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Print an error message for negative NF values

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Cody Peter Mello 2018-09-25 21:19:49 -07:00
parent 6315525dbe
commit 179536a516
4 changed files with 7 additions and 0 deletions
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2
bugs-fixed/README
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@ -25,3 +25,5 @@ and also if CONVFMT changed.
Instead, it should convert the value to numeric and give that value. Instead, it should convert the value to numeric and give that value.
X. nf-self-assign: "NF = NF" wouldn't force the record to be rebuilt. X. nf-self-assign: "NF = NF" wouldn't force the record to be rebuilt.
X. negative-nf: Setting NF to a negative value caused a segmentation fault.

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bugs-fixed/negative-nf.awk Normal file
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@ -0,0 +1 @@
BEGIN { NF = -5; }

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bugs-fixed/negative-nf.ok Normal file
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@ -0,0 +1,2 @@
./a.out: cannot set NF to a negative value
source line number 1

2
lib.c
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@ -390,6 +390,8 @@ void newfld(int n) /* add field n after end of existing lastfld */
void setlastfld(int n) /* set lastfld cleaning fldtab cells if necessary */ void setlastfld(int n) /* set lastfld cleaning fldtab cells if necessary */
{ {
if (n < 0)
FATAL("cannot set NF to a negative value");
if (n > nfields) if (n > nfields)
growfldtab(n); growfldtab(n);