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@@ -1,80 +0,0 @@
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---- busybox-1.22.0/findutils/grep.c
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-+++ busybox-1.22.0-grep/findutils/grep.c
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-@@ -373,6 +373,9 @@ static int grep_file(FILE *file)
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- opt_f_not_found: ;
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- }
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- } else {
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-+#if ENABLE_EXTRA_COMPAT
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-+ unsigned start_pos;
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-+#endif
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- char *match_at;
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-
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- if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
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-@@ -389,15 +392,18 @@ static int grep_file(FILE *file)
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- #if !ENABLE_EXTRA_COMPAT
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- gl->matched_range.rm_so = 0;
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- gl->matched_range.rm_eo = 0;
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-+#else
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-+ start_pos = 0;
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- #endif
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- match_at = line;
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- opt_w_again:
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-+//bb_error_msg("'%s' start_pos:%d line_len:%d", match_at, start_pos, line_len);
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- if (
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- #if !ENABLE_EXTRA_COMPAT
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- regexec(&gl->compiled_regex, match_at, 1, &gl->matched_range, 0) == 0
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- #else
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- re_search(&gl->compiled_regex, match_at, line_len,
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-- /*start:*/ 0, /*range:*/ line_len,
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-+ start_pos, /*range:*/ line_len,
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- &gl->matched_range) >= 0
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- #endif
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- ) {
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-@@ -416,8 +422,24 @@ static int grep_file(FILE *file)
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- if (!c || (!isalnum(c) && c != '_')) {
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- found = 1;
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- } else {
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-- match_at += gl->matched_range.rm_eo;
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-- goto opt_w_again;
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-+ /*
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-+ * Why check gl->matched_range.rm_eo?
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-+ * Zero-length match makes -w skip the line:
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-+ * "echo foo | grep ^" prints "foo",
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-+ * "echo foo | grep -w ^" prints nothing.
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-+ * Without such check, we can loop forever.
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-+ */
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-+#if !ENABLE_EXTRA_COMPAT
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-+ if (gl->matched_range.rm_eo != 0) {
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-+ match_at += gl->matched_range.rm_eo;
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-+ goto opt_w_again;
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-+ }
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-+#else
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-+ if (gl->matched_range.rm_eo > start_pos) {
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-+ start_pos = gl->matched_range.rm_eo;
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-+ goto opt_w_again;
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-+ }
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-+#endif
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- }
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- }
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- }
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---- busybox-1.22.0/testsuite/grep.tests
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-+++ busybox-1.22.0-grep/testsuite/grep.tests
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-@@ -147,6 +147,18 @@ testing "grep -w doesn't stop on 1st mis
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- "foop foo\n" \
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- ""
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-
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-+testing "grep -w ^str doesn't match str not at the beginning" \
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-+ "grep -w ^str input" \
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-+ "" \
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-+ "strstr\n" \
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-+ ""
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-+
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-+testing "grep -w ^ doesn't hang" \
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-+ "grep -w ^ input" \
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-+ "" \
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-+ "anything\n" \
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-+ ""
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-+
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- # testing "test name" "commands" "expected result" "file input" "stdin"
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- # file input will be file called "input"
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- # test can create a file "actual" instead of writing to stdout
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