[LLVMbugs] [Bug 20706] New: Cv-qualification mismatch in dependent pseudo-destructor call fails to reject candidate

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20706

            Bug ID: 20706
           Summary: Cv-qualification mismatch in dependent
                    pseudo-destructor call fails to reject candidate
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hstong at ca.ibm.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Cv-qualification mismatch on a pseudo-destructor call can appear in a SFINAE
context.

Notwithstanding Core Issue 1920, which does not have a proposed resolution as
of R90 of the issues list, the test case below should pass.


### SOURCE:
$ cat sfinaeStrictlyNo1920.cc 
template <typename T, typename U = void>
struct A { typedef T ty; };

template <unsigned> struct NumSink { typedef void ty; };

typedef const int ConstInt;

template <typename T>
struct A<T, typename NumSink<sizeof (0 .ConstInt::~T(), 0)>::ty>
   { enum { val = 0 }; };

typedef A<int>::ty ty;


### COMPILER INVOCATION AND OUTPUT:
$ clang -cc1 -x c++ -std=c++03 sfinaeStrictlyNo1920.cc 
sfinaeStrictlyNo1920.cc:12:9: error: no type named 'ty' in 'A<int, void>'; did
you mean 'NumSink<4>::ty'?
typedef A<int>::ty ty;
        ^~~~~~~~~~
        NumSink<4>::ty
sfinaeStrictlyNo1920.cc:4:51: note: 'NumSink<4>::ty' declared here
template <unsigned> struct NumSink { typedef void ty; };
                                                  ^
1 error generated.


### EXPECTED BEHAVIOUR:
Clean compile.


### COMPILER VERSION INFO:
$ clang -v
clang version 3.6.0 (trunk 215824)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Selected multilib: .;@m64

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