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-rw-r--r--src/nvim/lua/stdlib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/lua/stdlib.c b/src/nvim/lua/stdlib.c
index 5072d14c0e..a200b0a32f 100644
--- a/src/nvim/lua/stdlib.c
+++ b/src/nvim/lua/stdlib.c
@@ -224,7 +224,7 @@ static int nlua_str_utf_start(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL
if (offset < 0 || offset > (intptr_t)s1_len) {
return luaL_error(lstate, "index out of range");
}
- int head_offset = utf_cp_head_off(s1, s1 + offset - 1);
+ int head_offset = -utf_cp_head_off(s1, s1 + offset - 1);
lua_pushinteger(lstate, head_offset);
return 1;
}