exception-handling – Page 2

Elmah not working with asp.net site

February 5, 2023 by Tarik

I just had a similar problem with Elmah not working in an IIS7 deployment. I found that I needed to register the Elmah Modules and Handlers in system.web AND system.webServer: <system.web> … <httpHandlers> … <add verb=”POST,GET,HEAD” path=”elmah.axd” type=”Elmah.ErrorLogPageFactory, Elmah” /> … </httpHandlers> <httpModules> … <add name=”ErrorLog” type=”Elmah.ErrorLogModule, Elmah”/> <add name=”ErrorMail” type=”Elmah.ErrorMailModule, Elmah” /> <add name=”ErrorFilter” … Read more

How can I add a message to an exception without losing any information in C#?

February 5, 2023 by Tarik

If you just need to add information to the original exception, such as a user-readable message or specific details that will be useful to you in tracking down the error but that won’t be useful to the end user, you can make use of the Exception’s Data property, which is a key/value pair dictionary. We … Read more

When I `throw` something, where is it stored in memory?

February 2, 2023 by Tarik

Yes, the answer is compiler-dependent. A quick experiment with my compiler (g++ 4.4.3) reveals that its runtime library first tries to malloc memory for the exception and, failing that, attempts to allocate space within a process-wide “emergency buffer” that lives on the data segment. If that doesn’t work out, it calls std::terminate(). It would appear … Read more

Throws or try-catch

February 2, 2023 by Tarik

catch an exception only if you can handle it in a meaningful way declare throwing the exception upward if it is to be handled by the consumer of the current method throw exceptions if they are caused by the input parameters (but these are more often unchecked)

Android exception handling best practice?

February 2, 2023 by Tarik

Here, check for the link for reference. In here you create a class say ExceptionHandler that implements java.lang.Thread.UncaughtExceptionHandler.. Inside this class you will do your life saving stuff like creating stacktrace and gettin ready to upload error report etc…. Now comes the important part i.e. How to catch that exception. Though it is very simple. … Read more

Why is the Catch(Exception) almost always a bad Idea?

February 2, 2023 by Tarik

Because when you catch exception you’re supposed to handle it properly. And you cannot expect to handle all kind of exceptions in your code. Also when you catch all exceptions, you may get an exception that cannot deal with and prevent code that is upper in the stack to handle it properly. The general principal … Read more

Exception handling in Haskell

February 2, 2023 by Tarik

When do I use which function? Here’s the recommendation from the Control.Exception documentation: If you want to do some cleanup in the event that an exception is raised, use finally, bracket or onException. To recover after an exception and do something else, the best choice is to use one of the try family. … unless … Read more

Report for exceptions from Google Analytics analytics.js exception tracking

February 1, 2023 by Tarik

Figured it out. I’m not sure why they don’t make this a built in report but maybe someday. I made a custom widget in a dashboard with Exception Description for dimension and ‘Crashes’ for the metric: Which gives me a report like this: You can also go to Customization tab and create a custom report … Read more

Exception handling in shell scripting?

January 31, 2023 by Tarik

There is not really a try/catch in bash (i assume you’re using bash), but you can achieve a quite similar behaviour using && or ||. In this example, you want to run fallback_command if a_command fails (returns a non-zero value): a_command || fallback_command And in this example, you want to execute second_command if a_command is … Read more

How to test with Python’s unittest that a warning has been thrown?

January 31, 2023 by Tarik

Starting with Python 3.2, you can simply use assertWarns() method. with self.assertWarns(Warning): do_something()