Summary: RefCounted doesn't work with unions due to use of
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: regression
          Priority: P2
         Component: Phobos

--- Comment #0 from David Simcha <> 2011-09-05 17:24:01 PDT ---
import std.typecons;

struct S {
    U u;

union U {
    size_t i;
    void* p;

alias RefCounted!(S) SRC;

C:\dmd2\windows\bin\..\..\src\phobos\std\format.d(1853): Error: static assert 
"unable to format union object because it does not have toString"
C:\dmd2\windows\bin\..\..\src\phobos\std\format.d(1982):        instantiated
from here: formatValue!(Appender!(string),U,char)
C:\dmd2\windows\bin\..\..\src\phobos\std\format.d(309):        instantiated
from here: formatGeneric!(Appender!(string),U,immutable(char))
C:\dmd2\windows\bin\..\..\src\phobos\std\typecons.d(511):        instantiated
from here: formattedWrite!(Appender!(string),immutable(char),U)
    ... (4 instantiations, -v to show) ...
C:\dmd2\windows\bin\..\..\src\phobos\std\typecons.d(2386):        instantiated
from here: Tuple!(S,"_payload",uint,"_count")
C:\code\test.d(12):        instantiated from here: RefCounted!(S)

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