[Bug 59977] Acrobat Reader DC locks up opening a PDF directly with "wine some.pdf"

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59977

--- Comment #3 from Alex Henrie <[e-mail]> ---
AcroRd32.exe was crashing on start until I ran the following command to disable
protected mode in the registry:

wine reg add "HKCU\Software\Adobe\Acrobat Reader\DC\Privileged" /v
bProtectedMode /t REG_DWORD /d 0 /f

After that, it runs but hangs if you try to click anything in the user
interface, and eventually there is a stack overflow:

0124:fixme:richedit:TextPara_GetAlignment stack overflow 1220 bytes addr
0x7ba65cc6 stack 0x220b3c (0x220000-0x221000-0x320000)

I am not seeing any difference in behavior before or after commit 42579f1dcd2.
The following patch fixes it for me:

diff --git a/dlls/riched20/richole.c b/dlls/riched20/richole.c
index 11fde52873e..42ed8a084d7 100644
--- a/dlls/riched20/richole.c
+++ b/dlls/riched20/richole.c
@@ -3678,6 +3678,7 @@ static HRESULT WINAPI TextPara_GetAlignment(ITextPara
*iface, LONG *value)
 {
     ITextParaImpl *This = impl_from_ITextPara(iface);
     FIXME("(%p)->(%p)\n", This, value);
+    if (value) *value = 0;
     return E_NOTIMPL;
 }

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