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-rw-r--r--Src/math.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/Src/math.c b/Src/math.c
index f8a4eefeb..a2462a32e 100644
--- a/Src/math.c
+++ b/Src/math.c
@@ -362,8 +362,9 @@ mathevall(char *s, enum prec_type prec_tp, char **ep)
     if (mlevel >= MAX_MLEVEL) {
 	xyyval.type = MN_INTEGER;
 	xyyval.u.l = 0;
+	*ep = s;
 
-	zerr("math recursion limit exceeded");
+	zerr("math recursion limit exceeded: %s", *ep);
 
 	return xyyval;
     }