[LLVMbugs] [Bug 9461] New: Assertion `ResultKind != Found || Decls.size() == 1' on invalid code

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9461

           Summary: Assertion `ResultKind != Found || Decls.size() == 1'
                    on invalid code
           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


Created an attachment (id=6313)
 --> (http://llvm.org/bugs/attachment.cgi?id=6313)
Asserting testcase

The attached code (apologises for it's size, it came from a fuzzer and I could
not reduce it further) produces the following backtrace:

assert3.cc:19:1: error: C++ requires a type specifier for all declarations
_S_construct();
^~~~~~~~~~~~
assert3.cc:30:29: error: expected '}'                                           
system_error():time_error(""
                            ^
assert3.cc:29:34: note: to match this '{'                                       
struct system_error:runtime_error{
                                 ^
assert3.cc:30:29: error: expected ')'                                           
system_error():time_error(""
                            ^
assert3.cc:30:26: note: to match this '('                                       
system_error():time_error(""
                         ^
assert3.cc:30:16: error: initializer 'time_error' does not name a non-static
data member or base class; did you mean the base class 'runtime_error'?         
system_error():time_error(""
               ^~~~~~~~~~
               runtime_error                                                    
assert3.cc:29:21: note: base class 'runtime_error' specified here               
struct system_error:runtime_error{
                    ^~~~~~~~~~~~~
assert3.cc:30:29: error: expected '{' or ','                                    
system_error():time_error(""
                            ^
assert3.cc:30:29: error: expected ';' after struct                              
system_error():time_error(""
                            ^
                            ;                                                   
clang: SemaLookup.cpp:301: void clang::LookupResult::sanity() const: Assertion
`ResultKind != Found || Decls.size() == 1' failed.                              
0  clang           0x00000000023fb09d
1  clang           0x00000000023fae90
2  libpthread.so.0 0x00007f28c22248f0
3  libc.so.6       0x00007f28c1513a75 gsignal + 53
4  libc.so.6       0x00007f28c15175c0 abort + 384
5  libc.so.6       0x00007f28c150c941 __assert_fail + 241
6  clang           0x0000000001435d38 clang::LookupResult::sanity() const + 136
7  clang           0x0000000001301ea8 clang::LookupResult::getResultKind()
const + 24
8  clang           0x0000000001301e88 clang::LookupResult::isAmbiguous() const
+ 24
9  clang           0x0000000001301f60 clang::LookupResult::diagnose() + 24
10 clang           0x0000000001301e41 clang::LookupResult::~LookupResult() + 39
11 clang           0x000000000152a319
12 clang           0x0000000001519f57
13 clang           0x000000000151a714
14 clang           0x0000000001515b8a clang::Sema::SubstExprs(clang::Expr**,
unsigned int, bool, clang::MultiLevelTemplateArgumentList const&,
llvm::SmallVectorImpl<clang::Expr*>&) + 142
15 clang           0x000000000153936c
16 clang           0x000000000154224a
clang::Sema::InstantiateMemInitializers(clang::CXXConstructorDecl*,
clang::CXXConstructorDecl const*, clang::MultiLevelTemplateArgumentList const&)
+ 1250
17 clang           0x000000000154164c
clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation,
clang::FunctionDecl*, bool, bool) + 1710
18 clang           0x0000000001543adb
clang::Sema::PerformPendingInstantiations(bool) + 341
19 clang           0x00000000012f11e4 clang::Sema::ActOnEndOfTranslationUnit()
+ 376
20 clang           0x00000000012b1007
clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) + 119
21 clang           0x0000000001299705 clang::ParseAST(clang::Sema&, bool) + 328
22 clang           0x00000000010015c1 clang::ASTFrontendAction::ExecuteAction()
+ 263
23 clang           0x000000000113bfaf clang::CodeGenAction::ExecuteAction() +
947
24 clang           0x0000000001001212 clang::FrontendAction::Execute() + 320
25 clang           0x0000000000fe9ec9
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 751
26 clang           0x0000000000f93583
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 912
27 clang           0x0000000000f855c7 cc1_main(char const**, char const**, char
const*, void*) + 982
28 clang           0x0000000000f8ea3c main + 499
29 libc.so.6       0x00007f28c14fec4d __libc_start_main + 253
30 clang           0x0000000000f84c69
Stack dump:
0.      Program arguments: /llvmdebug/bin/clang -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
assert3.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/3.0
-ferror-limit 19 -fmessage-length 195 -fcxx-exceptions -fexceptions
-fgnu-runtime -fdiagnostics-show-option -fcolor-diagnostics -o assert3.o -x c++
assert3.cc 
1.      <eof> parser at end of file
2.      assert3.cc:13:1: instantiating function definition 'basic_string'
clang: error: unable to execute command: Aborted
clang: error: clang frontend command failed due to signal 1 (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.