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diff -urpN busybox-1.15.2/findutils/grep.c busybox-1.15.2-grep/findutils/grep.c
--- busybox-1.15.2/findutils/grep.c 2009-09-26 15:14:57.000000000 +0200
+++ busybox-1.15.2-grep/findutils/grep.c 2009-12-04 02:46:43.000000000 +0100
@@ -377,6 +377,8 @@ static int grep_file(FILE *file)
print_line(line + gl->matched_range.rm_so,
end - gl->matched_range.rm_so,
linenum, ':');
+ if (old == '\0')
+ break;
line[end] = old;
#if !ENABLE_EXTRA_COMPAT
if (regexec(&gl->compiled_regex, line + end,
diff -urpN busybox-1.15.2/testsuite/grep.tests busybox-1.15.2-grep/testsuite/grep.tests
--- busybox-1.15.2/testsuite/grep.tests 2009-09-26 15:14:57.000000000 +0200
+++ busybox-1.15.2-grep/testsuite/grep.tests 2009-12-04 02:46:43.000000000 +0100
@@ -90,4 +90,9 @@ testing "grep -E -o prints all matches"
"00:19:3E:00:AA:5E\n00:1D:60:3D:3A:FB\n00:22:43:49:FB:AA\n" \
"" "00:19:3E:00:AA:5E 00:1D:60:3D:3A:FB 00:22:43:49:FB:AA\n"
+testing "grep -o does not loop forever" \
+ 'grep -o "[^/]*$"' \
+ "test\n" \
+ "" "/var/test\n"
+
exit $FAILCOUNT
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