Internal compiler error (push_compiler_frame0)

[Chris Angelico]

The following code triggers an "internal error" (seems to be from
language.yacc:699).

function frame0(function x)
{
    return lambda()
    {
        if (string bad=x() //Missing close parenthesis
        {
        }
    };
}

$ pike frame0.pike
frame0.pike:6:Internal compiler error (push_compiler_frame0).
frame0.pike:8:Missing ')'.
frame0.pike:10:Missing ';'.
frame0.pike:10:Unexpected end of file.
frame0.pike:10:Missing '}'.
frame0.pike:10:Opening '{' was here.
frame0.pike:10:Unexpected end of file.
Pike: Failed to compile script.

The code *is* in error (there should be another close parenthesis on
line 5), but the actual error is masked. Is this worth looking into?

ChrisA