[Bug 85058] [snb][regression] Crash when scaling Java application window

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85058

--- Comment #17 from Chris Wilson <chris at chris-wilson.co.uk> ---
The root cause should be fixed by:

diff --git a/Xext/shm.c b/Xext/shm.c
index b2ede99..f5562c0 100644
--- a/Xext/shm.c
+++ b/Xext/shm.c
@@ -281,21 +281,21 @@ ShmDestroyPixmap(PixmapPtr pPixmap)
 {
     ScreenPtr pScreen = pPixmap->drawable.pScreen;
     ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
+    ShmDescPtr shmdesc = NULL;
     Bool ret;

-    if (pPixmap->refcnt == 1) {
-        ShmDescPtr shmdesc;
-
+    if (pPixmap->refcnt == 1)
         shmdesc = (ShmDescPtr) dixLookupPrivate(&pPixmap->devPrivates,
                                                 shmPixmapPrivateKey);
-        if (shmdesc)
-            ShmDetachSegment((void *) shmdesc, pPixmap->drawable.id);
-    }

     pScreen->DestroyPixmap = screen_priv->destroyPixmap;
     ret = (*pScreen->DestroyPixmap) (pPixmap);
     screen_priv->destroyPixmap = pScreen->DestroyPixmap;
     pScreen->DestroyPixmap = ShmDestroyPixmap;
+
+    if (shmdesc)
+       ShmDetachSegment((void *) shmdesc, pPixmap->drawable.id);
+
     return ret;
 }

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