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-rw-r--r--src/glx/glx_pbuffer.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
index 4c122ba6ddc..f635138d628 100644
--- a/src/glx/glx_pbuffer.c
+++ b/src/glx/glx_pbuffer.c
@@ -379,6 +379,7 @@ CreateDrawable(Display * dpy, const __GLcontextModes * fbconfig,
req->glxwindow = (GLXWindow) XAllocID(dpy);
req->numAttribs = (CARD32) i;
+ assert(attrib_list);
memcpy(data, attrib_list, 8 * i);
UnlockDisplay(dpy);