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Defect #31387
closed
Don't rescue Exception class
Added by Pavel Rosický almost 7 years ago. Updated almost 7 years ago.
Resolution:
Fixed
Affected version:
Description
https://stackoverflow.com/questions/10048173/why-is-it-bad-style-to-rescue-exception-e-in-ruby
https://thoughtbot.com/blog/rescue-standarderror-not-exception
Exception is the root of Ruby's exception hierarchy, so when you rescue Exception you rescue from everything, including subclasses such as SyntaxError, LoadError, and Interrupt. Rescuing Interrupt prevents the user from using CTRL-C to exit the program.
I've seen a recent addition to redmine
def destroy IssueStatus.find(params[:id]).destroy redirect_to issue_statuses_path rescue Exception => e flash[:error] = l(:error_unable_delete_issue_status, ERB::Util.h(e.message)) redirect_to issue_statuses_path end
please replace these "safe" exceptions. StandardError is usually more than sufficient.
Files
| 0001-Custom-Exception-classes-should-inherit-StandardErro.patch (3.78 KB) 0001-Custom-Exception-classes-should-inherit-StandardErro.patch | Go MAEDA, 2019-05-20 13:44 | ||
| 0002-Don-t-rescue-Exception.patch (19.3 KB) 0002-Don-t-rescue-Exception.patch | Go MAEDA, 2019-05-20 14:24 |
Related issues
Updated by Go MAEDA almost 7 years ago
Thank you for pointing it out.
Maybe we should also check the following lines, shouldn't we?
$ egrep -rn 'rescue\s+Exception' app config lib extra app/models/mailer.rb:705: rescue Exception => e app/models/repository/git.rb:87: rescue Exception => e app/models/repository.rb:385: rescue Exception => e app/models/repository.rb:395: rescue Exception => e app/models/repository.rb:405: rescue Exception => e app/models/mail_handler.rb:56: rescue Exception => e app/models/import.rb:58: rescue Exception => e app/models/import.rb:262: rescue Exception => e app/controllers/auth_sources_controller.rb:63: rescue Exception => e app/controllers/admin_controller.rb:57: rescue Exception => e app/controllers/admin_controller.rb:68: rescue Exception => e config/routes.rb:358: rescue Exception => e lib/redmine/plugin.rb:421: rescue Exception => e lib/redmine/plugin.rb:432: rescue Exception => e lib/redmine/plugin.rb:443: rescue Exception => e lib/redmine/scm/adapters/mercurial_adapter.rb:95: rescue Exception => e lib/redmine/scm/adapters/subversion_adapter.rb:118: rescue Exception => e lib/redmine/scm/adapters/abstract_adapter.rb:254: rescue Exception => e lib/redmine/scm/adapters/abstract_adapter.rb:285: rescue Exception => err lib/tasks/email.rake:167: rescue Exception => e lib/tasks/migrate_from_trac.rake:617: rescue Exception => e lib/tasks/migrate_from_trac.rake:632: rescue Exception => e lib/tasks/locales.rake:171: rescue Exception => e1 lib/tasks/locales.rake:176: rescue Exception => e extra/svn/reposman.rb:57: rescue Exception => e extra/mail_handler/rdm-mailhandler.rb:207: rescue Exception => e
Updated by Go MAEDA almost 7 years ago
- Related to Feature #31361: Include a reason in the error message when an issue status cannot be deleted added
Updated by Go MAEDA almost 7 years ago
- File 0001-Custom-Exception-classes-should-inherit-StandardErro.patch 0001-Custom-Exception-classes-should-inherit-StandardErro.patch added
- File 0002-Don-t-rescue-Exception.patch added
- Category set to Code cleanup/refactoring
- Target version set to Candidate for next minor release
Here are patches to fix not to raise/rescue Exception. I hope someone to review these patches.
Updated by Pavel Rosický almost 7 years ago
thanks, there's a typo in config/routes.rb
it should be rescue SyntaxError, StandardError => e
Updated by Go MAEDA almost 7 years ago
Pavel Rosický wrote:
it should be
rescue SyntaxError, StandardError => e
Thanks, updated the patch. Could you tell me why it caches SyntaxError? To detect syntax error in plugins' routes.rb?
Updated by Go MAEDA almost 7 years ago
- File deleted (
0002-Don-t-rescue-Exception.patch)
Updated by Pavel Rosický almost 7 years ago
exceptions have a hierarchy
Exception
NoMemoryError
ScriptError
LoadError
NotImplementedError
SyntaxError
SignalException
Interrupt
StandardError
ArgumentError
IOError
EOFError
IndexError
LocalJumpError
NameError
NoMethodError
RangeError
FloatDomainError
RegexpError
RuntimeError
SecurityError
SystemCallError
SystemStackError
ThreadError
TypeError
ZeroDivisionError
SystemExit
as you can see SyntaxError doesn't inherit from StandardError. It's a common mistake and the original intention was to show a better message that there's an error in a plugin instead of a long and confusing backtrace that Ruby would usually print.
Updated by Go MAEDA almost 7 years ago
- Target version changed from Candidate for next minor release to 4.1.0
Setting the target version to 4.1.0.
Updated by Go MAEDA almost 7 years ago
Pavel Rosický wrote:
as you can see SyntaxError doesn't inherit from StandardError. It's a common mistake and the original intention was to show a better message that there's an error in a plugin instead of a long and confusing backtrace that Ruby would usually print.
You are right.
With catching SyntaxError:
An error occurred while loading the routes definition of redmine_message_customize plugin (/Users/maeda/redmines/redmine-trunk/plugins/redmine_message_customize/config/routes.rb): (eval):7: syntax error, unexpected end-of-input, expecting '}'.
Without catching SyntaxError:
Traceback (most recent call last):
47: from bin/rails:4:in `<main>'
46: from bin/rails:4:in `require'
45: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in `<top (required)>'
44: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command.rb:46:in `invoke'
43: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in `perform'
42: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
41: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
40: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
39: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/commands/console/console_command.rb:95:in `perform'
38: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/actions.rb:15:in `require_application_and_environment!'
37: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/actions.rb:28:in `require_environment!'
36: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application.rb:337:in `require_environment!'
35: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application.rb:337:in `require'
34: from /Users/maeda/redmines/redmine-trunk/config/environment.rb:16:in `<top (required)>'
33: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application.rb:361:in `initialize!'
32: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/initializable.rb:60:in `run_initializers'
31: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
30: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
29: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
28: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `call'
27: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:347:in `each'
26: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
25: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
24: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
23: from /Users/maeda/.rbenv/versions/2.6.1/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
22: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/initializable.rb:61:in `block in run_initializers'
21: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `run'
20: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/initializable.rb:32:in `instance_exec'
19: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/finisher.rb:130:in `block in <module:Finisher>'
18: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:10:in `execute'
17: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/file_update_checker.rb:83:in `execute'
16: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:30:in `block in updater'
15: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:20:in `reload!'
14: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:41:in `load_paths'
13: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:41:in `each'
12: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application/routes_reloader.rb:41:in `block in load_paths'
11: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:285:in `load'
10: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
9: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:285:in `block in load'
8: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:285:in `load'
7: from /Users/maeda/redmines/redmine-trunk/config/routes.rb:20:in `<top (required)>'
6: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:414:in `draw'
5: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:432:in `eval_block'
4: from /Users/maeda/redmines/gems/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:432:in `instance_exec'
3: from /Users/maeda/redmines/redmine-trunk/config/routes.rb:355:in `block in <top (required)>'
2: from /Users/maeda/redmines/redmine-trunk/config/routes.rb:355:in `glob'
1: from /Users/maeda/redmines/redmine-trunk/config/routes.rb:359:in `block (2 levels) in <top (required)>'
/Users/maeda/redmines/redmine-trunk/config/routes.rb:359:in `instance_eval': (eval):7: syntax error, unexpected end-of-input, expecting '}' (SyntaxError)
Updated by Go MAEDA almost 7 years ago
According to r6230, it seems that we have to catch Exception in lib/redmine/scm/adapters/abstract_adapter.rb unless we drop the support for JRuby.
Index: lib/redmine/scm/adapters/abstract_adapter.rb
===================================================================
--- lib/redmine/scm/adapters/abstract_adapter.rb (リビジョン 6229)
+++ lib/redmine/scm/adapters/abstract_adapter.rb (リビジョン 6230)
@@ -224,7 +224,11 @@
io.close_write
block.call(io) if block_given?
end
- rescue Errno::ENOENT => e
+ ## If scm command does not exist,
+ ## Linux JRuby 1.6.2 (ruby-1.8.7-p330) raises java.io.IOException
+ ## in production environment.
+ # rescue Errno::ENOENT => e
+ rescue Exception => e
msg = strip_credential(e.message)
# The command failed, log it and re-raise
logmsg = "SCM command failed, "
Updated by Go MAEDA almost 7 years ago
- Related to Patch #29441: Remove code related to JRuby and unsupported Ruby versions added
Updated by Pavel Rosický almost 7 years ago
This was a fix for a very, very old jruby version. It should match MRI's behaviour now.
Updated by Go MAEDA almost 7 years ago
- Subject changed from don't rescue Exception to Don't rescue Exception class
- Status changed from New to Closed
- Resolution set to Fixed
Committed the patch.
Pavel Rosický wrote:
This was a fix for a very, very old jruby version. It should match MRI's behaviour now.
Thank you for the advice. I committed the following code.
Index: lib/redmine/scm/adapters/abstract_adapter.rb
===================================================================
--- lib/redmine/scm/adapters/abstract_adapter.rb (リビジョン 18196)
+++ lib/redmine/scm/adapters/abstract_adapter.rb (リビジョン 18197)
@@ -247,11 +247,7 @@
io.close_write unless options[:write_stdin]
block.call(io) if block_given?
end
- ## If scm command does not exist,
- ## Linux JRuby 1.6.2 (ruby-1.8.7-p330) raises java.io.IOException
- ## in production environment.
- # rescue Errno::ENOENT => e
- rescue Exception => e
+ rescue => e
msg = strip_credential(e.message)
# The command failed, log it and re-raise
logmsg = "SCM command failed, "
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