* bug? continuation called across trap
@ 2006-08-28 17:43 Young Hyun
2006-08-29 1:49 ` nobu
0 siblings, 1 reply; 2+ messages in thread
From: Young Hyun @ 2006-08-28 17:43 UTC (permalink / raw
To: ruby-core
I posted this on ruby-talk but didn't get any replies. Hopefully
someone on ruby-core can help.
Does anyone know what the rather mysterious error "continuation
called across trap" means? It's triggered when I use SyncEnumerator
in a multithreaded script. I don't believe I'm doing anything
obviously wrong with threads, but this error disappears if I don't
use threads. Furthermore, the error seems to occur when I use irb
but not ruby (?? I need to verify this). I'm suspecting there might
be a bug in irb. Code to reproduce the problem is below. Note,
also, that the problem disappears if you remove the use of
@values.find--that is, if you call SyncEnumerator.each directly in
the lambda.
--Young
=============================================
require 'thread'
require 'generator'
class Region
def initialize
@values = []
@work_queue = Queue.new
@thread = Thread.new do
loop do
@work_queue.deq.call
end
end
end
def add(value)
@work_queue << lambda do
@values << value
end
end
def find(template)
@work_queue << lambda do
@values.find do |value|
SyncEnumerator.new(template, value).each do |lhs, rhs|
puts "checking: #{lhs.inspect} === #{rhs.inspect}"
end
end
end
end
end
Thread.abort_on_exception = true
reg = Region.new
reg.add [1,1]
reg.add [1,2]
reg.add [1,3]
reg.find [1,2]
#sleep 10 # uncommenting this somehow prevents the error
=============================================
MacOS X 10.4.7
$ ruby --version
ruby 1.8.4 (2005-12-24) [powerpc-darwin8.5.0]
$ irb --prompt-mode simple
>> load 'Fail4.rb'
checking: 1 === 1=> true
>>
/opt/local/lib/ruby/1.8/generator.rb:132:in `call': continuation
called across trap (RuntimeError)
from /opt/local/lib/ruby/1.8/generator.rb:132:in `next'
from /opt/local/lib/ruby/1.8/generator.rb:225:in `each'
from /opt/local/lib/ruby/1.8/generator.rb:220:in `each'
from /opt/local/lib/ruby/1.8/generator.rb:217:in `each'
from ./Fail4.rb:25:in `find'
from ./Fail4.rb:2:in `find'
from ./Fail4.rb:24:in `find'
from ./Fail4.rb:11:in `initialize'
from ./Fail4.rb:10:in `initialize'
from ./Fail4.rb:9:in `initialize'
from ./Fail4.rb:36
from (irb):1:in `irb_binding'
from /opt/local/lib/ruby/1.8/irb/workspace.rb:52:in
`irb_binding'
from /opt/local/lib/ruby/1.8/irb/workspace.rb:52
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: bug? continuation called across trap
2006-08-28 17:43 bug? continuation called across trap Young Hyun
@ 2006-08-29 1:49 ` nobu
0 siblings, 0 replies; 2+ messages in thread
From: nobu @ 2006-08-29 1:49 UTC (permalink / raw
To: ruby-core
Hi,
At Tue, 29 Aug 2006 02:43:48 +0900,
Young Hyun wrote in [ruby-core:08743]:
> Does anyone know what the rather mysterious error "continuation
> called across trap" means? It's triggered when I use SyncEnumerator
> in a multithreaded script. I don't believe I'm doing anything
> obviously wrong with threads, but this error disappears if I don't
> use threads. Furthermore, the error seems to occur when I use irb
> but not ruby (?? I need to verify this). I'm suspecting there might
> be a bug in irb. Code to reproduce the problem is below. Note,
> also, that the problem disappears if you remove the use of
> @values.find--that is, if you call SyncEnumerator.each directly in
> the lambda.
No error on Linux. Maybe the issue around libedit on Mac OS X.
--
Nobu Nakada
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