[ruby-core:100883] [Ruby master Bug#17305] rb_rescue2() seems to loop forever if given a non-module for rescued exceptions on <= 2.6.6

Issue #17305 has been updated by jeremyevans0 (Jeremy Evans).

Backport changed from 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN to 2.5: DONTNEED, 2.6: REQUIRED, 2.7: DONTNEED
Status changed from Open to Closed
File 0001-Fix-rb_rescue2-when-called-with-non-module.patch added

I bisected the fix to commit:a569bc09e25a2ba813d0bec1228d9ff65330a3db.  We definitely don't want the entire commit.  Attached is a minimal subset of the commit that doesn't introduce a new external function, in case @nagachika would like to backport it.  Closing now that a fix has been identified and the issue doesn't exist in master.

----------------------------------------
Bug #17305: rb_rescue2() seems to loop forever if given a non-module for rescued exceptions on <= 2.6.6
https://bugs.ruby-lang.org/issues/17305#change-88531

* Author: Eregon (Benoit Daloze)
* Status: Closed
* Priority: Normal
* Backport: 2.5: DONTNEED, 2.6: REQUIRED, 2.7: DONTNEED
----------------------------------------
Specifically,
```ruby
      it "raises TypeError if one of the passed exceptions is not a Module" do
        -> {
          @s.rb_rescue2(-> *_ { raise RuntimeError, "foo" }, :no_exc, -> x { x }, :exc, Object.new, 42)
        }.should raise_error(TypeError, /class or module required/)
      end
```
in
`spec/ruby/optional/capi/kernel_spec.rb`
reproduces the issue.

Ruby 2.7.0+ seems fine and raises the expected TypeError.

---Files--------------------------------
0001-Fix-rb_rescue2-when-called-with-non-module.patch (3.76 KB)


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