In fldbld(), check that inputFS is set.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 9665244..a98ffee 100644
--- a/lib.c
+++ b/lib.c
@@ -332,6 +332,8 @@ void fldbld(void)	/* create fields from current record */
 	}
 	fr = fields;
 	i = 0;	/* number of fields accumulated here */
+	if (inputFS == NULL)	/* make sure we have a copy of FS */
+		savefs();
 	if (strlen(inputFS) > 1) {	/* it's a regular expression */
 		i = refldbld(r, inputFS);
 	} else if ((sep = *inputFS) == ' ') {	/* default whitespace */