commit d3a117814d6acbf0dca3eff1a7626843b9b3734a
author Bram Moolenaar <Bram@vim.org> Wed Jan 05 16:50:40 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Wed Jan 05 16:50:40 2022 +0000
tree 0073cd30b677362a3936829903068b3400cdf511
parent 677658ae49de31fe2e5b1fa6d93fdfab85a4362e

patch 8.2.4009: reading one byte beyond the end of the line

Problem:    Reading one byte beyond the end of the line.
Solution:   Check for NUL byte first.

src/vim9compile.c

diff --git a/src/vim9compile.c b/src/vim9compile.c
index cccf02c..f1a6a03 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -2781,7 +2781,8 @@
 	cmd = ea.cmd;
 	if ((*cmd != '$' || starts_with_colon)
 		&& (starts_with_colon || !(*cmd == '\''
-		       || (cmd[0] == cmd[1] && (*cmd == '+' || *cmd == '-')))))
+		       || (cmd[0] != NUL && cmd[0] == cmd[1]
+					    && (*cmd == '+' || *cmd == '-')))))
 	{
 	    ea.cmd = skip_range(ea.cmd, TRUE, NULL);
 	    if (ea.cmd > cmd)