patch 8.2.2218: Vim9: failure if passing more args to lambda than expected
Problem: Vim9: failure if passing more arguments to a lambda than expected.
Solution: Only put expected arguments on the stack. (closes #7548)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 4d88991..b3abee9 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -1020,8 +1020,11 @@
ga_init2(&ectx.ec_trystack, sizeof(trycmd_T), 10);
ga_init2(&ectx.ec_funcrefs, sizeof(partial_T *), 10);
- // Put arguments on the stack.
- for (idx = 0; idx < argc; ++idx)
+ // Put arguments on the stack, but no more than what the function expects.
+ // A lambda can be called with more arguments than it uses.
+ for (idx = 0; idx < argc
+ && (ufunc->uf_va_name != NULL || idx < ufunc->uf_args.ga_len);
+ ++idx)
{
if (ufunc->uf_arg_types != NULL && idx < ufunc->uf_args.ga_len
&& check_typval_type(ufunc->uf_arg_types[idx], &argv[idx],