Raise when loading unprovided builtin function [Bug #17192]

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 78be07dc78..e3ca1ba926 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -590,6 +590,21 @@ class TestISeq < Test::Unit::TestCase
     assert_equal([:func_ptr, :argc, :index, :name], invokebuiltin[1].keys)
   end
 
+  def test_iseq_builtin_load
+    Tempfile.create(["builtin", ".iseq"]) do |f|
+      f.binmode
+      f.write(RubyVM::InstructionSequence.of(1.method(:abs)).to_binary)
+      f.close
+      assert_separately(["-", f.path], "#{<<~"begin;"}\n#{<<~'end;'}")
+      begin;
+        bin = File.binread(ARGV[0])
+        assert_raise(ArgumentError) do
+          RubyVM::InstructionSequence.load_from_binary(bin)
+        end
+      end;
+    end
+  end
+
   def test_iseq_option_debug_level
     assert_raise(TypeError) {ISeq.compile("", debug_level: "")}
     assert_ruby_status([], "#{<<~"begin;"}\n#{<<~'end;'}")