[lldb-dev] [Bug 20657] New: Failure to find an enumerator within its enclosing namespace

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20657

            Bug ID: 20657
           Summary: Failure to find an enumerator within its enclosing
                    namespace
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at cs.uiuc.edu
          Reporter: chandlerc at gmail.com
                CC: david.majnemer at gmail.com, tfiala at google.com
    Classification: Unclassified

% cat x.cpp
namespace N {
  enum E { E1, E2, E3 };
}

int main() {
  N::E e = N::E2;
}

% nl x.cpp 
     1  namespace N {
     2    enum E { E1, E2, E3 };
     3  }

     4  int main() {
     5    N::E e = N::E2;
     6  }

% clang++ -g -o x x.cpp

% lldb -- ./x            
Current executable set to './x' (x86_64).
(lldb) b x.cpp:5
Breakpoint 1: where = x`main + 9 at x.cpp:6, address = 0x00000000004005c9
(lldb) r
Process 12194 launching
Process 12194 launched: './x' (x86_64)
Process 12194 stopped
* thread #1: tid = 12194, 0x00007fed45a6e2d0, name = 'x', stop reason = trace
    frame #0: 0x00007fed45a6e2d0
error: No such process
Process 12194 stopped
* thread #1: tid = 12194, 0x00000000004005c9 x`main + 9 at x.cpp:6, name = 'x',
stop reason = breakpoint 1.1
    frame #0: 0x00000000004005c9 x`main + 9 at x.cpp:6
   3    }
   4   
   5    int main() {
-> 6      N::E e = N::E2;
   7    }
(lldb) p N::E2
error: no member named 'E2' in namespace 'N'
error: 1 errors parsing expression

BUG! There is an E2 in the namespace N, this is an unscoped enum.

LLDB does have the enum type:

(lldb) p e
(N::E) $0 = E1
(lldb) p N::E::E2
(int) $1 = 1

So the problem seems to be that we don't form the correct AST from the debug
information here, in particular that the DeclContext of the namespace isn't
getting the names for the enumerators inserted into it.

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