfTest/Baselines/sonarqube.sw.approved.txt

@@ -1027,6 +1027,13 @@ at Exception.tests.cpp:<line number>
   <file path="tests/<exe-name>/UsageTests/Generators.tests.cpp">
     <testCase name="#1913 - GENERATE inside a for loop should not keep recreating the generator" duration="{duration}"/>
     <testCase name="#1913 - GENERATEs can share a line" duration="{duration}"/>
+    <testCase name="#2615 - Throwing in constructor generator fails test case but does not abort" duration="{duration}">
+      <skipped message="TEST_CASE()">
+FAILED:
+failure to init
+at Generators.tests.cpp:<line number>
+      </skipped>
+    </testCase>
     <testCase name="3x3x3 ints" duration="{duration}"/>
     <testCase name="Copy and then generate a range/from var and iterators" duration="{duration}"/>
     <testCase name="Copy and then generate a range/From a temporary container" duration="{duration}"/>

tests/SelfTest/Baselines/sonarqube.sw.multi.approved.txt

@@ -1026,6 +1026,13 @@ at Exception.tests.cpp:<line number>
   <file path="tests/<exe-name>/UsageTests/Generators.tests.cpp">
     <testCase name="#1913 - GENERATE inside a for loop should not keep recreating the generator" duration="{duration}"/>
     <testCase name="#1913 - GENERATEs can share a line" duration="{duration}"/>
+    <testCase name="#2615 - Throwing in constructor generator fails test case but does not abort" duration="{duration}">
+      <skipped message="TEST_CASE()">
+FAILED:
+failure to init
+at Generators.tests.cpp:<line number>
+      </skipped>
+    </testCase>
     <testCase name="3x3x3 ints" duration="{duration}"/>
     <testCase name="Copy and then generate a range/from var and iterators" duration="{duration}"/>
     <testCase name="Copy and then generate a range/From a temporary container" duration="{duration}"/>

tests/SelfTest/Baselines/tap.sw.approved.txt

@@ -164,6 +164,8 @@ ok {test-number} - smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0
 ok {test-number} - smallest_non_zero, WithinULP( -smallest_non_zero, 2 ) for: 0.0f is within 2 ULPs of -1.40129846e-45f ([-4.20389539e-45, 1.40129846e-45])
 # #2152 - ULP checks between differently signed values were wrong - float
 ok {test-number} - smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.00000000e+00])
+# #2615 - Throwing in constructor generator fails test case but does not abort
+not ok {test-number} - unexpected exception with message: 'failure to init'
 # #748 - captures with unexpected exceptions
 not ok {test-number} - unexpected exception with message: 'answer := 42' with 1 message: 'expected exception'
 # #748 - captures with unexpected exceptions
@@ -4443,5 +4445,5 @@ ok {test-number} - q3 == 23. for: 23.0 == 23.0
 ok {test-number} -
 # xmlentitycheck
 ok {test-number} -
-1..2220
+1..2221
 

tests/SelfTest/Baselines/tap.sw.multi.approved.txt

@@ -162,6 +162,8 @@ ok {test-number} - smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0
 ok {test-number} - smallest_non_zero, WithinULP( -smallest_non_zero, 2 ) for: 0.0f is within 2 ULPs of -1.40129846e-45f ([-4.20389539e-45, 1.40129846e-45])
 # #2152 - ULP checks between differently signed values were wrong - float
 ok {test-number} - smallest_non_zero, !WithinULP( -smallest_non_zero, 1 ) for: 0.0f not is within 1 ULPs of -1.40129846e-45f ([-2.80259693e-45, -0.00000000e+00])
+# #2615 - Throwing in constructor generator fails test case but does not abort
+not ok {test-number} - unexpected exception with message: 'failure to init'
 # #748 - captures with unexpected exceptions
 not ok {test-number} - unexpected exception with message: 'answer := 42' with 1 message: 'expected exception'
 # #748 - captures with unexpected exceptions
@@ -4432,5 +4434,5 @@ ok {test-number} - q3 == 23. for: 23.0 == 23.0
 ok {test-number} -
 # xmlentitycheck
 ok {test-number} -
-1..2220
+1..2221
 

tests/SelfTest/Baselines/teamcity.sw.approved.txt

@@ -52,6 +52,9 @@
 ##teamcity[testFinished name='#2152 - ULP checks between differently signed values were wrong - double' duration="{duration}"]
 ##teamcity[testStarted name='#2152 - ULP checks between differently signed values were wrong - float']
 ##teamcity[testFinished name='#2152 - ULP checks between differently signed values were wrong - float' duration="{duration}"]
+##teamcity[testStarted name='#2615 - Throwing in constructor generator fails test case but does not abort']
+##teamcity[testIgnored name='#2615 - Throwing in constructor generator fails test case but does not abort' message='Generators.tests.cpp:<line number>|n...............................................................................|n|nGenerators.tests.cpp:<line number>|nunexpected exception with message:|n  "failure to init"- failure ignore as test marked as |'ok to fail|'|n']
+##teamcity[testFinished name='#2615 - Throwing in constructor generator fails test case but does not abort' duration="{duration}"]
 ##teamcity[testStarted name='#748 - captures with unexpected exceptions']
 ##teamcity[testIgnored name='#748 - captures with unexpected exceptions' message='-------------------------------------------------------------------------------|noutside assertions|n-------------------------------------------------------------------------------|nException.tests.cpp:<line number>|n...............................................................................|n|nException.tests.cpp:<line number>|nunexpected exception with messages:|n  "answer := 42"|n  "expected exception"- failure ignore as test marked as |'ok to fail|'|n']
 ##teamcity[testIgnored name='#748 - captures with unexpected exceptions' message='-------------------------------------------------------------------------------|ninside REQUIRE_NOTHROW|n-------------------------------------------------------------------------------|nException.tests.cpp:<line number>|n...............................................................................|n|nException.tests.cpp:<line number>|nunexpected exception with messages:|n  "answer := 42"|n  "expected exception"|n  REQUIRE_NOTHROW( thisThrows() )|nwith expansion:|n  thisThrows()|n- failure ignore as test marked as |'ok to fail|'|n']

tests/SelfTest/Baselines/teamcity.sw.multi.approved.txt

@@ -52,6 +52,9 @@
 ##teamcity[testFinished name='#2152 - ULP checks between differently signed values were wrong - double' duration="{duration}"]
 ##teamcity[testStarted name='#2152 - ULP checks between differently signed values were wrong - float']
 ##teamcity[testFinished name='#2152 - ULP checks between differently signed values were wrong - float' duration="{duration}"]
+##teamcity[testStarted name='#2615 - Throwing in constructor generator fails test case but does not abort']
+##teamcity[testIgnored name='#2615 - Throwing in constructor generator fails test case but does not abort' message='Generators.tests.cpp:<line number>|n...............................................................................|n|nGenerators.tests.cpp:<line number>|nunexpected exception with message:|n  "failure to init"- failure ignore as test marked as |'ok to fail|'|n']
+##teamcity[testFinished name='#2615 - Throwing in constructor generator fails test case but does not abort' duration="{duration}"]
 ##teamcity[testStarted name='#748 - captures with unexpected exceptions']
 ##teamcity[testIgnored name='#748 - captures with unexpected exceptions' message='-------------------------------------------------------------------------------|noutside assertions|n-------------------------------------------------------------------------------|nException.tests.cpp:<line number>|n...............................................................................|n|nException.tests.cpp:<line number>|nunexpected exception with messages:|n  "answer := 42"|n  "expected exception"- failure ignore as test marked as |'ok to fail|'|n']
 ##teamcity[testIgnored name='#748 - captures with unexpected exceptions' message='-------------------------------------------------------------------------------|ninside REQUIRE_NOTHROW|n-------------------------------------------------------------------------------|nException.tests.cpp:<line number>|n...............................................................................|n|nException.tests.cpp:<line number>|nunexpected exception with messages:|n  "answer := 42"|n  "expected exception"|n  REQUIRE_NOTHROW( thisThrows() )|nwith expansion:|n  thisThrows()|n- failure ignore as test marked as |'ok to fail|'|n']

tests/SelfTest/Baselines/xml.sw.approved.txt

@@ -667,6 +667,12 @@ Nor would this
     </Expression>
     <OverallResult success="true" skips="0"/>
   </TestCase>
+  <TestCase name="#2615 - Throwing in constructor generator fails test case but does not abort" tags="[!shouldfail]" filename="tests/<exe-name>/UsageTests/Generators.tests.cpp" >
+    <Exception filename="tests/<exe-name>/UsageTests/Generators.tests.cpp" >
+      failure to init
+    </Exception>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
   <TestCase name="#748 - captures with unexpected exceptions" tags="[!shouldfail][!throws][.][failing]" filename="tests/<exe-name>/UsageTests/Exception.tests.cpp" >
     <Section name="outside assertions" filename="tests/<exe-name>/UsageTests/Exception.tests.cpp" >
       <Info>
@@ -21042,6 +21048,6 @@ b1!
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
-  <OverallResults successes="2033" failures="145" expectedFailures="31" skips="11"/>
+  <OverallResults successes="2033" failures="145" expectedFailures="32" skips="11"/>
-  <OverallResultsCases successes="308" failures="84" expectedFailures="10" skips="5"/>
+  <OverallResultsCases successes="308" failures="84" expectedFailures="11" skips="5"/>
 </Catch2TestRun>

tests/SelfTest/Baselines/xml.sw.multi.approved.txt

@@ -667,6 +667,12 @@ Nor would this
     </Expression>
     <OverallResult success="true" skips="0"/>
   </TestCase>
+  <TestCase name="#2615 - Throwing in constructor generator fails test case but does not abort" tags="[!shouldfail]" filename="tests/<exe-name>/UsageTests/Generators.tests.cpp" >
+    <Exception filename="tests/<exe-name>/UsageTests/Generators.tests.cpp" >
+      failure to init
+    </Exception>
+    <OverallResult success="true" skips="0"/>
+  </TestCase>
   <TestCase name="#748 - captures with unexpected exceptions" tags="[!shouldfail][!throws][.][failing]" filename="tests/<exe-name>/UsageTests/Exception.tests.cpp" >
     <Section name="outside assertions" filename="tests/<exe-name>/UsageTests/Exception.tests.cpp" >
       <Info>
@@ -21041,6 +21047,6 @@ b1!
     </Section>
     <OverallResult success="true" skips="0"/>
   </TestCase>
-  <OverallResults successes="2033" failures="145" expectedFailures="31" skips="11"/>
+  <OverallResults successes="2033" failures="145" expectedFailures="32" skips="11"/>
-  <OverallResultsCases successes="308" failures="84" expectedFailures="10" skips="5"/>
+  <OverallResultsCases successes="308" failures="84" expectedFailures="11" skips="5"/>
 </Catch2TestRun>

tests/SelfTest/UsageTests/Generators.tests.cpp

@@ -277,6 +277,37 @@ TEST_CASE("#1913 - GENERATEs can share a line", "[regression][generators]") {
     REQUIRE(i != j);
 }
 
+namespace {
+    class test_generator : public Catch::Generators::IGenerator<int> {
+    public:
+        [[noreturn]] explicit test_generator() {
+            // removing the following line will cause the program to terminate
+            // gracefully.
+            throw Catch::GeneratorException( "failure to init" );
+        }
+
+        auto get() const -> int const& override {
+            static constexpr int value = 1;
+            return value;
+        }
+
+        auto next() -> bool override { return false; }
+    };
+
+    static auto make_test_generator()
+        -> Catch::Generators::GeneratorWrapper<int> {
+        return { new test_generator() };
+    }
+
+} // namespace
+
+TEST_CASE( "#2615 - Throwing in constructor generator fails test case but does not abort", "[!shouldfail]" ) {
+    // this should fail the test case, but not abort the application
+    auto sample = GENERATE( make_test_generator() );
+    // this assertion shouldn't trigger
+    REQUIRE( sample == 0U );
+}
+
 #if defined( __clang__ )
 #    pragma clang diagnostic pop
 #endif