Review

Detector:	MuDetect_170320_Baseline
Target:	project ' lucene ' version 1918
Misuse:	misuse ' tikanga-0 '
Tags:

Misuse Details

Details about the known misuse from the MUBench dataset.

Description:	Iterator.next() is invoked without prior check of hasNext().
Fix Description:
Violation Types:	missing/condition/value_or_state
In File:	org/apache/lucene/util/AttributeSource.java
In Method:	computeCurrentState()
Code with Misuse:	`class AttributeSource { private void computeCurrentState() { currentState = new State(); State c = currentState; Iterator it = attributeImpls.values().iterator(); c.attribute = (AttributeImpl) it.next(); while (it.hasNext()) { c.next = new State(); c = c.next; c.attribute = (AttributeImpl) it.next(); } } }`

Potential Hits

Findings of the detector that identify an anomaly in the same file and method as the known misuse.

Hit	Rank	Confidence	Confidence String	Pattern Support	Pattern Violation	Target Environment Mapping
?	113	0.4665256	((pattern support = 16 / 495)(pattern violations = 1 / 130)(violation support = 1 / 1)(overlap = 1 - (4 / 23))) / 4	16
?	129	0.4574495	((pattern support = 11 / 495)(pattern violations = 1 / 132)(violation support = 1 / 1)(overlap = 1 - (7 / 35))) / 4	11
?	1352	0.24543367	((pattern support = 16 / 495)(pattern violations = 1 / 107)(violation support = 1 / 87)(overlap = 1 - (1 / 14))) / 4	16
?	154	0.4389887	((pattern support = 16 / 495)(pattern violations = 1 / 107)(violation support = 1 / 1)(overlap = 1 - (4 / 14))) / 4	16
?	2032	0.23200306	((pattern support = 11 / 495)(pattern violations = 1 / 132)(violation support = 1 / 80)(overlap = 1 - (4 / 35))) / 4	11
?	754	0.26475933	((pattern support = 16 / 495)(pattern violations = 1 / 130)(violation support = 1 / 16)(overlap = 1 - (1 / 23))) / 4	16