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diff --git a/gfx/cairo/cairo/src/cairo-xlib-display.c b/gfx/cairo/cairo/src/cairo-xlib-display.c
--- cairo/src/cairo-xlib-display.c
+++ cairo/src/cairo-xlib-display.c
@@ -63,6 +63,8 @@ struct _cairo_xlib_job {
};
static cairo_xlib_display_t *_cairo_xlib_display_list;
+
+static int buggy_repeat_force = -1;
static void
_cairo_xlib_call_close_display_hooks (cairo_xlib_display_t *display)
@@ -302,6 +304,17 @@ _cairo_xlib_display_get (Display *dpy)
display->buggy_repeat = TRUE;
}
+ /* XXX workaround; see https://bugzilla.mozilla.org/show_bug.cgi?id=413583 */
+ if (buggy_repeat_force == -1) {
+ if (getenv("MOZ_CAIRO_NO_BUGGY_REPEAT"))
+ buggy_repeat_force = 0;
+ else
+ buggy_repeat_force = 1;
+ }
+
+ if (buggy_repeat_force)
+ display->buggy_repeat = TRUE;
+
display->next = _cairo_xlib_display_list;
_cairo_xlib_display_list = display;
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