From: Rene Kita <g...@rkta.de>

If K is not mapped to anything the dictionary is empty and the if clause
is false. K is then still mapped to :Evaluate. This will result in an
error E492 when using K.
---

Steps to reproduce:
- :unmap K
- :packadd termdebug
- :Termdebug
- quit
- :map K


 runtime/pack/dist/opt/termdebug/plugin/termdebug.vim | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim 
b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
index bf38dc93a..301ac7a5c 100644
--- a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
+++ b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
@@ -729,6 +729,8 @@ func s:DeleteCommands()
   if exists('s:k_map_saved') && !empty(s:k_map_saved)
     call mapset('n', 0, s:k_map_saved)
     unlet s:k_map_saved
+  else
+    nunmap K
   endif
 
   if has('menu')
-- 
2.25.1

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