From c6eab64cf55d91886c18c9fbb5ff564290759ed2 Mon Sep 17 00:00:00 2001
From: "Andrew J. Schorr" <aschorr@telemetry-investments.com>
Date: Wed, 20 Oct 2021 09:09:19 -0400
Subject: Fix SEGV in error message when FNR hasn't been set yet.

---
 msg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'msg.c')

diff --git a/msg.c b/msg.c
index 0dc3f718..2ec3dfa9 100644
--- a/msg.c
+++ b/msg.c
@@ -78,7 +78,7 @@ err(bool isfatal, const char *s, const char *emsg, va_list argp)
 	}
 
 #ifdef HAVE_MPFR
-	if (FNR_node && is_mpg_number(FNR_node->var_value)) {
+	if (FNR_node && FNR_node->var_value && is_mpg_number(FNR_node->var_value)) {
 		NODE *val;
 		val = mpg_update_var(FNR_node);
 		assert((val->flags & MPZN) != 0);
-- 
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