patch 9.0.0873: using freed memory when executing mapclear at more prompt
Problem: Using freed memory when executing mapclear at the more prompt.
Solution: Do not clear mappings while listing them. (closes #11438)
diff --git a/src/testdir/test_mapping.vim b/src/testdir/test_mapping.vim
index f8e5a31..4d5b202 100644
--- a/src/testdir/test_mapping.vim
+++ b/src/testdir/test_mapping.vim
@@ -1774,5 +1774,29 @@
nunmap :00
endfunc
+func Test_mapclear_while_listing()
+ CheckRunVimInTerminal
+
+ let lines =<< trim END
+ set nocompatible
+ mapclear
+ for i in range(1, 999)
+ exe 'map ' .. 'foo' .. i .. ' bar'
+ endfor
+ au CmdlineLeave : call timer_start(0, {-> execute('mapclear')})
+ END
+ call writefile(lines, 'Xmapclear', 'D')
+ let buf = RunVimInTerminal('-S Xmapclear', {'rows': 10})
+
+ " this was using freed memory
+ call term_sendkeys(buf, ":map\<CR>")
+ call TermWait(buf, 50)
+ call term_sendkeys(buf, "G")
+ call TermWait(buf, 50)
+ call term_sendkeys(buf, "\<CR>")
+
+ call StopVimInTerminal(buf)
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab