http://d.puremagic.com/issues/show_bug.cgi?id=5698

           Summary: va_arg sets wrong length for (u)short[]
           Product: D
           Version: unspecified
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: mathias.baumann@sociomantic.com


--- Comment #0 from Mathias Baumann <mathias.baumann@sociomantic.com> 2011-03-04 10:07:48 PST ---
Created an attachment (id=929)
test case demonstrating the problem

va_arg sets wrong length for ushort[]

the attached program outputs:

vararg_:
ubyte[].length = 3
ushort[].length = 140737237065760
short[].length = 139885158469104
uint[].length = 3
vararg:
ubyte[].length = 3
ushort[].length = 0
short[].length = 0
uint[].length = 3


I tested with D1, but the bug is possibly also existant in D2.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=5698


Don <clugdbug@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clugdbug@yahoo.com.au


--- Comment #1 from Don <clugdbug@yahoo.com.au> 2011-03-15 02:04:42 PDT ---
When I compile the test code on D2 Windows (replacing tango.stdc.stdarg -> core.stdc.stdarg), I just get indication of memory corruption:

vararg_:
ubyte[].length = 18419671623532547
ushort[].length = 18419809062486019
short[].length = 18419860602093571
uint[].length = 18419912141701123


There's this code in the test case:

   T[] usa;
    va_arg(ap, _arguments[0],cast(void*) &usa);

Are you sure this is correct? Looks wrong to me, remember that static arrays are passed by value.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=5698



--- Comment #2 from Mathias Baumann <mathias.baumann@sociomantic.com> 2011-03-15 03:41:30 PDT ---
I am not 100% sure, no. But I just replaced the array declerations with

    ubyte uba[] = [ 32,33,34];
    uint a[] = [1,2,3];
    ushort c[] = [ cast(ushort)51, 52, 53 ];
    short sc[] = [ cast(short)51, 52, 53 ];


and it resulted in the same problem.
I hope initializing them like this does qualify them as dynamic arrays. (?)

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------