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Rule 12. Error Handling (ERR)

Created by Robert Seacord, last modified by David Svoboda on May 20, 2025

Information for Editors
In order to have a new guideline automatically listed above be sure to label it err and rule.

Risk Assessment Summary

Rule	Severity	Likelihood	Detectable	Repairable	Priority	Level
ERR30-C	Medium	Probable	Yes	Yes	P12	L1
ERR32-C	Low	Unlikely	Yes	Yes	P3	L3
ERR33-C	High	Likely	Yes	Yes	P27	L1
ERR34-C	Medium	Unlikely	Yes	Yes	P6	L2

Related Rules and Recommendations

DCL09-C. Declare functions that return errno with a return type of errno_t

FIO40-C. Reset strings on fgets() or fgetws() failure

FLP03-C. Detect and handle floating-point errors

FLP32-C. Prevent or detect domain and range errors in math functions

MSC11-C. Incorporate diagnostic tests using assertions