60 lines
1.1 KiB
Plaintext
60 lines
1.1 KiB
Plaintext
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If the denominator to a division or modulo operation is zero it would result in a fatal error.
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== Why is this an issue?
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This is an issue because dividing by zero is a forbidden operation which leads to a fatal error.
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=== What is the potential impact?
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This issue can lead your program to an unexpected halt with all the inconveniences it entails.
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== How to fix it
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Make sure that zero never reaches the denominator.
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=== Code examples
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==== Noncompliant code example
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[source,text,diff-id=1,diff-type=noncompliant]
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----
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def non_compliant():
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z = 0
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if (unknown()):
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# ...
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z = 4
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else:
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# ...
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z = 1 / z
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----
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==== Compliant solution
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[source,text,diff-id=1,diff-type=compliant]
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----
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def compliant():
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z = 0
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if (unknown()):
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# ...
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z = 4
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else:
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# ...
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z = 1
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z = 1 / z
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----
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=== How does this work?
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By ensuring that for all the paths that can define the variable ++z++, when none assigns it zero, we are sure that the issue is fixed.
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//=== Pitfalls
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//=== Going the extra mile
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//== Resources
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//=== Documentation
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//=== Articles & blog posts
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//=== Conference presentations
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//=== Standards
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