vim-patch:8.0.1228: invalid memory access in GUI test

Problem:    Invalid memory access in GUI test.
Solution:   Check that the row is not outside of the screen.
https://github.com/vim/vim/commit/0e19fc07e73214f94441cb3a495504a1de21eb07

1 files changed, 5 insertions, 1 deletions

diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 092820321c..36901e92ee 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -1448,7 +1448,11 @@ static void win_update(win_T *wp)
 
       wp->w_lines[idx].wl_lnum = lnum;
       wp->w_lines[idx].wl_valid = true;
-      if (row > wp->w_height) {         // past end of screen
+
+      // Past end of the window or end of the screen. Note that after
+      // resizing wp->w_height may be end up too big. That's a problem
+      // elsewhere, but prevent a crash here.
+      if (row > wp->w_height || row + wp->w_winrow >= Rows) {
         // we may need the size of that too long line later on
         if (dollar_vcol == -1) {
           wp->w_lines[idx].wl_size = plines_win(wp, lnum, true);