From 52a3c2726ef9dc2c350fe761e41bf8e02444392e Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Tue, 23 Dec 2003 08:53:51 +0000
Subject: Patch from Matt Kraai:

sed is broken:

 busybox sed -n '/^a/,/^a/p' >output <<EOF
 a
 b
 a
 b
 EOF
 cmp -s output - <<EOF
 a
 b
 a
 EOF

The attached patch fixes it.
---
 editors/sed.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/editors/sed.c b/editors/sed.c
index 4552af6c3..5f58fe27a 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -746,7 +746,9 @@ static void process_file(FILE * file)
 restart:
 		/* for every line, go through all the commands */
 		for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
-			int matched;
+			int old_matched, matched;
+
+			old_matched = sed_cmd->in_match;
 
 			/* Determine if this command matches this line: */
 
@@ -783,7 +785,7 @@ restart:
 							: sed_cmd->end_line<=linenum
 						: !sed_cmd->end_match)
 					/* or does this line matches our last address regex */
-					|| (sed_cmd->end_match && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
+					|| (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, pattern_space, 0, NULL, 0) == 0))
 				);
 			}
 
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