From a98deec0303cbe96a596d519f734f8fa123b17cb Mon Sep 17 00:00:00 2001
From: Charles Karney <charles@karney.com>
Date: Fri, 23 Mar 2018 10:41:27 -0400
Subject: geodtest.c, checkNaN: print arg on failure.

---
 src/geodtest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/geodtest.c b/src/geodtest.c
index ec2a0dde..0ee86d5c 100644
--- a/src/geodtest.c
+++ b/src/geodtest.c
@@ -32,7 +32,7 @@ static int checkEquals(double x, double y, double d) {
 static int checkNaN(double x) {
   if (x != x)
     return 0;
-  printf("checkNaN fails\n");
+  printf("checkNaN fails: %.7g\n", x);
   return 1;
 }
 
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