[LLVMbugs] [Bug 9729] New: Error truncation removes helpful information

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9729

           Summary: Error truncation removes helpful information
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: csdavec at swan.ac.uk
                CC: llvmbugs at cs.uiuc.edu


I recently got this error compiling some code with clang:


CGObjCGNU.cpp:250:9: error: call to 'get' is ambiguous
        IdTy = llvm::StructType::get(Context, OpaqueIdTy, NULL);
               ^~~~~~~~~~~~~~~~~~~~~
/usr/home/theraven/llvm/include/llvm/DerivedTypes.h:246:22: note: candidate
function
  static StructType *get(LLVMContext &Context, 
                     ^
/usr/home/theraven/llvm/include/llvm/DerivedTypes.h:260:22: note: candidate
function
  static StructType *get(LLVMContext &Context, 
                     ^
1 error generated.

>From the two error lines, the candidate functions appear identical.  In
contrast, GCC gives this error:

error: ISO C++ says that these are ambiguous, even though the worst conversion
for the first is better than the worst conversion for the second:
/usr/home/theraven/llvm/include/llvm/DerivedTypes.h:248: note: candidate 1:
static llvm::StructType* llvm::StructType::get(llvm::LLVMContext&,
llvm::ArrayRef<const llvm::Type*>, bool)
/usr/home/theraven/llvm/include/llvm/DerivedTypes.h:261: note: candidate 2:
static llvm::StructType* llvm::StructType::get(llvm::LLVMContext&, const
llvm::Type*, ...)

While this isn't as pretty, it does actually give me useful information.

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