patch 8.1.0555: crash when last search pat is set but not last substitute pat commit https://github.com/vim/vim/commit/2fb8f684d888ad68b283ba8f9505106b5fb725be Author: Bram Moolenaar <Bram@vim.org> Date: Sat Dec 1 13:14:45 2018 +0100 patch 8.1.0555: crash when last search pat is set but not last substitute pat Problem: Crash when last search pat is set but not last substitute pat. Solution: Do not mix up last search pattern and last subtitute pattern. (closes #3647)

--- a/src/search.c
+++ b/src/search.c
@@ -1385,7 +1385,7 @@ do_search(
 	    char_u	*trunc;
 
 	    if (*searchstr == NUL)
-		p = spats[last_idx].pat;
+		p = spats[0].pat;
 	    else
 		p = searchstr;
 	    msgbuf = alloc((unsigned)(STRLEN(p) + 40));