Review

Detector:	MuDetect_170413_NumberOfMappingsHeuristic
Target:	project ' closure ' version 319
Misuse:	misuse ' 2 '
Tags:

Misuse Details

Details about the known misuse from the MUBench dataset.

Description:	Parameters.getParameter() may throw CmdLineException.
Fix Description:	Surround with try/catch. (see diff)
Violation Types:	missing/exception handling
In File:	com/google/javascript/jscomp/CommandLineRunner.java
In Method:	parseArguments(Parameters)
Code with Misuse:	`class CommandLineRunner.Flags.BooleanOptionHandler { @Override public int parseArguments(Parameters params) throws CmdLineException { String param = params.getParameter(0); if (param == null) { setter.addValue(true); return 0; } else { String lowerParam = param.toLowerCase(); if (TRUES.contains(lowerParam)) { setter.addValue(true); } else if (FALSES.contains(lowerParam)) { setter.addValue(false); } else { setter.addValue(true); return 0; } return 1; } } }`

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 Examples	Pattern Support	Pattern Violation	Target Environment Mapping
?	1684	0.2714923	((pattern support = 13 / 70)(pattern violations = 1 / 107)(violation support = 1 / 11)(overlap = 1 - (3 / 15))) / 4	closure/319/original-src/com/google/javascript/jscomp/NodeUtil.java#functionCallHasSideEffects(Node, AbstractCompiler);closure/319/original-src/com/google/javascript/jscomp/AliasStrings.java#visit(NodeTraversal, Node, Node);closure/319/original-src/com/google/javascript/jscomp/JsMessageVisitor.java#extractFromCallNode(Builder, Node);closure/319/original-src/com/google/javascript/jscomp/VarCheck.java#visit(NodeTraversal, Node, Node);closure/319/original-src/com/google/javascript/jscomp/FunctionArgumentInjector.java#findModifiedParameters(Node, Node, Set, Set)	13
?	1685	0.2714923	((pattern support = 13 / 70)(pattern violations = 1 / 107)(violation support = 1 / 11)(overlap = 1 - (3 / 15))) / 4	closure/319/original-src/com/google/javascript/jscomp/NodeUtil.java#functionCallHasSideEffects(Node, AbstractCompiler);closure/319/original-src/com/google/javascript/jscomp/AliasStrings.java#visit(NodeTraversal, Node, Node);closure/319/original-src/com/google/javascript/jscomp/JsMessageVisitor.java#extractFromCallNode(Builder, Node);closure/319/original-src/com/google/javascript/jscomp/VarCheck.java#visit(NodeTraversal, Node, Node);closure/319/original-src/com/google/javascript/jscomp/FunctionArgumentInjector.java#findModifiedParameters(Node, Node, Set, Set)	13