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-rw-r--r--apps/x11_main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/apps/x11_main.c b/apps/x11_main.c
index a9fe22f8..f09eea8f 100644
--- a/apps/x11_main.c
+++ b/apps/x11_main.c
@@ -138,6 +138,8 @@ static void winopen(void)
ximage_get_visual(),
0,
nil);
+ if (xwin == None)
+ winerror(&gapp, fz_throw("cannot create window"));
XSetWindowColormap(xdpy, xwin, ximage_get_colormap());
XSelectInput(xdpy, xwin,