commit a79fd56923744e331b3a5badbf9186100818fb45
author Bram Moolenaar <Bram@vim.org> Thu Dec 20 20:47:32 2018 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Dec 20 20:47:32 2018 +0100
tree ea2f0dfa4cc226159d5917f129e42bc716f4e9bb
parent 6dc6703295362e0d4b81a3eceae6b0dd229b5d7e

patch 8.1.0611: crash when using terminal with long composing characters

Problem:    Crash when using terminal with long composing characters.
Solution:   Make space for all characters. (Yasuhiro Matsumoto, closes #3619,
            closes #3703)

src/terminal.c

diff --git a/src/terminal.c b/src/terminal.c
index 42897bf..5a01658 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -1561,7 +1561,8 @@
 
 			cell2cellattr(&cell, &p[pos.col]);
 
-			if (ga_grow(&ga, MB_MAXBYTES) == OK)
+			// Each character can be up to 6 bytes.
+			if (ga_grow(&ga, VTERM_MAX_CHARS_PER_CELL * 6) == OK)
 			{
 			    int	    i;
 			    int	    c;