* [ruby-core:121629] [Ruby Bug#21265] Crash when proc from Symbol#to_proc called outside refinement scope
@ 2025-04-11 9:39 alanwu (Alan Wu) via ruby-core
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From: alanwu (Alan Wu) via ruby-core @ 2025-04-11 9:39 UTC (permalink / raw)
To: ruby-core; +Cc: alanwu (Alan Wu)
Issue #21265 has been reported by alanwu (Alan Wu).
----------------------------------------
Bug #21265: Crash when proc from Symbol#to_proc called outside refinement scope
https://bugs.ruby-lang.org/issues/21265
* Author: alanwu (Alan Wu)
* Status: Open
* ruby -v: ruby 3.4.2 and trunk
* Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED
----------------------------------------
```ruby
class RefinedScope
using(Module.new { refine(Kernel) { def itself = 0 } })
ITSELF = :itself.to_proc
end
RefinedScope::ITSELF[0]
```
```
../vm_method.c:1371: Assertion Failed: prepare_callable_method_entry:RB_TYPE_2_P(defined_class, RUBY_T_ICLASS, RUBY_T_MODULE): defined_class: T_FALSE
```
Or SEGV without `-DRUBY_DEBUG`.
--
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