nixpkgs/pkgs/development/libraries/lesstif/c-render_table_crash.patch

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--- lesstif2-0.95.0.orig/lib/Xm-2.1/RenderTable.c
+++ lesstif2-0.95.0/lib/Xm-2.1/RenderTable.c
@@ -465,7 +465,7 @@
DEBUGOUT(_LtDebug(__FILE__, w, "_XmRenderTableFinaliseTag(%s)\n", tag));
#if 1
/* Experimental start */
- if (r->dpy == 0)
+ if (r->dpy == 0 && w)
r->dpy = XtDisplay(w);
/* Experimental end */
#endif