commit 6eec2eb3b48870435c9d729e8cf6dac44e2c3744
Author: Pieter Kockx <[email protected]>
AuthorDate: Wed Oct 4 02:25:41 2017 +0200
Commit: Michael Forney <[email protected]>
CommitDate: Sat Oct 21 12:44:09 2017 -0700
tr: Fix infinite loop
When `makeset` got a string containing square brackets
followed by at least one extra character, e.g. "[abc]d",
it entered an infinite loop because it was assumed
`j` could not exceed `len` without having been equal to `len`.
It can, however, when `m == len` and subsequently `j = m + 1`.
diff --git a/tr.c b/tr.c
index c235215..c5dbe7e 100644
--- a/tr.c
+++ b/tr.c
@@ -85,7 +85,7 @@ makeset(char *str, struct range **set, int (**check)(Rune))
if (rstr[i] == '[') {
j = i;
nextbrack:
- if (j == len)
+ if (j >= len)
goto literal;
for (m = j; m < len; m++)
if (rstr[m] == ']') {
