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clang::InitListExpr::getInit(unsigned int): Assertion `Init < getNumInits() && "Initializer access out of range!"' failed. #198767

Closed as duplicate of#106180
Bug
#192471
Closed as duplicate of#106180
clang::InitListExpr::getInit(unsigned int): Assertion `Init < getNumInits() && "Initializer access out of range!"' failed.#198767
Bug
#192471
Labels
clangClang issues not falling into any other categoryconfirmedVerified by a second partyregression:17Regression in 17 release

Description

@zeng1313
zeng1313
opened on May 20, 2026

Compiler Explorer: https://godbolt.org/z/Wqfz8vM5b

code:

int main() {
  static __thread static FILE *file = 0;
  static __thread static char buffer[128] = {{{},0}};
  return 0;
}
<source>:2:19: warning: duplicate 'static' declaration specifier [-Wduplicate-decl-specifier]
    2 |   static __thread static FILE *file = 0;
      |                   ^~~~~~
<source>:2:26: error: unknown type name 'FILE'
    2 |   static __thread static FILE *file = 0;
      |                          ^
<source>:3:19: warning: duplicate 'static' declaration specifier [-Wduplicate-decl-specifier]
    3 |   static __thread static char buffer[128] = {{{},0}};
      |                   ^~~~~~
<source>:3:47: warning: too many braces around scalar initializer [-Wmany-braces-around-scalar-init]
    3 |   static __thread static char buffer[128] = {{{},0}};
      |                                               ^~
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: /opt/compiler-explorer/clang-trunk/bin/clang -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fverbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -O3 -Wall -Wextra <source>
1.	<source>:3:53: current parser token ';'
2.	<source>:1:12: parsing function body 'main'
3.	<source>:1:12: in compound statement ('{}')
 #0 0x0000000003ee30a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ee30a8)
 #1 0x0000000003ee0a8c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ee0a8c)
 #2 0x0000000003e209a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007bf99e242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000000006ca57d7 (anonymous namespace)::InitListChecker::CheckExplicitInitList(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, clang::InitListExpr*, bool) (.constprop.0) SemaInit.cpp:0:0
 #5 0x0000000006ca5c57 (anonymous namespace)::InitListChecker::InitListChecker(clang::Sema&, clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, bool, bool, llvm::SmallVectorImpl<clang::QualType>*) SemaInit.cpp:0:0
 #6 0x0000000006c9cae7 clang::InitializationSequence::Perform(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, clang::QualType*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x6c9cae7)
 #7 0x0000000006ca3dfa (anonymous namespace)::InitListChecker::CheckSubElementType(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType, unsigned int&, clang::InitListExpr*, unsigned int&, bool) SemaInit.cpp:0:0
 #8 0x0000000006cade6f (anonymous namespace)::InitListChecker::CheckArrayType(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, llvm::APSInt, bool, unsigned int&, clang::InitListExpr*, unsigned int&) SemaInit.cpp:0:0
 #9 0x0000000006ca42ea (anonymous namespace)::InitListChecker::CheckListElementTypes(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, unsigned int&, clang::InitListExpr*, unsigned int&, bool) (.constprop.0) SemaInit.cpp:0:0
#10 0x0000000006ca533a (anonymous namespace)::InitListChecker::CheckExplicitInitList(clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, clang::InitListExpr*, bool) (.constprop.0) SemaInit.cpp:0:0
#11 0x0000000006ca5c57 (anonymous namespace)::InitListChecker::InitListChecker(clang::Sema&, clang::InitializedEntity const&, clang::InitListExpr*, clang::QualType&, bool, bool, bool, llvm::SmallVectorImpl<clang::QualType>*) SemaInit.cpp:0:0
#12 0x0000000006c9cae7 clang::InitializationSequence::Perform(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, clang::QualType*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x6c9cae7)
#13 0x00000000069c2804 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x69c2804)
#14 0x00000000065ffe33 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65ffe33)
#15 0x000000000661448c clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x661448c)
#16 0x000000000661563c clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x661563c)
#17 0x0000000006615a9a clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x6615a9a)
#18 0x00000000066d6416 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::LabelDecl*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x66d6416)
#19 0x00000000066d6d56 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x66d6d56)
#20 0x00000000066df811 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x66df811)
#21 0x00000000066e02ba clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x66e02ba)
#22 0x00000000065c901b clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::LateParsedAttrList*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65c901b)
#23 0x00000000066148ef clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x66148ef)
#24 0x00000000065c16b7 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65c16b7)
#25 0x00000000065c1e5f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65c1e5f)
#26 0x00000000065ca74f clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65ca74f)
#27 0x00000000065cc057 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65cc057)
#28 0x00000000065cc3c0 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65cc3c0)
#29 0x00000000065a4e13 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x65a4e13)
#30 0x00000000048e4d45 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+0x48e4d45)
#31 0x0000000004c20faa clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+0x4c20faa)
#32 0x0000000004b9bf25 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4b9bf25)
#33 0x0000000004d1a75b clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4d1a75b)
#34 0x0000000000dfec48 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+0xdfec48)
#35 0x0000000000df693b ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#36 0x0000000000df69dd int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#37 0x0000000004956b49 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::'lambda'()>(long) Job.cpp:0:0
#38 0x0000000003e20d63 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3e20d63)
#39 0x0000000004956d69 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#40 0x0000000004918b92 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x4918b92)
#41 0x0000000004919a71 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x4919a71)
#42 0x0000000004922a8c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4922a8c)
#43 0x0000000000dfb451 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0xdfb451)
#44 0x0000000000ca617a main (/opt/compiler-explorer/clang-trunk/bin/clang+0xca617a)
#45 0x00007bf99e229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#46 0x00007bf99e229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#47 0x0000000000df63d5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+0xdf63d5)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Compiler returned: 139
Clang version:
clang version: clang version 19.1.6                 clang -x c -O3 -c

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