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authornagachika <nagachika@ruby-lang.org>2024-12-15 15:28:25 +0900
committernagachika <nagachika@ruby-lang.org>2024-12-15 15:28:25 +0900
commit303a83d35c485db626c57415b344fdd4a8d0d5e5 (patch)
tree9af7d560b236290bf0418dab628558b4be22814c /spec/ruby/core/array/shared/select.rb
parentd78e1a413333bae4e70e662ac7eceb378b2a5369 (diff)
merge revision(s) 660b995365f719fa59ed6f2809bb1527e6470d14: [Backport #20915]
[Bug #20915] Fix SEGV with `TracePoint#parameters` and aliased C method The following snippet results with a SEGV: ```ruby C = Class.new do alias_method :new_to_s, :to_s end TracePoint.new(:c_call, &:parameters).enable { C.new.new_to_s } ``` at MRI 3.3.6 and ruby 3.4.0dev The root cause of the issue lies in the `rb_tracearg_parameters` function within the `RUBY_EVENT_C_RETURN` branch. Specifically, when the invoked method is an alias for a C function, `rb_method_entry_without_refinements(..., trace_arg->called_id, ...)` may return NULL. In that case we can fallback to `trace_arg->id`.
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