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MFC r305365

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The bug:
$ echo x | awk '/[[:cntrl:]]/'
x

The NUL character in cntrl class truncates the pattern, and an empty
pattern matches anything. The patch skips NUL as a quick fix.

PR:     195792
Submitted by:   kdrakehp@zoho.com
Approved by:    bwk@cs.princeton.edu (the author)
This commit is contained in:
ache 2016-09-06 00:32:33 +00:00
parent 6da7f85311
commit ca95b01236
1 changed files with 1 additions and 1 deletions
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2
contrib/one-true-awk/b.c
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@ -841,7 +841,7 @@ int relex(void) /* lexical analyzer for reparse */
if (cc->cc_name != NULL && prestr[1 + cc->cc_namelen] == ':' &&
prestr[2 + cc->cc_namelen] == ']') {
prestr += cc->cc_namelen + 3;
for (i = 0; i < NCHARS; i++) {
for (i = 1; i < NCHARS; i++) {
if (!adjbuf((char **) &buf, &bufsz, bp-buf+1, 100, (char **) &bp, "relex2"))
FATAL("out of space for reg expr %.10s...", lastre);
if (cc->cc_func(i)) {