commit 2336c376d5796446d44622b0dfa8fd3fd1a5d22b
author Bram Moolenaar <Bram@vim.org> Mon Dec 06 15:06:54 2021 +0000
committer Bram Moolenaar <Bram@vim.org> Mon Dec 06 15:06:54 2021 +0000
tree 65c5bf2e5140e7fb9f64065c5da69447b580c7c4
parent 8603be338ac810446f23c092f21bc6082f787519

patch 8.2.3753: Vim9: function unreferenced while called is never deleted

Problem:    Vim9: function unreferenced while called is never deleted.
Solution:   Delete a function when no longer referenced.

src/vim9execute.c

diff --git a/src/vim9execute.c b/src/vim9execute.c
index adfb920..f805dc0 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -4988,8 +4988,9 @@
     estack_pop();
     current_sctx = save_current_sctx;
 
-    // TODO: when is it safe to delete the function if it is no longer used?
-    --ufunc->uf_calls;
+    if (--ufunc->uf_calls <= 0 && ufunc->uf_refcount <= 0)
+	// Function was unreferenced while being used, free it now.
+	func_clear_free(ufunc, FALSE);
 
     if (*msg_list != NULL && saved_msg_list != NULL)
     {