Bug #16186
Updated by byteit101 (Patrick Plenefisch) about 5 years ago
Using this script:
``` ruby
require 'net/http'
class Victim
def inspect
puts "before"
Net::HTTP.get('example.com', '/index.html') # this hangs. I haven't tried other network libraries
puts "After"
return "success"
end
end
puts Victim.new.inspect # for some reason this doesn't hang
puts "now we hang"
p Victim.new # but this implicit invocation of inspect does hang. Independent of ordering, and works on JRuby
puts "It worked!"
```
Expected:
```
$ rvm use jruby
$ ruby bug.rb
before
After
success
now we hang
before
After
success
It worked!
$
```
Actual:
```
$ rvm use ruby-head
$ ruby bug.rb
before
After
success
now we hang
before
^C^C^Z
[1] + 13423 suspended ruby bug.rb
$ kill %1
$ (time passes)
Traceback (most recent call last):
11: from bug.rb:12:in `<main>'
10: from bug.rb:12:in `p'
9: from bug.rb:5:in `inspect'
8: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/net/http.rb:458:in `get'
7: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/net/http.rb:476:in `get_response'
6: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/net/http.rb:919:in `start'
5: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/net/http.rb:930:in `do_start'
4: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/net/http.rb:945:in `connect'
3: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/timeout.rb:105:in `timeout'
2: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/timeout.rb:99:in `block in timeout'
1: from /home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/timeout.rb:99:in `ensure in block in timeout'
/home/byteit101/.rvm/rubies/ruby-head/lib/ruby/2.7.0/timeout.rb:99:in `join': Interrupt
[1] + 13423 interrupt ruby bug.rb /tmp/rng/koan.rb
$
```
The thing that is surprising to me is the explicit `print` + `inspect` works, whereas a straight `p` hangs.