Origin:
https://sourceforge.net/p/mcj/tickets/185/
https://sourceforge.net/p/mcj/fig2dev/ci/da8992f44b84a337b4edaa67fc8b36b55eaef696/

--- a/fig2dev/object.h
+++ b/fig2dev/object.h
@@ -57,12 +57,13 @@
 	struct f_comment	*next;
 } F_comment;
 
+#define	STYLE_VAL_MAX	6400.0	/* dash length 80 inches, that is enough */
 #define COMMON_PROPERTIES(o)						\
 	o->style < SOLID_LINE || o->style > DASH_3_DOTS_LINE ||		\
 	o->thickness < 0 || o->depth < 0 || o->depth > 999 ||		\
 	o->fill_style < UNFILLED ||					\
 	o->fill_style >= NUMSHADES + NUMTINTS + NUMPATTERNS ||		\
-	o->style_val < 0.0
+	o->style_val < 0.0 || o->style_val > STYLE_VAL_MAX
 
 typedef struct f_ellipse {
 	int			type;