Debugging is the process of examining the state of a program - generally with a debugging tool - while it is running and attempting to find bugs that cause it to behave abnormally.

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2
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2answers
26 views

How can I track down a dependency that is causing an X509TrustManager error without having the source?

I am maintaining and Android app that now suffers from an unsafe X509 TrustManager implementation. Since the app doesn't make any HTTPS calls except through dependencies, one of the dependencies is ...
0
votes
2answers
73 views

What is a debug port

I want to explore code paths in Cassandra database, so after getting the code from git and explore it a bit I noticed that it starts a daemon process when I run it from Eclipse. I supposed that when ...
-1
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2answers
76 views

Run C program in debug mode (without debugger)

If I want my program to be able to run in debug mode, is it a good idea to make it accept a flag such as -D=DEBUG when I run the program? I currently have a DEBUG variable in a .h file but that I can'...
1
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2answers
78 views

Replacing buggy component with library: important to identify bug in old component before replacing?

Summary: component used to work and now doesn't, the regression happened 1+ years ago and we're not sure when, now I'm considering replacing the broken and poorly architected component with a mature ...
0
votes
2answers
172 views

Recognize bug or inability to solve a problem by yourself

How to recognize when there is a bug in program or you have an inability to solve concrete problem? I noticed when I concentrate too much time on a problem and can't find a solution, I am starting to ...
-5
votes
1answer
65 views

Proper use of break; [closed]

I am trying to establish my POINT value when the sum is equal to 4, 5, 6, 8, 9, 10, but terminal continues to execute my code even after the break;. Can someone please explain why this is happening? ...
1
vote
1answer
134 views

For Web front end, if there are 20 JavaScript files loading, how to track down the mouseover handler?

For Web front end programming, since any JavaScript can set up an event listener for "mouseover" or "mouseenter" for an element, if we are to track down what is the code that is responsible for making ...
1
vote
3answers
115 views

Are debug-build-only UI controls a bad practice?

Often, to simplify testing, I add UI controls that are only visible and enabled in debug build only. Or prepopulate mandatory input fields in debug build. Is this a bad practice? Assuming the release ...
0
votes
2answers
175 views

How to analyze a code of a web application which is running? [closed]

Joshua Bloch said in an interview that the best way to know and understand code written by others is to read it, mentally or through a debugger. Well, my question is this: is it possible, through a ...
-2
votes
1answer
104 views

Debugging mutually recursive functions

We have a class in which mainly data processing(XML nodes) is done by mainly 3 methods. Now code in itself strictly follows DRY principle. For e.g. Process Children (reads data from child nodes) ...
1
vote
2answers
100 views

How to determine if there's something wrong with my code or a bug in the library

I'm working with Meteor, which is a relatively young Javascript framework. As such, it seems like I often run into problems which haven't been asked on Stackoverflow already. In one such case, I was ...
1
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3answers
97 views

How to debug javascript in browsers that don't have a console interface? [closed]

It's unbelievable but my company is still building web app on IE 6. Although the online dashboard for IE 6 is limited in functionality, I've found extremely difficult to debug anything on it. It's ...
1
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3answers
169 views

Is a logical error always caused by the line of code for the earliest program state which is wrong? [closed]

A logical error, contrary to a fatal runtime error, is a run time error which doesn't fatally terminate a program, but does something not intended. Is a logical error necessarily caused by the line ...
15
votes
3answers
818 views

How can I diagnose async/await deadlocks?

I am working with a new codebase that makes heavy use of async/await. Most of the people on my team are also fairly new to async/await. We generally tend to hold to Best Practices as Specified by ...
1
vote
1answer
103 views

Should Write-Debug statements be left in production PowerShell code?

This is one of my functions I have in a module: Function Get-DatabaseUser { [CmdletBinding()] Param() Write-Verbose 'Getting database...' $Database = Get-Database Write-Debug('...
-1
votes
1answer
1k views

What is an Integration Point?

How is an Integration Point defined within the context of an application? I've heard about it in a programming course but couldn't grasp the concept in a way that I could distinguish an integration ...
3
votes
2answers
292 views

Methods of “Code Softening” (Opposite of “Hardening”) for C & C++ [closed]

Some developers work on code hardening. (protecting against errors, you can build with a stack protector for example). However, if you're trying to redo a strange someone else reports, or find ...
2
votes
0answers
78 views

Reducing conditional code makes assessing coverage or debugging difficult

Working in Python, I've written a few utilities to assert pre-conditions and to re-interpret exceptions, and have found my code doesn't have so many branches. I've also tried to move other code path ...
1
vote
1answer
96 views

Should I put stack trace in error files and halt my app with user friendly error [closed]

In my earlier project I wrote an app that is used in-house. My usual practice is to capture errors/exceptions from different classes and threads and put them in different log files corresponding to ...
-1
votes
2answers
219 views

How to debug a program after it appears to fix itself [closed]

While chasing a segfault around a complicated and grouchy c++ program I added several //comments and cout statements, but no 'actual' code. Then, suddenly, for no apparent reason the segfault vanishes....
13
votes
6answers
1k views

Time estimating of a complex bug investigation (not a straight-forward one) [duplicate]

(It is not a duplicate: Bug investigation is much more non-deterministic than a defined development task where things to be done are specified. Investigation is about narrowing a huge search space, ...
2
votes
3answers
2k views

Using System.err.println() for debugging in Java

System.err The "standard" error output stream. This stream is already open and ready to accept output data. Typically this stream corresponds to display output or another output destination ...
2
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2answers
132 views

Managing scaffolding for debug vs production builds

The more I program the more I realize that most of my time is spent writing scaffolding for programs so that I can debug them and then strip away the scaffolding for production. The problem is that ...
1
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3answers
390 views

How do you debug a complex application? [closed]

I have an application that is returning the wrong output, when it is run with a particular input choice. I haven't been able to get anywhere near a diagnosis of the fault, despite spending about a ...
0
votes
3answers
353 views

Who fixes bugs in a team? [duplicate]

In an agile software development team, who would be the one to fix the bugs introduced in an update? The developer who writes the feature? Someone else specialized specifically in debugging with a ...
25
votes
7answers
3k views

What's the best way to avoid catastrophe caused by negligence? [duplicate]

I have been a programmer for almost 1 year. As an ADHD adult, naturally I don't have the same strength of attention on ordinary stuffs as my colleagues do. And I find the catastrophe made by me are ...
243
votes
21answers
34k views

Leaving intentional bugs in code for testers to find

We don't do this at our firm, but one of my friends says that his project manager asked every developer to add intentional bugs just before the product goes to QA. This is how it works: Just before ...
0
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2answers
45 views

How do we sequence logs from different services in a system?

So, if I am designing a system as a set of different roles (client, app-server, backend services 1 to n). Each of these roles will have their own logging mechanism. I can aggregate all the logs at one ...
1
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0answers
85 views

Curiosity: Unassembled asm in Windows Bootloader

I found this little gem waiting for me in the Windows (10/TP) bootmgr located on the first 300+- MB partition. Can anyone explain to me what it does? Is there an assembler hidden somewhere? These all ...
9
votes
5answers
264 views

Correctly disposing objects upon server termination

I am working on a large C++ project. It consists in a server that exposes a REST API, providing a simple and user-friendly interface for a very broad system comprising many other servers. The codebase ...
12
votes
5answers
707 views

How can I encourage people to read error messages? [duplicate]

I was wondering if there are some good ways to encourage people to read error messages when the compilation fails. People (especially) the junior ones usually ignore the error messages and just ask ...
-2
votes
1answer
99 views

Is software inherently buggy and hence, vulnerable? [duplicate]

Could no amount of formal analysis, type/rule checking prevent it's exploitation? How about a fully verified kernel such as SEL4 ?
5
votes
6answers
917 views

When should you start unit testing? (during which development stage?)

I'm currently learning about unit testing, specifically JUnit (with Java). Searching the web I see many threads talking about why you should use it, what type of methods you should use it with but I ...
3
votes
1answer
2k views

How to debug minified javascript on production? [closed]

I have a front end single page app deployed on S3. It is minified on production. It creates error only when it is minified via grunt on production. I cannot repro the issue in dev. How do I go about ...
6
votes
6answers
1k views

What is the actual reason that locks (sentinels) in OO are hard to reason about? [closed]

In this talk, Rich Hickey introduces Clojure. He gives an Ants demo and talks about his motivations for implementing a Software Transactional Memory (STM) system. His reasoning for STM is that "...
3
votes
2answers
434 views

How to avoid long call chains?

I have a hierarchy of objects, mostly connected by composition. I.e. (not showing the class methods for readability): class A {} class B {A a;} class C {B b;} etc... class Z {Y y;} class Z provides ...
0
votes
1answer
138 views

Extending a class for debugging: public API, hidden implementation or something else?

I'm working on a fairly large project that involves 3D drawing, and I want to add some visualizers (for example, to see the bounding boxes of the objects) to make debugging easier. However, I'm having ...
2
votes
1answer
388 views

Debugging xml and annotations

By now, most web containers have an annotation variant of their xml configurations for Java EE. I'm guessing this is because it's better to keep things in Java where they can be managed, coded with ...
-2
votes
2answers
83 views

Debug symbols change application execution [closed]

I have to set up remote debugging for a multi threaded application running on a embedded device. C++ is the language. I've gotten so far and got the remote debugging working for a simple application, ...
2
votes
1answer
363 views

Writing software without unit testing

Usually, when I write software, I use unit tests for each function to test if it is working without any problems. However, recently I have found myself writing some software that are not really ...
-2
votes
1answer
1k views

Illustrate Meaning of : gcc -g programName.c

To debug a C program using gdb effectively it is required to compile it first using the command: gcc -g programName.c otherwise on using simply gcc programName.c and running we are unable to ...
0
votes
2answers
147 views

can a logic error happen way later than its cause? [closed]

For comparison, for a runtime fatal error, it is often that the cause of the error is way before the error crashes a program. For a logic error, it doesn't crash a program. It happens when the state ...
3
votes
4answers
173 views

What is your approach to debugging a transient problem [closed]

I am working on a system that controls a label printer and occasionally the label printer will print the same label 2,3,...,10 times. The error is transient, occurring once per 3000-4000 (once a ...
19
votes
4answers
6k views

Debugging memory corruption

First off, I do realize this is not a perfect Q&A style question with an absolute answer, but I can't think of any wording to make it work better. I don't think there is an absolute solution to ...
3
votes
1answer
233 views

Android testing - bugs not reproducible [duplicate]

We have the following problem: at the end of the iteration we give our Android app to our customers to test. Our customers report bugs that are not reproducible on our test devices. How can we deal ...
5
votes
3answers
670 views

Declaring variables in Python and PHP

The question is how to cope with absence of variable declaration in Python, PHP, and the like. In most languages there is a way to let the compiler know whether I introduce a new variable or refer to ...
4
votes
3answers
185 views

How do I fix an “emergent” bug?

I'm writing a PDE solver, and I have a bug that only shows up in very large test cases. That is, with small grids the program gives correct answers, but there's a large amount of unaccounted-for error ...
2
votes
2answers
108 views

Does anyone still use logic analyzers for debugging real time systems?

Many years ago when debugging real time systems (such as the ones used in telephone switches) we had to use logic analyzers (which read execution straight from the CPU) or emulators (which physically ...
2
votes
2answers
68 views

Methodology To Determine Cause Of User Specific Error

We have software that for certain clients fails to download a file. The software is developed in Python and compiled into an Windows Executable. The cause of the error is still unknown but we have ...
11
votes
5answers
941 views

Learning to investigate bugs [closed]

I'm not even sure how to define this difficulty. It reminds me of the test a couple of prospective employees did on me before I got a job. They would pick an object in the room and then I'd be allowed ...