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Modifying a Collection while iterating over it results in undefined behavior.
Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
MSC06-J | Low | Probable | Medium | P4 | L3 |
Automated Detection
Some static analysis tools can detect cases where an iterator is being used after the source container of the iterator is modified.
| Tool | Version | Checker | Description |
|---|---|---|---|
| Parasoft Jtest |
|
|
| BD.CO.ITMOD |
| Do not modify collection while iterating over it |
Related Vulnerabilities
The Apache Harmony bug HARMONY-6236 documents an ArrayList breaking when given concurrent collections as input.
Bibliography
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