patch 9.0.0550: crash when closing a tabpage and buffer is NULL
Problem: Crash when closing a tabpage and buffer is NULL.
Solution: Adjust how autocommands are triggered when closing a window.
(closes #11198, closes #11197)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 17bfd1b..3c95f87 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -515,6 +515,26 @@
augroup! test-WinClosed
endfunc
+" This used to trigger WinClosed twice for the same window, and the window's
+" buffer was NULL in the second autocommand.
+func Test_WinClosed_switch_tab()
+ edit Xa
+ split Xb
+ split Xc
+ tab split
+ new
+ augroup test-WinClosed
+ autocmd WinClosed * tabprev | bwipe!
+ augroup END
+ close
+ " Check that the tabline has been fully removed
+ call assert_equal([1, 1], win_screenpos(0))
+
+ autocmd! test-WinClosed
+ augroup! test-WinClosed
+ %bwipe!
+endfunc
+
func s:AddAnAutocmd()
augroup vimBarTest
au BufReadCmd * echo 'hello'