patch 9.0.0013: reproducing memory access errors can be difficult Commit: https://github.com/vim/vim/commit/fa4873ccfc10e0f278dc46f39d00136fab059b19 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 30 22:13:59 2022 +0100 patch 9.0.0013: reproducing memory access errors can be difficult Problem: Reproducing memory access errors can be difficult. Solution: When testing, copy each line to allocated memory, so that valgrind can detect accessing memory before and/or after it. Fix uncovered problems.

--- a/src/normal.c
+++ b/src/normal.c
@@ -5120,6 +5120,8 @@ n_swapchar(cmdarg_T *cap)
 			count = (int)STRLEN(ptr) - pos.col;
 			netbeans_removed(curbuf, pos.lnum, pos.col,
 								 (long)count);
+			// line may have been flushed, get it again
+			ptr = ml_get(pos.lnum);
 			netbeans_inserted(curbuf, pos.lnum, pos.col,
 							&ptr[pos.col], count);
 		    }