https://llvm.org/bugs/show_bug.cgi?id=31548
Bug ID: 31548
Summary: NewImportAttr nullptr dereference
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: tras...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
__declspec(dllimport) uint qHash() ;
template <>
uint qHash
$ clang.exe -c test.cpp
Wrote crash dump file
"C:\Users\holl\AppData\Local\CrashDumps\clang.exe.484a0d.dmp"
#0 0x00000001418929f7 checkDLLAttributeRedeclaration
tools\clang\lib\sema\semadecl.cpp:5735:0
#1 0x0000000141872ef8 clang::Sema::ActOnVariableDeclarator(class clang::Scope
*,class clang::Declarator &,class clang::DeclContext *,class
clang::TypeSourceInfo *,class clang::LookupResult &,class
llvm::MutableArrayRef<class clang::TemplateParameterList *>,bool &,class
llvm::ArrayRef<class clang::BindingDecl *>)
tools\clang\lib\sema\semadecl.cpp:6566:0
#2 0x0000000141886dcf clang::Sema::HandleDeclarator(class clang::Scope *,class
clang::Declarator &,class llvm::MutableArrayRef<class
clang::TemplateParameterList *>) tools\clang\lib\sema\semadecl.cpp:5176:0
#3 0x000000014199a116 clang::Sema::ActOnTemplateDeclarator(class clang::Scope
*,class llvm::MutableArrayRef<class clang::TemplateParameterList *>,class
clang::Declarator &) tools\clang\lib\sema\sematemplate.cpp:6815:0
#4 0x0000000141668f7a
clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(class
clang::Declarator &,struct clang::Parser::ParsedTemplateInfo const &,struct
clang::Parser::ForRangeInit *) tools\clang\lib\parse\parsedecl.cpp:1993:0
#5 0x0000000141680417
clang::Parser::ParseSingleDeclarationAfterTemplate(unsigned int,struct
clang::Parser::ParsedTemplateInfo const &,class clang::ParsingDeclRAIIObject
&,class clang::SourceLocation &,enum clang::AccessSpecifier,class
clang::AttributeList *) tools\clang\lib\parse\parsetemplate.cpp:308:0
#6 0x0000000141680d71
clang::Parser::ParseTemplateDeclarationOrSpecialization(unsigned int,class
clang::SourceLocation &,enum clang::AccessSpecifier,class clang::AttributeList
*) tools\clang\lib\parse\parsetemplate.cpp:152:0
#7 0x000000014167e7ad
clang::Parser::ParseDeclarationStartingWithTemplate(unsigned int,class
clang::SourceLocation &,enum clang::AccessSpecifier,class clang::AttributeList
*) tools\clang\lib\parse\parsetemplate.cpp:38:0
#8 0x0000000141668914 clang::Parser::ParseDeclaration(unsigned int,class
clang::SourceLocation &,struct clang::Parser::ParsedAttributesWithRange &)
tools\clang\lib\parse\parsedecl.cpp:1514:0
#9 0x00000001416510af clang::Parser::ParseExternalDeclaration(struct
clang::Parser::ParsedAttributesWithRange &,class clang::ParsingDeclSpec *)
tools\clang\lib\parse\parser.cpp:788:0
#10 0x0000000141654480 clang::Parser::ParseTopLevelDecl(class
clang::OpaquePtr<class clang::DeclGroupRef> &)
tools\clang\lib\parse\parser.cpp:628:0
clang.exe: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 4.0.0 (trunk 290951)
Target: x86_64-pc-windows-msvc
Thread model: posix
crash site:
if (IsMicrosoft && IsDefinition) {
S.Diag(NewDecl->getLocation(),
diag::warn_redeclaration_without_import_attribute)
<< NewDecl;
S.Diag(OldDecl->getLocation(), diag::note_previous_declaration);
NewDecl->dropAttr<DLLImportAttr>();
NewDecl->addAttr(::new (S.Context) DLLExportAttr(
NewImportAttr->getRange(), S.Context,
NewImportAttr->getSpellingListIndex()));
}
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