From ad5ccd2d6191cc6fd53c0faf4c3d0a4b2b75b052 Mon Sep 17 00:00:00 2001
From: h_vogt <h_vogt>
Date: Thu, 25 May 2017 12:16:06 +0200
Subject: [PATCH] plotit.c, check for infinite y values

---
 src/frontend/plotting/plotit.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/frontend/plotting/plotit.c b/src/frontend/plotting/plotit.c
index 1f576cc2f..36c7ab503 100644
--- a/src/frontend/plotting/plotit.c
+++ b/src/frontend/plotting/plotit.c
@@ -866,6 +866,11 @@ plotit(wordlist *wl, char *hcopy, char *devname)
         goto quit;
     }
 
+    if(isinf(ylims[0]) || isinf(ylims[1])) {
+        fprintf(cp_err, "Error: Y values must not be infinite\n");
+        goto quit;
+    }
+
     /* Fix the plot limits for smith and polar grids. */
     if ((!xlim || !ylim) && (gtype == GRID_POLAR)) {
         double mx, my, rad;