commit 069dafc1ded60d9ee0fee4bcecce78ac8a235d87
author Bram Moolenaar <Bram@vim.org> Sat Mar 03 20:02:19 2018 +0100
committer Bram Moolenaar <Bram@vim.org> Sat Mar 03 20:02:19 2018 +0100
tree bf218ed98ca113eb8d3c818c3107e44b4089b7b7
parent 3767b61ad99fe6ff2cace2dccb5d35331786735f

patch 8.0.1561: crash with rust syntax highligting

Problem:    Crash with rust syntax highligting. (Edd Barrett)
Solution:   Avoid going past the end of an empty line.

src/syntax.c

diff --git a/src/syntax.c b/src/syntax.c
index 81f4604..d0d4515 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -2470,7 +2470,8 @@
 
     /* nextgroup ends at end of line, unless "skipnl" or "skipempty" present */
     if (current_next_list != NULL
-	    && syn_getcurline()[current_col + 1] == NUL
+	    && (line = syn_getcurline())[current_col] != NUL
+	    && line[current_col + 1] == NUL
 	    && !(current_next_flags & (HL_SKIPNL | HL_SKIPEMPTY)))
 	current_next_list = NULL;