[Bug 39257] New: user32/tests/dde.c crashes under valgrind

https://bugs.winehq.org/show_bug.cgi?id=39257

Bug ID: 39257
           Summary: user32/tests/dde.c crashes under valgrind
           Product: Wine
           Version: 1.7.51
          Hardware: x86
                OS: Linux
            Status: NEW
          Keywords: download, source, testcase, valgrind
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Fedora

Created attachment 52324
  --> https://bugs.winehq.org/attachment.cgi?id=52324
backtrace

Backtrace:
=>0 0x0483c341 wine_dbgstr_wn+0x76(str="????????????????H", n=0xffffffff)
[/home/austin/wine-valgrind/dlls/user32/tests/../../../include/wine/test.h:486]
in user32_test (0x04acf528)
  1 0x047718bc wine_dbgstr_w+0x1f(s="????????????????H")
[/home/austin/wine-valgrind/dlls/user32/tests/../../../include/wine/test.h:69]
in user32_test (0x04acf548)
  2 0x0477e757 server_end_to_end_callback+0x718(uType=<couldn't compute
location>, uFmt=<couldn't compute location>, hconv=<couldn't compute location>,
hsz1=<couldn't compute location>, hsz2=<couldn't compute location>,
hdata=<couldn't compute location>, dwData1=<couldn't compute location>,
dwData2=<couldn't compute location>)
[/home/austin/wine-valgrind/dlls/user32/tests/dde.c:2464] in user32_test
(0x04acf788)
  3 0x04b0b4b2 WDML_InvokeCallback+0xa2(pInstance=0x46616c8, uType=0x4050,
uFmt=0, hConv=0x46638b0, hsz1=0xc002, hsz2=(nil), hdata=0x4663cf2, dwData1=0,
dwData2=0) [/home/austin/wine-valgrind/dlls/user32/dde_misc.c:1231] in user32
(0x04acf7e8)
  4 0x04b0f980 WDML_ServerHandleExecute+0x134(pConv=0x46638b0, pXAct=0x4663cb0)
[/home/austin/wine-valgrind/dlls/user32/dde_server.c:834] in user32
(0x04acf848)
  5 0x04b0fe35 WDML_ServerHandle+0xdd(pConv=0x46638b0, pXAct=0x4663cb0)
[/home/austin/wine-valgrind/dlls/user32/dde_server.c:1002] in user32
(0x04acf888)
  6 0x04b10303 WDML_ServerConvProc+0x3f0(hwndServer=<couldn't compute
location>, iMsg=<couldn't compute location>, wParam=<couldn't compute
location>, lParam=<couldn't compute location>)
[/home/austin/wine-valgrind/dlls/user32/dde_server.c:1112] in user32
(0x04acf908)
  7 0x04b8870a WINPROC_wrapper+0x19() in user32 (0x04acf948)
  8 0x04b8883d call_window_proc+0xb1(hwnd=0xb2011a, msg=0x3e8, wp=0xaf011e,
lp=0x4663c4a, result=0x4acfac8, arg=0x4b0ff12)
[/home/austin/wine-valgrind/dlls/user32/winproc.c:245] in user32 (0x04acf988)
  9 0x04b8a67b WINPROC_call_window+0x1c2(hwnd=0xb2011a, msg=0x3e8,
wParam=0xaf011e, lParam=0x4663c4a, result=0x4acfac8, unicode=0,
mapping=WMCHAR_MAP_DISPATCHMESSAGE)
[/home/austin/wine-valgrind/dlls/user32/winproc.c:910] in user32 (0x04acf9d8)
  10 0x04b51dc0 DispatchMessageA+0x1a7(msg=<couldn't compute location>)
[/home/austin/wine-valgrind/dlls/user32/message.c:3952] in user32 (0x04acfaf8)
  11 0x0477f5ca test_end_to_end_server+0x18c(hproc=0x5c, hthread=0x60,
type_a=0x1) [/home/austin/wine-valgrind/dlls/user32/tests/dde.c:2674] in
user32_test (0x04acfb58)
  12 0x0477f95f func_dde+0x2ba()
[/home/austin/wine-valgrind/dlls/user32/tests/dde.c:2740] in user32_test
(0x04acfcf8)
  13 0x0483c82d run_test+0x9f(name="dde")
[/home/austin/wine-valgrind/dlls/user32/tests/../../../include/wine/test.h:584]
in user32_test (0x04acfd38)
  14 0x0483cc75 main+0x222(argc=<couldn't compute location>, argv=<couldn't
compute location>)
[/home/austin/wine-valgrind/dlls/user32/tests/../../../include/wine/test.h:666]
in user32_test (0x04acfde8)