YJIT: Properly reject keyword splat with `yield`

We don't have support for keyword splat anywhere, but we tried to
compile these anyways in case of `invokeblock`. This led to bad things
happening such as passing the wrong value and passing a hash into
rb_yjit_array_len(), which raised in the middle of compilation.

[Bug #20192]

1 files changed, 7 insertions, 0 deletions

diff --git a/bootstraptest/test_yjit.rb b/bootstraptest/test_yjit.rb
index 5b53e8089b..a6b0f8f19c 100644
--- a/bootstraptest/test_yjit.rb
+++ b/bootstraptest/test_yjit.rb
@@ -11,6 +11,13 @@ assert_normal_exit %q{
   call_foo
 }
 
+# regression test for keyword splat with yield
+assert_equal 'nil', %q{
+  def splat_kw(kwargs) = yield(**kwargs)
+
+  splat_kw({}) { _1 }.inspect
+}
+
 # regression test for arity check with splat
 assert_equal '[:ae, :ae]', %q{
   def req_one(a_, b_ = 1) = raise