patch 8.0.0493: crash with cd command with very long argument
Problem: Crash with cd command with very long argument.
Solution: Check for running out of space. (Dominique pending, closes #1576)
diff --git a/src/testdir/test_cd.vim b/src/testdir/test_cd.vim
new file mode 100644
index 0000000..e573419
--- /dev/null
+++ b/src/testdir/test_cd.vim
@@ -0,0 +1,13 @@
+" Test for :cd
+
+func Test_cd_large_path()
+ " This used to crash with a heap write overflow.
+ call assert_fails('cd ' . repeat('x', 5000), 'E472:')
+endfunc
+
+func Test_cd_up_and_down()
+ let path = getcwd()
+ cd ..
+ exe 'cd ' . path
+ call assert_equal(path, getcwd())
+endfunc