[LLVMbugs] [Bug 9191] New: Assertion `SrcType->getAs<EnumType>()->getDecl()->isScoped()' in invalid C++0x code

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9191

           Summary: Assertion
                    `SrcType->getAs<EnumType>()->getDecl()->isScoped()' in
                    invalid C++0x code
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++0x
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chris at bubblescope.net
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Created an attachment (id=6147)
 --> (http://llvm.org/bugs/attachment.cgi?id=6147)
Asserting invalid file

The attached, invalid C++ produces an assertion when compiled with -std=c++0x.
It does not crash with c++98.

This assertion is happening on a huge portion of boost when compiled in c++0x
mode, so fixing it should hopefully help get boost working with clang's c++0x
mode.



t.cc:1:6: error: ISO C++ forbids forward references to 'enum' types
enum test_unit_type;
     ^
t.cc:7:6: error: expected '}'                                                   
type ;
     ^
t.cc:6:1: note: to match this '{'                                               
{
^
t.cc:8:2: error: expected ';' after struct                                      
}};
 ^
 ;                                                                              
t.cc:8:2: error: expected external declaration                                  
t.cc:12:1: error: expected '{' after base class list
template<typename UnitType> 
^
t.cc:10:29: error: expected ';' after struct                                    
struct test_case : test_unit
                            ^
                            ;                                                   
t.cc:14:3: warning: expression result unused [-Wunused-value]                   
{ static_cast<test_unit_type>(UnitType::type ); }
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
clang: SemaCXXCast.cpp:612: TryCastResult TryStaticCast(clang::Sema&,
clang::Expr*&, clang::QualType, bool, const clang::SourceRange&, unsigned int&,
clang::CastKind&, clang::CXXCastPath&): Assertion
`SrcType->getAs<EnumType>()->getDecl()->isScoped()' failed.
0  clang           0x0000000002355a69
1  clang           0x000000000235585c
2  libpthread.so.0 0x00007f4872d748f0
3  libc.so.6       0x00007f4872063a75 gsignal + 53
4  libc.so.6       0x00007f48720675c0 abort + 384
5  libc.so.6       0x00007f487205c941 __assert_fail + 241
6  clang           0x00000000012c21c9
7  clang           0x00000000012c1d93
8  clang           0x00000000012c0718
clang::Sema::BuildCXXNamedCast(clang::SourceLocation, clang::tok::TokenKind,
clang::TypeSourceInfo*, clang::Expr*, clang::SourceRange, clang::SourceRange) +
1178
9  clang           0x00000000014c04c3
10 clang           0x00000000014bfe5c
11 clang           0x00000000014bb94a
12 clang           0x00000000014b3236
13 clang           0x00000000014a6c62
14 clang           0x00000000014a65e8
15 clang           0x00000000014b9ab8
16 clang           0x00000000014ad202
17 clang           0x00000000014a6236
18 clang           0x00000000014a2dad clang::Sema::SubstStmt(clang::Stmt*,
clang::MultiLevelTemplateArgumentList const&) + 125
19 clang           0x00000000014cc67a
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool) + 1740
20 clang           0x00000000014ce89f
clang::Sema::PerformPendingInstantiations(bool) + 341
21 clang           0x00000000012af1d6 clang::Sema::ActOnEndOfTranslationUnit()
+ 376
22 clang           0x0000000001271bd9
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 119
23 clang           0x000000000125b0e0 clang::ParseAST(clang::Sema&, bool) + 328
24 clang           0x0000000000fbf363 clang::ASTFrontendAction::ExecuteAction()
+ 263
25 clang           0x0000000001103d39 clang::CodeGenAction::ExecuteAction() +
951
26 clang           0x0000000000fbefb4 clang::FrontendAction::Execute() + 320
27 clang           0x0000000000fa659d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 751
28 clang           0x0000000000f536c5
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 858
29 clang           0x0000000000f455c9 cc1_main(char const**, char const**, char
const*, void*) + 1032
30 clang           0x0000000000f4ec2c main + 499
31 libc.so.6       0x00007f487204ec4d __libc_start_main + 253
32 clang           0x0000000000f44c39
Stack dump:
0.      Program arguments: /llvmdebug/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
t.cc -mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version
2.20.1 -momit-leaf-frame-pointer -resource-dir /llvmdebug/bin/../lib/clang/2.9
-std=c++0x -ferror-limit 19 -fmessage-length 192 -fexceptions -fgnu-runtime
-fdiagnostics-show-option -fcolor-diagnostics -o t.o -x c++ t.cc 
1.      <eof> parser at end of file
2.      t.cc:13:5: instantiating function definition 'get'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal 1 (use -v to see
invocation)

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