[llvm-bugs] [Bug 46355] New: Crash when deserializing ASTs with certain concept constructs
via llvm-bugs
llvm-bugs at lists.llvm.org
Tue Jun 16 18:27:51 PDT 2020
https://bugs.llvm.org/show_bug.cgi?id=46355
Bug ID: 46355
Summary: Crash when deserializing ASTs with certain concept
constructs
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: aaronpuchert at alice-dsl.net
CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
neeilans at live.com, richard-llvm at metafoo.co.uk
Create bug.hpp with
template <typename T1, typename T2>
concept Foo = true;
template <typename T1, typename T2>
struct Bug
{
template <Foo<Bug> T>
Bug(T&&) requires true;
template <Foo<Bug> T>
Bug(T&&);
};
template <typename T1, typename T2>
Bug(T1, T2) -> Bug<T1, T2>;
and bug.cpp with
Bug bug(1.0, false);
Then run
clang -cc1 -std=c++2a bug.hpp -emit-pch -o bug.pch
clang -cc1 -std=c++2a -fsyntax-only -include-pch bug.pch bug.cpp
This results in a crash with stack
#5 clang::ConceptReference::getNamedConcept() const
clang/include/clang/AST/ASTConcept.h:155:12
#6 isSameTemplateParameter(clang::NamedDecl const*, clang::NamedDecl const*)
clang/lib/Serialization/ASTReaderDecl.cpp:2906:38
#7 isSameTemplateParameterList(clang::ASTContext const&,
clang::TemplateParameterList const*, clang::TemplateParameterList const*)
clang/lib/Serialization/ASTReaderDecl.cpp:2997:9
#8 isSameEntity(clang::NamedDecl*, clang::NamedDecl*)
clang/lib/Serialization/ASTReaderDecl.cpp:3199:12
#9 clang::ASTDeclReader::findExisting(clang::NamedDecl*)
clang/lib/Serialization/ASTReaderDecl.cpp:3485:13
#10 void
clang::ASTDeclReader::mergeRedeclarable<clang::RedeclarableTemplateDecl>(clang::Redeclarable<clang::RedeclarableTemplateDecl>*,
clang::ASTDeclReader::RedeclarableResult&, unsigned int)
clang/lib/Serialization/ASTReaderDecl.cpp:2493:31
#11
clang::ASTDeclReader::VisitRedeclarableTemplateDecl(clang::RedeclarableTemplateDecl*)
clang/lib/Serialization/ASTReaderDecl.cpp:2078:15
#12
clang::ASTDeclReader::VisitFunctionTemplateDecl(clang::FunctionTemplateDecl*)
clang/lib/Serialization/ASTReaderDecl.cpp:2222:31
#13 clang::declvisitor::Base<std::add_pointer, clang::ASTDeclReader,
void>::Visit(clang::Decl*) clang/include/clang/AST/DeclNodes.inc:213:1
#14 clang::ASTDeclReader::Visit(clang::Decl*)
clang/lib/Serialization/ASTReaderDecl.cpp:519:37
#15 clang::ASTReader::ReadDeclRecord(unsigned int)
clang/lib/Serialization/ASTReaderDecl.cpp:4048:40
#16 clang::ASTReader::GetDecl(unsigned int)
clang/lib/Serialization/ASTReader.cpp:7422:5
#17 clang::ASTReader::FindExternalVisibleDeclsByName(clang::DeclContext const*,
clang::DeclarationName) clang/lib/Serialization/ASTReader.cpp:7613:21
#18 clang::DeclContext::lookup(clang::DeclarationName) const
clang/lib/AST/DeclBase.cpp:1665:60
#19 clang::Sema::DeclareImplicitDeductionGuides(clang::TemplateDecl*,
clang::SourceLocation) clang/lib/Sema/SemaTemplate.cpp:2345:18
#20 DeclareImplicitMemberFunctionsWithName(clang::Sema&,
clang::DeclarationName, clang::SourceLocation, clang::DeclContext const*)
clang/lib/Sema/SemaLookup.cpp:1020:5
#21 LookupDirect(clang::Sema&, clang::LookupResult&, clang::DeclContext const*)
clang/lib/Sema/SemaLookup.cpp:1038:35
#22 clang::Sema::LookupQualifiedName(clang::LookupResult&, clang::DeclContext*,
bool) clang/lib/Sema/SemaLookup.cpp:2252:7
#23
clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*,
clang::InitializedEntity const&, clang::InitializationKind const&,
llvm::MutableArrayRef<clang::Expr*>) clang/lib/Sema/SemaInit.cpp:9784:10
#24 clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*,
clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*,
clang::SourceRange, bool, clang::Expr*) clang/lib/Sema/SemaDecl.cpp:11444:12
#25 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool,
clang::Expr*) clang/lib/Sema/SemaDecl.cpp:11538:26
#26 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool)
clang/lib/Sema/SemaDecl.cpp:11889:9
#27
clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&,
clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*)
clang/lib/Parse/ParseDecl.cpp:2456:3
#28 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&,
clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*)
clang/lib/Parse/ParseDecl.cpp:2128:9
#29
clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec&, clang::AccessSpecifier)
clang/lib/Parse/Parser.cpp:1099:10
#30
clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*, clang::AccessSpecifier)
clang/lib/Parse/Parser.cpp:1115:12
#31
clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&,
clang::ParsingDeclSpec*) clang/lib/Parse/Parser.cpp:935:12
#32 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&,
bool) clang/lib/Parse/Parser.cpp:683:12
#33
clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&)
clang/lib/Parse/Parser.cpp:555:8
#34 clang::ParseAST(clang::Sema&, bool, bool)
clang/lib/Parse/ParseAST.cpp:157:15
#35 clang::ASTFrontendAction::ExecuteAction()
clang/lib/Frontend/FrontendAction.cpp:1062:1
#36 clang::FrontendAction::Execute()
clang/lib/Frontend/FrontendAction.cpp:957:7
#37 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
clang/lib/Frontend/CompilerInstance.cpp:973:23
#38 clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:282:8
#39 cc1_main(llvm::ArrayRef<char const*>, char const*, void*)
clang/tools/driver/cc1_main.cpp:240:13
#40 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
clang/tools/driver/driver.cpp:330:5
#41 main clang/tools/driver/driver.cpp:407:5
The reproducer is from Matt Whitlock in
https://bugs.kde.org/show_bug.cgi?id=422716#c2.
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