[LLVMbugs] [Bug 7623] New: 'Invalid accessor called' generated by 'template<>template<>a; '

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7623

           Summary: 'Invalid accessor called' generated by
                    'template<>template<>a;'
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chris at bubblescope.net
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


As in title. clang++, given the code:

template<>template<>a;

Produces the backtrace:

t.bashed.9366.cc:1:21: error: C++ requires a type specifier for all
declarations
template<>template<>a;
                    ^
t.bashed.9366.cc:1:1: warning: extraneous template parameter list in template
      specialization
template<>template<>a;
^~~~~~~~~~
t.bashed.9366.cc:1:11: error: extraneous 'template<>' in declaration of
variable
      'a'
template<>template<>a;
          ^~~~~~~~~~
Assertion failed: (is<T>() && "Invalid accessor called"), function get, file
/Users/caj/clang/llvm/include/llvm/ADT/PointerUnion.h, line 99.
0  clang             0x00000001010ce676 PrintStackTrace(void*) + 38
1  clang             0x00000001010ceb84 SignalHandler(int) + 254
2  libSystem.B.dylib 0x00007fff8398c35a _sigtramp + 26
3  libSystem.B.dylib 0x0000000104700000 _sigtramp + 2161589440
4  libSystem.B.dylib 0x00007fff83a079b4 __pthread_markcancel + 0
5  clang             0x00000001005a8177 clang::DeclaratorDecl::ExtInfo*
llvm::PointerUnion<clang::TypeSourceInfo*,
clang::DeclaratorDecl::ExtInfo*>::get<clang::DeclaratorDecl::ExtInfo*>() const
+ 75
6  clang             0x00000001000bfecd clang::DeclaratorDecl::getExtInfo() +
25
7  clang             0x00000001002c06a8
clang::DeclaratorDecl::setTemplateParameterListsInfo(clang::ASTContext&,
unsigned int, clang::TemplateParameterList**) + 32
8  clang             0x00000001002b2eac
clang::Sema::ActOnVariableDeclarator(clang::Scope*, clang::Declarator&,
clang::DeclContext*, clang::QualType, clang::TypeSourceInfo*,
clang::LookupResult&,
clang::ASTMultiPtr<&(clang::ActionBase::DeleteTemplateParams(void*))>, bool&) +
1730
9  clang             0x00000001002b705d
clang::Sema::HandleDeclarator(clang::Scope*, clang::Declarator&,
clang::ASTMultiPtr<&(clang::ActionBase::DeleteTemplateParams(void*))>, bool) +
2881
10 clang             0x00000001003c1890
clang::Sema::ActOnTemplateDeclarator(clang::Scope*,
clang::ASTMultiPtr<&(clang::ActionBase::DeleteTemplateParams(void*))>,
clang::Declarator&) + 90
11 clang             0x000000010068501d
clang::Parser::ParseDeclarationAfterDeclarator(clang::Declarator&,
clang::Parser::ParsedTemplateInfo const&) + 677
12 clang             0x00000001006bd9ac
clang::Parser::ParseSingleDeclarationAfterTemplate(unsigned int,
clang::Parser::ParsedTemplateInfo const&, clang::SourceLocation&,
clang::AccessSpecifier) + 696
13 clang             0x00000001006be07e
clang::Parser::ParseTemplateDeclarationOrSpecialization(unsigned int,
clang::SourceLocation&, clang::AccessSpecifier) + 962
14 clang             0x00000001006be15a
clang::Parser::ParseDeclarationStartingWithTemplate(unsigned int,
clang::SourceLocation&, clang::AccessSpecifier) + 158
15 clang             0x00000001006860ec
clang::Parser::ParseDeclaration(unsigned int, clang::SourceLocation&,
clang::CXX0XAttributeList) + 368
16 clang             0x00000001006c4611
clang::Parser::ParseExternalDeclaration(clang::CXX0XAttributeList) + 2007
17 clang             0x00000001006c483f
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<1>&) + 247
18 clang             0x000000010025c5ad clang::ParseAST(clang::Preprocessor&,
clang::ASTConsumer*, clang::ASTContext&, bool, bool,
clang::CodeCompleteConsumer*) + 456
19 clang             0x000000010007844a
clang::ASTFrontendAction::ExecuteAction() + 254
20 clang             0x000000010021fa70 clang::CodeGenAction::ExecuteAction() +
826
21 clang             0x0000000100078558 clang::FrontendAction::Execute() + 256
22 clang             0x000000010005b720
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 710
23 clang             0x0000000100027f28 cc1_main(char const**, char const**,
char const*, void*) + 1762
24 clang             0x000000010002ef81 main + 335
25 clang             0x0000000100026e48 start + 52
Stack dump:
0.    Program arguments: /usr/local/bin/clang -cc1 -triple
x86_64-apple-darwin10.0.0 -emit-obj -mrelax-all -disable-free -main-file-name
t.bashed.9366.cc -pic-level 1 -mdisable-fp-elim -masm-verbose -munwind-tables
-target-cpu core2 -resource-dir /usr/local/lib/clang/2.8 -ferror-limit 19
-fmessage-length 80 -stack-protector 1 -fblocks -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -o
/var/folders/M8/M86fCFVgGQ0r-V2oY5lLC++++TI/-Tmp-/cc-0nmhBP.o -x c++
t.bashed.9366.cc 
1.    t.bashed.9366.cc:1:22: current parser token ';'
clang: error: clang frontend command failed due to signal 6 (use -v to see
invocation)

-- 
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.