[llvm-bugs] [Bug 38444] New: ICE on decltype of dependent member of argument to generic lambda in trailing return type
via llvm-bugs
llvm-bugs at lists.llvm.org
Sat Aug 4 10:55:47 PDT 2018
https://bugs.llvm.org/show_bug.cgi?id=38444
Bug ID: 38444
Summary: ICE on decltype of dependent member of argument to
generic lambda in trailing return type
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangbugs at nondot.org
Reporter: eracpp at eml.cc
CC: dgregor at apple.com, llvm-bugs at lists.llvm.org
The following code ICEs all known versions of Clang dating back to Clang 3.4
(https://wandbox.org/permlink/HzVyaW9GZcHdNG7g):
struct A { int x; };
int main() {
[](auto t) -> decltype(decltype(t)::x) { return 0; }(A());
}
Clang ICE's when `x` is a member of `decltype(t)`.
Oddly, it does not ICE if `x` is not a member of `A`.
It also does not ICE if it is not within the trailing return type.
e.g. the following does not ICE:
struct A { int x; };
int main() {
[](auto t) { return decltype(decltype(t)::x)(0); }(A());
}
----
#0 0x00007f68d9bf164b llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/bin/../lib/libLLVM-6.0.so+0x85464b)
#1 0x00007f68d9bef33e llvm::sys::RunSignalHandlers()
(/usr/bin/../lib/libLLVM-6.0.so+0x85233e)
#2 0x00007f68d9bef5ab (/usr/bin/../lib/libLLVM-6.0.so+0x8525ab)
#3 0x00007f68d786e8f0 __restore_rt (/usr/bin/../lib/libc.so.6+0x368f0)
#4 0x00007f68d4d3676b
clang::Sema::BuildPossibleImplicitMemberExpr(clang::CXXScopeSpec const&,
clang::SourceLocation, clang::LookupResult&, clang::TemplateArgumentListInfo
const*, clang::Scope const*)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x3f676b)
#5 0x00007f68d4c99c79
clang::Sema::BuildQualifiedDeclarationNameExpr(clang::CXXScopeSpec&,
clang::DeclarationNameInfo const&, bool, clang::Scope const*,
clang::TypeSourceInfo**) (/usr/bin/../lib/../lib/libclangSema.so.6+0x359c79)
#6 0x00007f68d4f3d633 (/usr/bin/../lib/../lib/libclangSema.so.6+0x5fd633)
#7 0x00007f68d4f25608 (/usr/bin/../lib/../lib/libclangSema.so.6+0x5e5608)
#8 0x00007f68d4f2d05a (/usr/bin/../lib/../lib/libclangSema.so.6+0x5ed05a)
#9 0x00007f68d4f41c6b
clang::Sema::SubstFunctionDeclType(clang::TypeSourceInfo*,
clang::MultiLevelTemplateArgumentList const&, clang::SourceLocation,
clang::DeclarationName, clang::CXXRecordDecl*, unsigned int)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x601c6b)
#10 0x00007f68d4f4aea4
clang::TemplateDeclInstantiator::SubstFunctionType(clang::FunctionDecl*,
llvm::SmallVectorImpl<clang::ParmVarDecl*>&)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x60aea4)
#11 0x00007f68d4f5cdcb
clang::TemplateDeclInstantiator::VisitCXXMethodDecl(clang::CXXMethodDecl*,
clang::TemplateParameterList*, bool)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x61cdcb)
#12 0x00007f68d4f5992b clang::Sema::SubstDecl(clang::Decl*,
clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x61992b)
#13 0x00007f68d4f10cdc
clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*,
llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int,
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&,
llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool,
llvm::function_ref<bool ()>)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x5d0cdc)
#14 0x00007f68d4f15ead
clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*,
clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>,
clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool,
llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x5d5ead)
#15 0x00007f68d4e26c17
clang::Sema::AddMethodTemplateCandidate(clang::FunctionTemplateDecl*,
clang::DeclAccessPair, clang::CXXRecordDecl*, clang::TemplateArgumentListInfo*,
clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>,
clang::OverloadCandidateSet&, bool, bool)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x4e6c17)
#16 0x00007f68d4e27325 clang::Sema::AddMethodCandidate(clang::DeclAccessPair,
clang::QualType, clang::Expr::Classification, llvm::ArrayRef<clang::Expr*>,
clang::OverloadCandidateSet&, bool)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x4e7325)
#17 0x00007f68d4e39fb3 clang::Sema::BuildCallToObjectOfClassType(clang::Scope*,
clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>,
clang::SourceLocation) (/usr/bin/../lib/../lib/libclangSema.so.6+0x4f9fb3)
#18 0x00007f68d4ca1be7 clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*,
clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>,
clang::SourceLocation, clang::Expr*, bool)
(/usr/bin/../lib/../lib/libclangSema.so.6+0x361be7)
#19 0x00007f68d52cd85a
clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*,
true>) (/usr/bin/../lib/../lib/libclangParse.so.6+0x6b85a)
#20 0x00007f68d52c8124 clang::Parser::ParseCastExpression(bool, bool, bool&,
clang::Parser::TypeCastState, bool)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x66124)
#21 0x00007f68d52ca465 clang::Parser::ParseCastExpression(bool, bool,
clang::Parser::TypeCastState, bool)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x68465)
#22 0x00007f68d52cbb3d
clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x69b3d)
#23 0x00007f68d52cc68a
clang::Parser::ParseExpression(clang::Parser::TypeCastState)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x6a68a)
#24 0x00007f68d53102fb clang::Parser::ParseExprStatement()
(/usr/bin/../lib/../lib/libclangParse.so.6+0xae2fb)
#25 0x00007f68d5311366
clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*,
32u>&, clang::Parser::AllowedConstructsKind, clang::SourceLocation*,
clang::Parser::ParsedAttributesWithRange&)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xaf366)
#26 0x00007f68d53115d6
clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*,
32u>&, clang::Parser::AllowedConstructsKind, clang::SourceLocation*)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xaf5d6)
#27 0x00007f68d5315370 clang::Parser::ParseCompoundStatementBody(bool)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xb3370)
#28 0x00007f68d5317cc8 clang::Parser::ParseFunctionStatementBody(clang::Decl*,
clang::Parser::ParseScope&) (/usr/bin/../lib/../lib/libclangParse.so.6+0xb5cc8)
#29 0x00007f68d5333577
clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xd1577)
#30 0x00007f68d52aa40b clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&,
clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x4840b)
#31 0x00007f68d532d5e3
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xcb5e3)
#32 0x00007f68d532db82 (/usr/bin/../lib/../lib/libclangParse.so.6+0xcbb82)
#33 0x00007f68d53347c1
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) (/usr/bin/../lib/../lib/libclangParse.so.6+0xd27c1)
#34 0x00007f68d5335896
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
(/usr/bin/../lib/../lib/libclangParse.so.6+0xd3896)
#35 0x00007f68d528c113 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/bin/../lib/../lib/libclangParse.so.6+0x2a113)
#36 0x00007f68d8b136e8 clang::CodeGenAction::ExecuteAction()
(/usr/bin/../lib/libclangCodeGen.so.6+0x2916e8)
#37 0x00007f68d8257f26 clang::FrontendAction::Execute()
(/usr/bin/../lib/libclangFrontend.so.6+0xd4f26)
#38 0x00007f68d82174d9
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/bin/../lib/libclangFrontend.so.6+0x944d9)
#39 0x00007f68d7f802d6
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/bin/../lib/libclangFrontendTool.so.6+0x32d6)
#40 0x0000564f525bd4d9 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/bin/clang-6.0+0x104d9)
#41 0x0000564f525b9b01 main (/usr/bin/clang-6.0+0xcb01)
#42 0x00007f68d785b06b __libc_start_main (/usr/bin/../lib/libc.so.6+0x2306b)
#43 0x0000564f525baf6a _start (/usr/bin/clang-6.0+0xdf6a)
Stack dump:
0. Program arguments: /usr/bin/clang-6.0 -cc1 -triple x86_64-pc-linux-gnu
-emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names
-main-file-name main.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie
-mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-dwarf-column-info -debugger-tuning=gdb -resource-dir /usr/lib/clang/6.0.1
-internal-isystem
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../../../include/c++/8.1.1
-internal-isystem
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../../../include/c++/8.1.1/x86_64-pc-linux-gnu
-internal-isystem
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../../../include/c++/8.1.1/backward
-internal-isystem /usr/local/include -internal-isystem
/usr/lib/clang/6.0.1/include -internal-externc-isystem /include
-internal-externc-isystem /usr/include -fdeprecated-macro
-fdebug-compilation-dir /home/eraz/Projects/cpp/shop -ferror-limit 19
-fmessage-length 157 -stack-protector 2 -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o
/tmp/main-eb7950.o -x c++ main.cpp
1. main.cpp:4:61: current parser token ')'
2. main.cpp:3:12: parsing function body 'main'
3. main.cpp:3:12: in compound statement ('{}')
clang-6.0: error: unable to execute command: Segmentation fault (core dumped)
clang-6.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 6.0.1 (tags/RELEASE_601/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang-6.0: note: diagnostic msg: PLEASE submit a bug report to and include the
crash backtrace, preprocessed source, and associated run script.
clang-6.0: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-6.0: note: diagnostic msg: /tmp/main-763743.cpp
clang-6.0: note: diagnostic msg: /tmp/main-763743.sh
clang-6.0: note: diagnostic msg:
********************
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