From 5fbbc83b2b8aa7d2f13c72467b43c6c71d01f388 Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Tue, 27 Jan 2004 04:52:09 +0000 Subject: [PATCH] (Freplace_match): Handle nonexistent back-references properly. --- src/search.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/src/search.c b/src/search.c index 020573b75a1..c60d68b9374 100644 --- a/src/search.c +++ b/src/search.c @@ -2366,13 +2366,21 @@ since only regular expressions have distinguished subexpressions. */) substart = search_regs.start[sub]; subend = search_regs.end[sub]; } - else if (c >= '1' && c <= '9' && c <= search_regs.num_regs + '0') + else if (c >= '1' && c <= '9') { - if (search_regs.start[c - '0'] >= 0) + if (search_regs.start[c - '0'] >= 0 + && c <= search_regs.num_regs + '0') { substart = search_regs.start[c - '0']; subend = search_regs.end[c - '0']; } + else + { + /* If that subexp did not match, + replace \\N with nothing. */ + substart = 0; + subend = 0; + } } else if (c == '\\') delbackslash = 1; -- 2.39.2