fix(statusline): don't leak memory with zero-width click labels

A zero-width click label isn't assigned to any click definition, so its
function name should be freed when filling click definitions.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/functional/ui/statusline_spec.lua b/test/functional/ui/statusline_spec.lua
index 549ebbde06..26a34f6d14 100644
--- a/test/functional/ui/statusline_spec.lua
+++ b/test/functional/ui/statusline_spec.lua
@@ -164,6 +164,16 @@ describe('statusline clicks', function()
     meths.input_mouse('right', 'press', '', 0, 6, 5)
     eq('0 1 r', eval("g:testvar"))
   end)
+
+  it('no memory leak with zero-width click labels', function()
+    command([[
+      let &stl = '%@Test@%T%@MyClickFunc@%=%T%@Test@'
+    ]])
+    meths.input_mouse('left', 'press', '', 0, 6, 0)
+    eq('0 1 l', eval("g:testvar"))
+    meths.input_mouse('right', 'press', '', 0, 6, 39)
+    eq('0 1 r', eval("g:testvar"))
+  end)
 end)
 
 describe('global statusline', function()