commit 6f10c70b59fa4e56aa479345fb0caeaac7429bfb
author Bram Moolenaar <Bram@vim.org> Tue Aug 20 22:58:37 2019 +0200
committer Bram Moolenaar <Bram@vim.org> Tue Aug 20 22:58:37 2019 +0200
tree cdbb54c3b73a4607d8bdebb116c962bb044246f5
parent 1058c9d9b5815467182d487f10f6dd71385cb796

patch 8.1.1895: using NULL pointer when out of memory

Problem:    Using NULL pointer when out of memory.
Solution:   Bail out or skip the code using the pointer. (Zu-Ming Jiang,
            closes #4805, closes #4843, closes #4939, closes #4844)

src/ops.c

diff --git a/src/ops.c b/src/ops.c
index 7ede1f7..7b1d9ed 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -4556,6 +4556,11 @@
 
     /* allocate the space for the new line */
     newp = alloc(sumsize + 1);
+    if (newp == NULL)
+    {
+	ret = FAIL;
+	goto theend;
+    }
     cend = newp + sumsize;
     *cend = 0;