From: deivid.rodriguez@... Date: 2014-03-30T16:32:55+00:00 Subject: [ruby-core:61769] [ruby-trunk - Bug #9321] rb_mod_const_missing does not generate a c-return event Issue #9321 has been updated by David Rodr��guez. Hi @koichi, I'm still running into this issue... :( I really don't know what's going on, because the tests pass in ruby's test suite, but the `c_return` event is not generated when I use the TracePoint API. require 'minitest/autorun' class TestTracePoint < Minitest::Test def test_method_missing events = [] assert !respond_to?(:missing_method_59398) TracePoint.new(:c_call, :c_return, :call, :return) { |tp| events << [tp.event, tp.method_id] if tp.method_id == :method_missing }.enable { missing_method_59398 rescue nil } assert_equal([[:c_call, :method_missing], [:c_return, :method_missing]], events) end end $ ruby --version ruby 2.1.1p76 (2014-02-24 revision 45161) [i686-linux] $ ruby test_tracepoint.rb Run options: --seed 31045 # Running: F Finished in 0.035420s, 28.2322 runs/s, 56.4645 assertions/s. 1) Failure: TestTracePoint#test_method_missing [test_tracepoint.rb:12]: --- expected +++ actual @@ -1 +1 @@ -[[:c_call, :method_missing], [:c_return, :method_missing]] +[[:c_call, :method_missing]] 1 runs, 2 assertions, 1 failures, 0 errors, 0 skips Also I have a couple of failing tests in byebug's test suite because of this. https://travis-ci.org/deivid-rodriguez/byebug/jobs/21874423 Thanks a lot. ---------------------------------------- Bug #9321: rb_mod_const_missing does not generate a c-return event https://bugs.ruby-lang.org/issues/9321#change-46007 * Author: Stefan Kaes * Status: Closed * Priority: Normal * Assignee: * Category: core * Target version: * ruby -v: ruby 2.1.0p1 (2013-12-26 revision 44431) [x86_64-darwin12.0] * Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN ---------------------------------------- We have had an issue reported for ruby-prof where execution times were attributed incorrectly in the call graph. It turned out that the problem is caused by a missing c-return event for Module#const_missing. ruby-prof simulates the ruby call stack by subscribing to line, call, c-call, return and c-return events. Obviously, the missing return throws ruby-prof off the track. ---Files-------------------------------- rb_mod_const_missing.patch (643 Bytes) rb_mod_const_missing_with_tests.patch (1.48 KB) rb_mod_const_missing_with_tests_redefined.patch (3.01 KB) -- https://bugs.ruby-lang.org/