commit 787880a86dbcb79cdf6e8241b1d99ac4a7acbc09
author Bram Moolenaar <Bram@vim.org> Fri May 17 20:17:40 2019 +0200
committer Bram Moolenaar <Bram@vim.org> Fri May 17 20:17:40 2019 +0200
tree 3c486f6ec9d5f45e52c2b6b26df957a9723bf951
parent 80e737cc6ab6b68948f6765348b6881be861b200

patch 8.1.1342: using freed memory when joining line with text property

Problem:    Using freed memory when joining line with text property.
Solution:   Use already computed length.

src/ops.c

diff --git a/src/ops.c b/src/ops.c
index d77aa2e..489c473 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -4635,7 +4635,7 @@
     {
 	/* Set the '] mark. */
 	curwin->w_buffer->b_op_end.lnum = curwin->w_cursor.lnum;
-	curwin->w_buffer->b_op_end.col  = (colnr_T)STRLEN(newp);
+	curwin->w_buffer->b_op_end.col  = (colnr_T)sumsize;
     }
 
     /* Only report the change in the first line here, del_lines() will report