[ruby-dev:51032] [Ruby master Bug#17494] ruby is hanged when using activesupport + rspec + rspec-parameterized

[merch-redmine@jeremyevans.net]

Issue #17494 has been updated by jeremyevans0 (Jeremy Evans).


One possible workaround for this is a checking for an immediate loop in `resolve_refined_method`:

```diff
diff --git a/vm_method.c b/vm_method.c
index 2573e708ba..ebfe686a27 100644
--- a/vm_method.c
+++ b/vm_method.c
@@ -1245,7 +1245,7 @@ resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, VALUE *de
 {
     while (me && me->def->type == VM_METHOD_TYPE_REFINED) {
        VALUE refinement;
-        const rb_method_entry_t *tmp_me;
+        const rb_method_entry_t *tmp_me, *prev_me = me;
         VALUE super;

        refinement = find_refinement(refinements, me->owner);
@@ -1269,6 +1269,9 @@ resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, VALUE *de
         }

         me = search_method_protect(super, me->called_id, defined_class_ptr);
+        if (me == prev_me) {
+            return 0;
+        }
     }
     return me;
 }
```

This fixes the case in the example, but maybe there are other more complex cases that it wouldn't catch.  However, even if it won't catch all cases, until we have solved the underlying issue, this seems like a reasonable thing to add.  I can submit a pull request for this if other committers are in favor.

----------------------------------------
Bug #17494: ruby is hanged when using activesupport + rspec + rspec-parameterized
https://bugs.ruby-lang.org/issues/17494#change-90873

* Author: sue445 (Go Sueyoshi)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.0p0
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
# Example code
## Gemfile
```ruby
# frozen_string_literal: true

source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }

gem "activesupport", "6.1.0"
gem "rspec", "3.10.0"
gem "rspec-parameterized", "0.4.2"
```

## spec file
``` ruby
require "active_support/all"
require "rspec-parameterized"

describe "CLI" do
  subject do
    # Expected error, but actual hunged here
    cli.foo # <- hunged here
  end

  it { expect { subject }.to raise_error }
end

xdescribe "GitlabMrRelease::Project" do
  describe "#api_version" do
    using RSpec::Parameterized::TableSyntax

    where(:api_endpoint, :expected) do
      "http://example.com/api/v4/" | 4
    end

    with_them do
      # it { should eq expected }
    end
  end
end
```

all codes are here.

https://github.com/sue445/ruby_3_0_0_bug_report_20201231

# Expected
spec is successful (This is the behavior up to ruby 2.7.2)

# Actual
hunged at line 7





-- 
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