Bug

A bug is a defect in software, whether in the code, the design or the configuration, that makes the program behave incorrectly or unexpectedly. The cause can be a typo, a wrong assumption, a missed edge case or an unexpected interaction between components.

Why it matters

Bugs cost time and money, and their severity ranges from a cosmetic misalignment to data loss or an outage. Clear bug reports speed up fixes, and automated tests stop fixed bugs from returning. Finding the cause is called debugging.

Example

A useful bug report includes steps, expected and actual behavior:

Title: Coupon applies twice on checkout
Steps: 1) Add item  2) Apply SAVE10  3) Go back, apply SAVE10 again
Expected: discount applied once (10%)
Actual: discount applied twice (19%)
Environment: Chrome 130, production

With that, a developer can reproduce it, fix it and add a unit test to prevent a repeat.

Common mistakes

• Reporting "it doesn't work" without steps, error messages or the environment.
• Fixing the symptom rather than the root cause, so the problem comes back elsewhere.
• Not adding a regression test after the fix.

Related

• Debugging
• Stack trace
• Exception
• Unit test

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.