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Diffstat (limited to 'src/grep/tests/repetition-overflow')
| -rwxr-xr-x | src/grep/tests/repetition-overflow | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/grep/tests/repetition-overflow b/src/grep/tests/repetition-overflow new file mode 100755 index 0000000..38a652d --- /dev/null +++ b/src/grep/tests/repetition-overflow @@ -0,0 +1,19 @@ +#!/bin/sh +# These would fail (i.e., match erroneously) prior to grep-2.11. +. "${srcdir=.}/init.sh"; path_prepend_ ../src + +xp1=4294967297 # 2^32+1 +xp2=4294967298 # 2^32+2 + +fail=0 + +# Before grep-2.11, when DFA-matching, a repetition count exceeding the +# range of "unsigned int" would silently wrap around. Hence, 2^32+1 +# would be treated just like "1", and both of these would mistakenly match. + +echo abc | returns_ 2 grep -E "b{$xp1}" > out 2> /dev/null || fail=1 +compare /dev/null out || fail=1 +echo abbc | returns_ 2 grep -E "b{1,$xp2}" > out 2> /dev/null || fail=1 +compare /dev/null out || fail=1 + +Exit $fail |