[hackers] [sbase][PATCH] Stop matching when lastmatch points to '\n'

[Roberto E. Vargas Caballero]

This situation happens with something like s/$/test/,
where rm_so == rm_eo == 0. Without this check, ed
keeps looping forever.
---
 ed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ed.c b/ed.c
index 69c7422..9dc6fda 100644
--- a/ed.c
+++ b/ed.c
@@ -1007,7 +1007,7 @@ subline(int num, int nth)
        static size_t siz, cap;
 
        i = changed = siz = 0;
-       for (m = match(num); m; m = rematch(num)) {
+       for (m = match(num); m && *lastmatch != '\n'; m = rematch(num)) {
                addpre(&s, &cap, &siz);
                changed |= addsub(&s, &cap, &siz, nth, ++i);
        }
-- 
2.1.4