Origin:
https://sourceforge.net/p/mcj/tickets/192/
https://sourceforge.net/p/mcj/fig2dev/ci/dfa8b661b506a463a669754ed635b0a8eb67580e/

--- a/fig2dev/read.c	2025-04-29 13:52:18.589400762 +0800
+++ b/fig2dev/read.c	2025-04-29 13:55:48.807400762 +0800
@@ -1539,9 +1539,11 @@
 			free_splinestorage(s);
 			return NULL;
 		}
-		if (lx < INT_MIN || lx > INT_MAX || ly < INT_MIN ||
-				ly > INT_MAX || rx < INT_MIN || rx > INT_MAX ||
-				ry < INT_MIN || ry > INT_MAX) {
+		if (		!isfinite(lx) || lx < INT_MIN || lx > INT_MAX ||
+				!isfinite(ly) || ly < INT_MIN || ly > INT_MAX ||
+				!isfinite(rx) || rx < INT_MIN || rx > INT_MAX ||
+				!isfinite(ry) || ry < INT_MIN || ry > INT_MAX)
+		{
 			/* do not care to clean up, we exit anyway
 			   cp->next = NULL;
 			   free_splinestorage(s);	*/
--- a/fig2dev/tests/read.at     2025-04-29 14:02:20.618400762 +0800
+++ b/fig2dev/tests/read.at     2025-04-29 14:03:13.226400762 +0800
@@ -595,6 +595,25 @@
 ])
 AT_CLEANUP

+AT_SETUP([reject nan in spline controls values, #192])
+AT_KEYWORDS([read.c])
+# Use an output language that does not natively support Bezier splines.
+# Otherwise, the huge values are simply copied to the output.
+AT_CHECK([fig2dev -L epic <<EOF
+#FIG 3.1
+Landscape
+Center
+Metric
+1200 2
+3 2 0 1 0 7 50 -1 -1 0.0 0 0 0 2
+        0 0 1200 0
+        600 600 600 nan
+        600 600 600 600
+EOF
+], 1, ignore, [Spline control points out of range at line 8.
+])
+AT_CLEANUP
+
 AT_BANNER([Dynamically allocate picture file name.])

 AT_SETUP([prepend fig file path to picture file name])