* [ruby-core:90332] [Ruby trunk Bug#15385] Ruby process hang in ensure
[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
@ 2018-12-06 1:40 ` pawel.pacana
2018-12-06 5:25 ` [ruby-core:90333] " ujihisa
` (3 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: pawel.pacana @ 2018-12-06 1:40 UTC (permalink / raw)
To: ruby-core
Issue #15385 has been reported by pawelpacana (Paweł Pacana).
----------------------------------------
Bug #15385: Ruby process hang in ensure
https://bugs.ruby-lang.org/issues/15385
* Author: pawelpacana (Paweł Pacana)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin18]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
While playing with mutation testing of my code I've found a weird mutation that hangs Ruby process. The isolated code which triggers this freeze is:
~~~ ruby
require 'timeout'
puts Process.pid
def raise_before_returning
raise
[]
end
def doh
value = raise_before_returning
ensure
# p value # <-- that unblocks it
value if nil
end
Timeout.timeout(3) do
doh
end
~~~
1. `Timeout` is unnecessary and was added to illustrate that it has no effect to interrupt hanged process.
2. `Process.pid` is printed for convenience to kill hanged process.
3. Printing `value` in ensure changes behavior, there is no hang when encountering `value if nil` below.
I've also checked `ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-darwin18]` and the problem persists.
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* [ruby-core:90333] [Ruby trunk Bug#15385] Ruby process hang in ensure
[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
2018-12-06 1:40 ` [ruby-core:90332] [Ruby trunk Bug#15385] Ruby process hang in ensure pawel.pacana
@ 2018-12-06 5:25 ` ujihisa
2018-12-07 19:33 ` [ruby-core:90373] " pawel.pacana
` (2 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: ujihisa @ 2018-12-06 5:25 UTC (permalink / raw)
To: ruby-core
Issue #15385 has been updated by ujihisa (Tatsuhiro Ujihisa).
This reproduces even without timeout library.
~~~ ruby
def doh
raise
ensure
123 if false
end
doh
~~~
looks like this is because the optimizer removed `if false` or `if nil` without adding `nop` iseq.
----------------------------------------
Bug #15385: Ruby process hang in ensure
https://bugs.ruby-lang.org/issues/15385#change-75444
* Author: pawelpacana (Paweł Pacana)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin18]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
While playing with mutation testing of my code I've found a weird mutation that hangs Ruby process. The isolated code which triggers this freeze is:
~~~ ruby
require 'timeout'
puts Process.pid
def raise_before_returning
raise
[]
end
def doh
value = raise_before_returning
ensure
# p value # <-- that unblocks it
value if nil
end
Timeout.timeout(3) do
doh
end
~~~
1. `Timeout` is unnecessary and was added to illustrate that it has no effect to interrupt hanged process.
2. `Process.pid` is printed for convenience to kill hanged process.
3. Printing `value` in ensure changes behavior, there is no hang when encountering `value if nil` below.
I've also checked `ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-darwin18]` and the problem persists.
---Files--------------------------------
reproduce.rb (216 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* [ruby-core:90373] [Ruby trunk Bug#15385] Ruby process hang in ensure
[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
2018-12-06 1:40 ` [ruby-core:90332] [Ruby trunk Bug#15385] Ruby process hang in ensure pawel.pacana
2018-12-06 5:25 ` [ruby-core:90333] " ujihisa
@ 2018-12-07 19:33 ` pawel.pacana
2018-12-11 11:53 ` [ruby-core:90419] " nagachika00
2019-01-14 11:40 ` [ruby-core:91078] " nagachika00
4 siblings, 0 replies; 5+ messages in thread
From: pawel.pacana @ 2018-12-07 19:33 UTC (permalink / raw)
To: ruby-core
Issue #15385 has been updated by pawelpacana (Paweł Pacana).
> ujihisa (Tatsuhiro Ujihisa) wrote:
> looks like this is because the optimizer removed `if false` or `if nil` without adding `nop` iseq.
Could it be related then to https://bugs.ruby-lang.org/issues/14959#note-7 and https://bugs.ruby-lang.org/issues/15392 then?
----------------------------------------
Bug #15385: Ruby process hang in ensure
https://bugs.ruby-lang.org/issues/15385#change-75483
* Author: pawelpacana (Paweł Pacana)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin18]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
While playing with mutation testing of my code I've found a weird mutation that hangs Ruby process. The isolated code which triggers this freeze is:
~~~ ruby
require 'timeout'
puts Process.pid
def raise_before_returning
raise
[]
end
def doh
value = raise_before_returning
ensure
# p value # <-- that unblocks it
value if nil
end
Timeout.timeout(3) do
doh
end
~~~
1. `Timeout` is unnecessary and was added to illustrate that it has no effect to interrupt hanged process.
2. `Process.pid` is printed for convenience to kill hanged process.
3. Printing `value` in ensure changes behavior, there is no hang when encountering `value if nil` below.
I've also checked `ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-darwin18]` and the problem persists.
---Files--------------------------------
reproduce.rb (216 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* [ruby-core:90419] [Ruby trunk Bug#15385] Ruby process hang in ensure
[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
` (2 preceding siblings ...)
2018-12-07 19:33 ` [ruby-core:90373] " pawel.pacana
@ 2018-12-11 11:53 ` nagachika00
2019-01-14 11:40 ` [ruby-core:91078] " nagachika00
4 siblings, 0 replies; 5+ messages in thread
From: nagachika00 @ 2018-12-11 11:53 UTC (permalink / raw)
To: ruby-core
Issue #15385 has been updated by nagachika (Tomoyuki Chikanaga).
Backport changed from 2.4: UNKNOWN, 2.5: UNKNOWN to 2.4: REQUIRED, 2.5: REQUIRED
I didn't confirm this can be reproduced on ruby_2_4 too.
After a quick code reading, I think it might be.
----------------------------------------
Bug #15385: Ruby process hang in ensure
https://bugs.ruby-lang.org/issues/15385#change-75574
* Author: pawelpacana (Paweł Pacana)
* Status: Closed
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin18]
* Backport: 2.4: REQUIRED, 2.5: REQUIRED
----------------------------------------
While playing with mutation testing of my code I've found a weird mutation that hangs Ruby process. The isolated code which triggers this freeze is:
~~~ ruby
require 'timeout'
puts Process.pid
def raise_before_returning
raise
[]
end
def doh
value = raise_before_returning
ensure
# p value # <-- that unblocks it
value if nil
end
Timeout.timeout(3) do
doh
end
~~~
1. `Timeout` is unnecessary and was added to illustrate that it has no effect to interrupt hanged process.
2. `Process.pid` is printed for convenience to kill hanged process.
3. Printing `value` in ensure changes behavior, there is no hang when encountering `value if nil` below.
I've also checked `ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-darwin18]` and the problem persists.
---Files--------------------------------
reproduce.rb (216 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* [ruby-core:91078] [Ruby trunk Bug#15385] Ruby process hang in ensure
[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
` (3 preceding siblings ...)
2018-12-11 11:53 ` [ruby-core:90419] " nagachika00
@ 2019-01-14 11:40 ` nagachika00
4 siblings, 0 replies; 5+ messages in thread
From: nagachika00 @ 2019-01-14 11:40 UTC (permalink / raw)
To: ruby-core
Issue #15385 has been updated by nagachika (Tomoyuki Chikanaga).
Memo: r61591, r61592, r66324 are related.
----------------------------------------
Bug #15385: Ruby process hang in ensure
https://bugs.ruby-lang.org/issues/15385#change-76307
* Author: pawelpacana (Paweł Pacana)
* Status: Closed
* Priority: Normal
* Assignee:
* Target version:
* ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin18]
* Backport: 2.4: REQUIRED, 2.5: REQUIRED
----------------------------------------
While playing with mutation testing of my code I've found a weird mutation that hangs Ruby process. The isolated code which triggers this freeze is:
~~~ ruby
require 'timeout'
puts Process.pid
def raise_before_returning
raise
[]
end
def doh
value = raise_before_returning
ensure
# p value # <-- that unblocks it
value if nil
end
Timeout.timeout(3) do
doh
end
~~~
1. `Timeout` is unnecessary and was added to illustrate that it has no effect to interrupt hanged process.
2. `Process.pid` is printed for convenience to kill hanged process.
3. Printing `value` in ensure changes behavior, there is no hang when encountering `value if nil` below.
I've also checked `ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-darwin18]` and the problem persists.
---Files--------------------------------
reproduce.rb (216 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-01-14 11:40 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <redmine.issue-15385.20181206014021@ruby-lang.org>
2018-12-06 1:40 ` [ruby-core:90332] [Ruby trunk Bug#15385] Ruby process hang in ensure pawel.pacana
2018-12-06 5:25 ` [ruby-core:90333] " ujihisa
2018-12-07 19:33 ` [ruby-core:90373] " pawel.pacana
2018-12-11 11:53 ` [ruby-core:90419] " nagachika00
2019-01-14 11:40 ` [ruby-core:91078] " nagachika00
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