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authorTakashi Kokubun <takashikkbn@gmail.com>2025-01-14 17:51:27 -0800
committerTakashi Kokubun <takashikkbn@gmail.com>2025-01-14 17:51:27 -0800
commit745fe4cf7e0c297879b46045a4838b3e5e2dfeb9 (patch)
tree47b6ea47ad8b24d919f32b7ccef037f53b0475b1 /test/ruby/test_variable.rb
parent1e48631e0f318a3b73cd39bdbda4619017383aac (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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