1 files changed, 15 insertions, 0 deletions
diff --git a/test/functional/eval/let_spec.lua b/test/functional/eval/let_spec.lua
index f8fcdfd41f..5bc703b567 100644
--- a/test/functional/eval/let_spec.lua
+++ b/test/functional/eval/let_spec.lua
@@ -75,4 +75,19 @@ describe(':let', function()
     command(cmd_get_child_env)
     eq(eval('$NVIM_TEST'), eval('g:env_from_child'))
   end)
+
+  it("release of list assigned to l: variable does not trigger assertion #12387, #12430", function()
+    source([[
+      func! s:f()
+        let l:x = [1]
+        let g:x = l:
+      endfunc
+      for _ in range(2)
+        call s:f()
+      endfor
+      call garbagecollect()
+      call feedkeys('i', 't')
+    ]])
+    eq(1, eval('1'))
+  end)
 end)