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Fix contributed upstream here:
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=42694.
Index: emacs-26.3/src/xfns.c
===================================================================
--- emacs-26.3.orig/src/xfns.c
+++ emacs-26.3/src/xfns.c
@@ -2628,6 +2628,8 @@ xic_free_xfontset (struct frame *f)
static XIMStyle
best_xim_style (XIMStyles *xim)
{
+ if (xim == NULL) goto out;
+
int i, j;
int nr_supported = ARRAYELTS (supported_xim_styles);
@@ -2636,6 +2638,7 @@ best_xim_style (XIMStyles *xim)
if (supported_xim_styles[i] == xim->supported_styles[j])
return supported_xim_styles[i];
+ out:
/* Return the default style. */
return XIMPreeditNothing | XIMStatusNothing;
}
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