[Issue 6175] New: String corruption when passing static char arrays to std.conv

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6175

           Summary: String corruption when passing static char arrays to
                    std.conv
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2011-06-18 10:18:57 PDT ---
This is fairly odd behavior:

Case 1:
char[9] statCArr = "blablabla";
auto res1 = to!(char[])(statCArr);    

writeln(res1);          // writes M @
writeln(statCArr[]);    // writes blablabla

Case 2:
char[9] statCArr = "blablabla";
auto res1 = to!(char[])(statCArr);    

writeln(res1);          // writes L @
writeln(statCArr);    // writes blablabla

Note: I've only removed the square brackets and this somehow ends up changing
the garbage value of res1. You can add random writeln() statements before the
call to std.conv.to and res would get different results.

If you reduce the character count then you get a compile time error:

char[6] statCArr = "blabla";
auto res2 = to!(char[])(statCArr);

D:\DMD\dmd2\windows\bin\..\..\src\phobos\std\conv.d(99): Error: template
std.conv.toImpl(T,S) if (!implicitlyConverts!(S,T) && isSomeString!(T) &&
isInputRange!(Unqual!(S)) &&
isSomeChar!(ElementType!(S))) toImpl(T,S) if (!implicitlyConverts!(S,T) &&
isSomeString!(T) && isInputRange!(Unqual!(S)) && isSomeChar!(ElementType!(S)))
matches more than one
template declaration,
D:\DMD\dmd2\windows\bin\..\..\src\phobos\std\conv.d(231):toImpl(T,S) if
(isStaticArray!(S)) and
D:\DMD\dmd2\windows\bin\..\..\src\phobos\std\conv.d(566):toImpl(Target,Source)
if (implicitlyConverts!(Source,Target))

So std.conv.to is pretty buggy for static arrays..

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