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-rw-r--r--src/nvim/eval.c6
-rw-r--r--src/nvim/testdir/test69.in7
-rw-r--r--src/nvim/testdir/test69.ok4
-rw-r--r--src/nvim/version.c2
4 files changed, 16 insertions, 3 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index af41893035..80f7a65d45 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -18996,8 +18996,10 @@ char_u *do_string_sub(char_u *str, char_u *pat, char_u *sub, char_u *flags)
if (regmatch.startp[0] == regmatch.endp[0]) {
if (zero_width == regmatch.startp[0]) {
/* avoid getting stuck on a match with an empty string */
- *((char_u *)ga.ga_data + ga.ga_len) = *tail++;
- ++ga.ga_len;
+ int i = MB_PTR2LEN(tail);
+ memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
+ ga.ga_len += i;
+ tail += i;
continue;
}
zero_width = regmatch.startp[0];
diff --git a/src/nvim/testdir/test69.in b/src/nvim/testdir/test69.in
index 75317b4954..674dc32812 100644
--- a/src/nvim/testdir/test69.in
+++ b/src/nvim/testdir/test69.in
@@ -180,6 +180,13 @@ byteidx
byteidxcomp
STARTTEST
+/^substitute
+:let y = substitute('123', '\zs', 'a', 'g') | put =y
+ENDTEST
+
+substitute
+
+STARTTEST
:g/^STARTTEST/.,/^ENDTEST/d
:1;/^Results/,$wq! test.out
ENDTEST
diff --git a/src/nvim/testdir/test69.ok b/src/nvim/testdir/test69.ok
index 41cd9d02c3..af8befb0c7 100644
--- a/src/nvim/testdir/test69.ok
+++ b/src/nvim/testdir/test69.ok
@@ -160,3 +160,7 @@ byteidxcomp
[0, 1, 3, 4, -1]
[0, 1, 2, 4, 5, -1]
+
+substitute
+a1a2a3a
+
diff --git a/src/nvim/version.c b/src/nvim/version.c
index dd39070558..3311b78f49 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -226,7 +226,7 @@ static int included_patches[] = {
//326,
//325,
//324,
- //323,
+ 323,
//322,
//321,
//320,