| Issue |
140450
|
| Summary |
Clang crash in void clang::LocalInstantiationScope::InstantiatedLocal "Already instantiated this local"
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
alexfh
|
Clang crashes with an assertion failure on valid code:
```
clang++: /root/llvm-project/llvm/tools/clang/lib/Sema/SemaTemplateInstantiate.cpp:4579: void clang::LocalInstantiationScope::InstantiatedLocal(const clang::Decl*, clang::Decl*): Assertion `cast<Decl *>(Stored) == Inst && "Already instantiated this local"' 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: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1. <eof> parser at end of file
2. <source>:55:6: instantiating function definition '(anonymous namespace)::Component<(lambda at <source>:59:13)>'
3. <source>:36:12: instantiating function definition '(anonymous namespace)::S::apply<(lambda at <source>:59:13), int, int>::Op::operator()'
#0 0x0000000003f9b2a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f9b2a8)
#1 0x0000000003f98f34 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f98f34)
#2 0x0000000003eddb68 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007b3979442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007b39794969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007b3979442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007b39794287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007b397942871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007b3979439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000071e68d5 clang::LocalInstantiationScope::InstantiatedLocal(clang::Decl const*, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x71e68d5)
#10 0x0000000007221aa4 clang::Sema::SubstParmVarDecl(clang::ParmVarDecl*, clang::MultiLevelTemplateArgumentList const&, int, clang::UnsignedOrNone, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7221aa4)
#11 0x0000000007222996 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformFunctionTypeParams(clang::SourceLocation, llvm::ArrayRef<clang::ParmVarDecl*>, clang::QualType const*, clang::FunctionType::ExtParameterInfo const*, llvm::SmallVectorImpl<clang::QualType>&, llvm::SmallVectorImpl<clang::ParmVarDecl*>*, clang::Sema::ExtParameterInfoBuilder&, unsigned int*) SemaTemplateInstantiate.cpp:0:0
#12 0x00000000071fd83c clang::QualType clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformFunctionProtoType<clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformFunctionProtoType(clang::TypeLocBuilder&, clang::FunctionProtoTypeLoc)::'lambda'(clang::FunctionProtoType::ExceptionSpecInfo&, bool&)>(clang::TypeLocBuilder&, clang::FunctionProtoTypeLoc, clang::CXXRecordDecl*, clang::Qualifiers, clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformFunctionProtoType(clang::TypeLocBuilder&, clang::FunctionProtoTypeLoc)::'lambda'(clang::FunctionProtoType::ExceptionSpecInfo&, bool&)) (.constprop.0) SemaTemplateInstantiate.cpp:0:0
#13 0x00000000071feaf7 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateInstantiate.cpp:0:0
#14 0x000000000720543a clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) SemaTemplateInstantiate.cpp:0:0
#15 0x000000000720d7bb clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformTemplateArgument(clang::TemplateArgumentLoc const&, clang::TemplateArgumentLoc&, bool) SemaTemplateInstantiate.cpp:0:0
#16 0x000000000720df48 (anonymous namespace)::TemplateInstantiator::TransformTemplateArgument(clang::TemplateArgumentLoc const&, clang::TemplateArgumentLoc&, bool) SemaTemplateInstantiate.cpp:0:0
#17 0x00000000072109f8 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformTemplateSpecializationType(clang::TypeLocBuilder&, clang::TemplateSpecializationTypeLoc, clang::TemplateName) SemaTemplateInstantiate.cpp:0:0
#18 0x00000000071ff733 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateInstantiate.cpp:0:0
#19 0x000000000721ecc4 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformElaboratedType(clang::TypeLocBuilder&, clang::ElaboratedTypeLoc) SemaTemplateInstantiate.cpp:0:0
#20 0x00000000071fe982 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateInstantiate.cpp:0:0
#21 0x000000000720543a clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformType(clang::TypeSourceInfo*) SemaTemplateInstantiate.cpp:0:0
#22 0x0000000007212dc5 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformTypeWithDeducedTST(clang::TypeSourceInfo*) SemaTemplateInstantiate.cpp:0:0
#23 0x00000000072132ff clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCXXUnresolvedConstructExpr(clang::CXXUnresolvedConstructExpr*) SemaTemplateInstantiate.cpp:0:0
#24 0x00000000071ed69c clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#25 0x00000000071ef3b7 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExprs(clang::Expr* const*, unsigned int, bool, llvm::SmallVectorImpl<clang::Expr*>&, bool*) SemaTemplateInstantiate.cpp:0:0
#26 0x00000000071fa209 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) SemaTemplateInstantiate.cpp:0:0
#27 0x00000000071ed6d8 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#28 0x000000000722d777 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformStmt(clang::Stmt*, clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::StmtDiscardKind) SemaTemplateInstantiate.cpp:0:0
#29 0x000000000722e00e clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#30 0x00000000071ec7c6 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformLambdaExpr(clang::LambdaExpr*) SemaTemplateInstantiate.cpp:0:0
#31 0x00000000071ed2d2 (anonymous namespace)::TemplateInstantiator::TransformLambdaExpr(clang::LambdaExpr*) SemaTemplateInstantiate.cpp:0:0
#32 0x00000000071ed85f clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#33 0x000000000720b41e clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCStyleCastExpr(clang::CStyleCastExpr*) SemaTemplateInstantiate.cpp:0:0
#34 0x00000000071ed6ec clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#35 0x000000000722d777 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformStmt(clang::Stmt*, clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::StmtDiscardKind) SemaTemplateInstantiate.cpp:0:0
#36 0x000000000722e00e clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#37 0x0000000007237334 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7237334)
#38 0x0000000007296ac7 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7296ac7)
#39 0x0000000007294916 clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7294916)
#40 0x0000000007296d7b clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7296d7b)
#41 0x0000000007294916 clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7294916)
#42 0x00000000067df402 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::TUFragmentKind) (.part.0) Sema.cpp:0:0
#43 0x00000000067dfca2 clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67dfca2)
#44 0x00000000066400cb clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66400cb)
#45 0x00000000066323ba clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66323ba)
#46 0x0000000004946b78 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4946b78)
#47 0x0000000004c3eb45 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c3eb45)
#48 0x0000000004bbd78e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4bbd78e)
#49 0x0000000004d31629 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d31629)
#50 0x0000000000dace0f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdace0f)
#51 0x0000000000da2fda ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#52 0x00000000049ade69 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
#53 0x0000000003ede004 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ede004)
#54 0x00000000049ae47f 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
#55 0x000000000497024d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x497024d)
#56 0x00000000049712de clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49712de)
#57 0x00000000049795c5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49795c5)
#58 0x0000000000da8d78 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda8d78)
#59 0x0000000000c2e774 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc2e774)
#60 0x00007b3979429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#61 0x00007b3979429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#62 0x0000000000da2a85 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda2a85)
```
Reduced test case: https://gcc.godbolt.org/z/sdxq1aP89
```
namespace {
struct Call {
template <typename F>
struct apply : F::template apply<void> {};
};
template <typename MetaExpr>
struct DoEval {
using type = MetaExpr;
};
template <typename MetaFun, typename... MetaExprs>
struct DoEval<MetaFun(MetaExprs...)> {
using type = typename DoEval<typename MetaFun::template apply<
typename DoEval<MetaExprs>::type...>::type>::type;
};
template <typename MetaFun, typename... MetaExprs>
struct DoEval<MetaFun (*)(MetaExprs...)> {
using type = typename DoEval<typename MetaFun::template apply<
typename DoEval<MetaExprs>::type...>::type>::type;
};
template <typename MetaExpr>
using Eval = typename DoEval<MetaExpr>::type;
struct GetNthType {
template <typename N>
struct apply {
using type = int;
};
};
template <typename F, typename... Args>
static auto invoke(Args...) -> void;
template <typename>
struct Arg {};
struct S {
template <typename Lambda, typename... Indexes>
struct apply {
struct Op {
void operator()() {
(void)[] { invoke<Lambda>(Arg<GetNthType(Indexes)>()...); };
}
};
using type = Op;
};
};
struct F {
template <typename Lambda>
struct apply {
struct type {
template<typename C>
struct apply {
using type = S(Lambda, int, int);
};
};
};
};
template <typename Lambda>
void Component(Lambda&&) {
Eval<Call(F(Lambda))>()();
}
void f() {
Component([] {});
}
}
```
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