[llvm] [SimplifyCFG] Do not redirect potential poison values from predecessors to PHI (PR #189966)

Wed Apr 1 07:45:20 PDT 2026

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 138669 tests passed
* 2575 tests skipped

All executed tests passed, but another part of the build **failed**. Click on a failure below to see the details.

<details>
<summary>flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o</summary>

```
FAILED: flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DLIBC_NAMESPACE=__llvm_libc_common_utils -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_NO_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/../flang/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/flang-rt -I/home/gha/actions-runner/_work/llvm-project/llvm-project/cmake/Modules/../../libc -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -std=gnu++17 -UNDEBUG -fno-lto -fno-exceptions -fno-rtti -funwind-tables -fno-asynchronous-unwind-tables -include/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/stl-overrides.h -Wp,-U_GLIBCXX_ASSERTIONS -Wp,-U_LIBCPP_ENABLE_ASSERTIONS -MD -MT flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o -MF flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o.d -o flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/io-stmt.cpp
clang++: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/Instructions.h:2876: Value *llvm::PHINode::getOperand(unsigned int) const: Assertion `i_nocapture < OperandTraits<PHINode>::operands(this) && "getOperand() out of range!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DLIBC_NAMESPACE=__llvm_libc_common_utils -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_NO_ASSERTIONS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/../flang/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/flang-rt -I/home/gha/actions-runner/_work/llvm-project/llvm-project/cmake/Modules/../../libc -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -std=gnu++17 -UNDEBUG -fno-lto -fno-exceptions -fno-rtti -funwind-tables -fno-asynchronous-unwind-tables -include/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/stl-overrides.h -Wp,-U_GLIBCXX_ASSERTIONS -Wp,-U_LIBCPP_ENABLE_ASSERTIONS -MD -MT flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o -MF flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o.d -o flang-rt/lib/runtime/CMakeFiles/flang_rt.runtime.static.dir/io-stmt.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/io-stmt.cpp
1.	<eof> parser at end of file
2.	Optimizer
3.	Running pass "require<globals-aa>,function(invalidate<aa>),require<profile-summary>,cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,argpromotion,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto;no-check-exit-count>,licm<allowspeculation>,simple-loop-unswitch<nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,extra-simple-loop-unswitch-passes,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide)),function(invalidate<should-not-run-function-passes>),cgscc(devirt<4>())" on module "/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/io-stmt.cpp"
4.	Running pass "cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,argpromotion,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto;no-check-exit-count>,licm<allowspeculation>,simple-loop-unswitch<nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,extra-simple-loop-unswitch-passes,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide))" on module "/home/gha/actions-runner/_work/llvm-project/llvm-project/flang-rt/lib/runtime/io-stmt.cpp"
5.	Running pass "instcombine<max-iterations=1;no-verify-fixpoint>" on function "_ZN7Fortran7runtime2io16IoStatementState11NextInFieldERSt8optionalIiERKNS1_8DataEditEPNS2_14FastAsciiFieldE"
#0 0x00000000092e9198 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:880:13
#1 0x00000000092e6101 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:109:18
#2 0x00000000092e7d8c llvm::sys::CleanupOnSignal(unsigned long) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
#3 0x00000000092460a6 HandleCrash /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
#4 0x00000000092460a6 CrashRecoverySignalHandler(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:393:51
#5 0x00007d299d228330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#6 0x00007d299d281b2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#7 0x00007d299d22827e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#8 0x00007d299d20b8ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#9 0x00007d299d20b81b (/lib/x86_64-linux-gnu/libc.so.6+0x2881b)
#10 0x00007d299d21e517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#11 0x0000000008f5fce5 getNodeBaseParent /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/ilist_node_base.h:55:49
#12 0x0000000008f5fce5 getParent /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/ilist_node.h:38:41
#13 0x0000000008f5fce5 llvm::InstCombinerImpl::visitPHINode(llvm::PHINode&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp:1611:34
#14 0x0000000008e895da llvm::InstCombinerImpl::run() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp:5892:22
#15 0x0000000008e8ce90 combineInstructionsOverFunction(llvm::Function&, llvm::InstructionWorklist&, llvm::AAResults*, llvm::AssumptionCache&, llvm::TargetLibraryInfo&, llvm::TargetTransformInfo&, llvm::DominatorTree&, llvm::OptimizationRemarkEmitter&, llvm::BlockFrequencyInfo*, llvm::BranchProbabilityInfo*, llvm::ProfileSummaryInfo*, llvm::InstCombineOptions const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp:6205:31
#16 0x0000000008e8c1e6 llvm::InstCombinePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp:6267:8
#17 0x0000000008c9f2d7 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#18 0x0000000008205eca llvm::CGSCCToFunctionPassAdaptor::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Analysis/CGSCCPassManager.cpp:0:38
#19 0x00000000082014d3 llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Analysis/CGSCCPassManager.cpp:97:12
#20 0x000000000820440e llvm::DevirtSCCRepeatedPass::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Analysis/CGSCCPassManager.cpp:0:38
#21 0x0000000008202b8e llvm::ModuleToPostOrderCGSCCPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Analysis/CGSCCPassManager.cpp:284:18
#22 0x0000000008c9e3a7 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#23 0x000000000a6d3918 ~SmallPtrSetImplBase /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallPtrSet.h:89:9
#24 0x000000000a6d3918 ~PreservedAnalyses /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/Analysis.h:112:7
#25 0x000000000a6d3918 llvm::ModuleInlinerWrapperPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/IPO/Inliner.cpp:619:3
#26 0x0000000008c9e3a7 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#27 0x0000000009c27f06 ~SmallPtrSetImplBase /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallPtrSet.h:89:9
#28 0x0000000009c27f06 ~PreservedAnalyses /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/Analysis.h:112:7
#29 0x0000000009c27f06 (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1209:5
#30 0x0000000009c1d2f8 emitAssembly /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1291:23
#31 0x0000000009c1d2f8 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1475:13
#32 0x0000000009c33f24 ~unique_ptr /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/unique_ptr.h:403:6
#33 0x0000000009c33f24 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:312:3
#34 0x000000000b8e6229 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_iterator.h:1077:20
#35 0x000000000b8e6229 begin /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_vector.h:874:16
#36 0x000000000b8e6229 finalize<std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> >, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> > > > > /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#37 0x000000000b8e6229 clang::ParseAST(clang::Sema&, bool, bool) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Parse/ParseAST.cpp:190:3
#38 0x000000000a19d8d6 clang::FrontendAction::Execute() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1346:10
#39 0x000000000a0fdc9d getPtr /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:278:42
#40 0x000000000a0fdc9d operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:241:16
#41 0x000000000a0fdc9d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:989:23
#42 0x000000000a295668 get /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/shared_ptr_base.h:1666:16
#43 0x000000000a295668 _M_get /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/shared_ptr_base.h:1363:66
#44 0x000000000a295668 operator-> /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/shared_ptr_base.h:1357:9
#45 0x000000000a295668 getFrontendOpts /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/include/clang/Frontend/CompilerInstance.h:310:12
#46 0x000000000a295668 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:319:14
#47 0x000000000646a595 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/cc1_main.cpp:302:15
#48 0x0000000006466375 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:229:12
#49 0x000000000646892d operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:0:12
#50 0x000000000646892d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::$_0>(long, llvm::SmallVectorImpl<char const*>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#51 0x0000000009f47809 operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:30
#52 0x0000000009f47809 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0>(long) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#53 0x0000000009245dbe operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12
#54 0x0000000009245dbe llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:437:3
#55 0x0000000009f46ecc clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:7
#56 0x0000000009f043fc clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
#57 0x0000000009f04617 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:246:13
#58 0x0000000009f216f8 empty /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallVector.h:83:46
#59 0x0000000009f216f8 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Driver.cpp:2328:23
#60 0x0000000006465b69 clang_main(int, char**, llvm::ToolContext const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:419:21
#61 0x00000000064768cd main /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/tools/driver/clang-driver.cpp:17:10
#62 0x00007d299d20d1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#63 0x00007d299d20d28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#64 0x0000000006463ce5 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang+++0x6463ce5)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 23.0.0git (https://github.com/llvm/llvm-project 706248cdcb64c5966bdf5677d7647b7d5a42bde4)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin
Build config: +assertions
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/io-stmt-952c1e.cpp
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/io-stmt-952c1e.sh
clang++: note: diagnostic msg:

********************
Aborted
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/189966