patch 9.0.0189: invalid memory access for text prop without highlight Commit: https://github.com/vim/vim/commit/87f3a2ca3d0ffbfa7389bbb89add4d8d3fca6fbb Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 10 20:50:23 2022 +0100 patch 9.0.0189: invalid memory access for text prop without highlight Problem: Invalid memory access for text prop without highlight. Solution: Check for a valid highlight ID.

--- a/src/highlight.c
+++ b/src/highlight.c
@@ -3504,6 +3504,7 @@ syn_unadd_group(void)
 
 /*
  * Translate a group ID to highlight attributes.
+ * "hl_id" must be valid: > 0, caller must check.
  */
     int
 syn_id2attr(int hl_id)