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A software bug is a design defect in computer software. A computer program with many or serious bugs may be described as buggy . The effects of a software bug range from minor (such as a misspelled word in the user interface ) to severe (such as frequent crashing ).
The Apple "goto fail" bug was a duplicated line of code which caused a public key certificate check to pass a test incorrectly. The GnuTLS "goto fail" bug was similar to the Apple bug and found about two weeks later. The GnuTLS bug also allowed attackers to bypass SSL/TLS security. [8]
NFF implies that a failure (fault) occurred or was reported to have occurred during a product’s use. The product was analyzed or tested to confirm the failure, but “a failure or fault” could be not found. A common example of the NFF phenomenon occurs when your computer “hangs up”. Clearly, a “failure” has occurred.
Software testing typically includes handling software bugs – a defect in the code that causes an undesirable result. [11]: 31 Bugs generally slow testing progress and involve programmer assistance to debug and fix. Not all defects cause a failure. For example, a defect in dead code will not be considered a failure.
Situations which are frequently called computer glitches are incorrectly written software (software bugs), incorrect instructions given by the operator (operator errors, and a failure to account for this possibility might also be considered a software bug), undetected invalid input data (this might also be considered a software bug), undetected ...
In engineering, debugging is the process of finding the root cause, workarounds and possible fixes for bugs.. For software, debugging tactics can involve interactive debugging, control flow analysis, log file analysis, monitoring at the application or system level, memory dumps, and profiling.
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In the context of software quality, defect criticality is a measure of the impact of a software defect. It is defined as the product of severity, likelihood, and class.