Index out of bounds for empty switch #2995
Description
Since update to 4.8.4 I'm getting this
java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 0
At edu.umd.cs.findbugs.SwitchHandler.enterSwitch(SwitchHandler.java:90)
At edu.umd.cs.findbugs.detect.FindDeadLocalStores.analyzeMethod(FindDeadLocalStores.java:283)
At edu.umd.cs.findbugs.detect.FindDeadLocalStores.visitClassContext(FindDeadLocalStores.java:198)
At edu.umd.cs.findbugs.DetectorToDetector2Adapter.visitClass(DetectorToDetector2Adapter.java:76)
At edu.umd.cs.findbugs.FindBugs2.lambda$analyzeApplication$1(FindBugs2.java:1108)
At java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
At edu.umd.cs.findbugs.CurrentThreadExecutorService.execute(CurrentThreadExecutorService.java:86)
At java.base/java.util.concurrent.AbstractExecutorService.invokeAll(AbstractExecutorService.java:242)
At edu.umd.cs.findbugs.FindBugs2.analyzeApplication(FindBugs2.java:1118)
At edu.umd.cs.findbugs.FindBugs2.execute(FindBugs2.java:309)
At edu.umd.cs.findbugs.FindBugs.runMain(FindBugs.java:395)
At edu.umd.cs.findbugs.FindBugs2.main(FindBugs2.java:1231)
when analyzing a generaated class that contains
switch(jjstateSet[--i]) {
default : break;
}
and
switch(jjmatchedKind) {
default :
break;
}
It could make sense to optimize the code generator, but I think it's still worth fixing the OutOfBounds problem in SpotBugs.
Possibly related to #2828