From 0cab608d3a7791c229eea2ebe276494f063c8176 Mon Sep 17 00:00:00 2001 From: Masataka Pocke Kuwabara Date: Fri, 14 Feb 2025 16:31:58 +0900 Subject: [Bug #21127] Thread deadlock does not display backtraces (#12721) Previously, Ruby displayed backtraces for each thread on deadlock. However, it has not been shown since Ruby 3.0. It should display the backtrace for debugging. Co-authored-by: Jeremy Evans --- test/ruby/test_thread.rb | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'test/ruby') diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb index 19f39705bd..7784e0bdae 100644 --- a/test/ruby/test_thread.rb +++ b/test/ruby/test_thread.rb @@ -1553,4 +1553,36 @@ q.pop assert_equal(true, t.pending_interrupt?(Exception)) assert_equal(false, t.pending_interrupt?(ArgumentError)) end + + def test_deadlock_backtrace + bug21127 = '[ruby-core:120930] [Bug #21127]' + + expected_stderr = [ + /-:12:in 'Thread#join': No live threads left. Deadlock\? \(fatal\)\n/, + /2 threads, 2 sleeps current:\w+ main thread:\w+\n/, + /\* #\n/, + :*, + /^\s*-:6:in 'Object#frame_for_deadlock_test_2'/, + :*, + /\* #\n/, + :*, + /^\s*-:2:in 'Object#frame_for_deadlock_test_1'/, + :*, + ] + + assert_in_out_err([], <<-INPUT, [], expected_stderr, bug21127) + def frame_for_deadlock_test_1 + yield + end + + def frame_for_deadlock_test_2 + yield + end + + q = Thread::Queue.new + t = Thread.new { frame_for_deadlock_test_1 { q.pop } } + + frame_for_deadlock_test_2 { t.join } + INPUT + end end -- cgit v1.2.3