proc.c: fix infinite loop

* proc.c (rb_proc_get_iseq): proc made from symbol does not have
  iseq.  fix infinite loop.  [ruby-core:72381] [Bug #11845]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53206 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index 94541865f2..8960bec0d1 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -164,6 +164,18 @@ class TestSymbol < Test::Unit::TestCase
     end;
   end
 
+  def test_to_proc_iseq
+    assert_separately([], <<~"end;", timeout: 1) # do
+      bug11845 = '[ruby-core:72381] [Bug #11845]'
+      assert_nil(:class.to_proc.source_location, bug11845)
+      assert_equal([[:rest]], :class.to_proc.parameters, bug11845)
+      c = Class.new {define_method(:klass, :class.to_proc)}
+      m = c.instance_method(:klass)
+      assert_nil(m.source_location, bug11845)
+      assert_equal([[:rest]], m.parameters, bug11845)
+    end;
+  end
+
   def test_call
     o = Object.new
     def o.foo(x, y); x + y; end