SBasalaev opened a new issue, #5090:
URL: https://github.com/apache/netbeans/issues/5090
### Apache NetBeans version
Apache NetBeans 16
### What happened
When I add a case with a block to the switch expression, exception
notification appears and completion stops working. If I try to save a file
after that the whole application freezes.
### How to reproduce
Suppose I have a class
```java
class Switch {
public boolean test(Object value) {
return switch (value) {
default -> false;
}
}
}
```
Then I start adding a new case. The issue happens right after I type the
opening brace
```java
class Switch {
public boolean test(Object value) {
return switch (value) {
case Boolean b -> { // <- this line added
default -> false;
}
}
}
```
Creating file with that contents does not always cause the issue but typing
the line in editor always does. This also happened in previous versions of
NetBeans and with previous JDK versions.
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Ubuntu Linux 22.04 amd64
### JDK
OpenJDK 16 (system provided)
### Apache NetBeans packaging
Apache NetBeans provided installer
### Anything else
Stack trace reported by NetBeans
```
Caused: java.lang.NullPointerException: Cannot read field "type" because
"tree" is null
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scanCond(Flow.java:2145)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitYield(Flow.java:2785)
at com.sun.tools.javac.tree.JCTree$JCYield.accept(JCTree.java:1660)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at
com.sun.tools.javac.comp.Flow$BaseAnalyzer.scanSyntheticBreak(Flow.java:459)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.handleSwitch(Flow.java:2597)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitSwitchExpression(Flow.java:2565)
at
com.sun.tools.javac.tree.JCTree$JCSwitchExpression.accept(JCTree.java:1382)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scanExpr(Flow.java:2118)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitReturn(Flow.java:2818)
at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1711)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitBlock(Flow.java:2402)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1082)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitMethodDef(Flow.java:2305)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:912)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitClassDef(Flow.java:2243)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:810)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:447)
at com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:1861)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.analyzeTree(Flow.java:3031)
at
com.sun.tools.javac.comp.Flow$AssignAnalyzer.analyzeTree(Flow.java:3013)
at com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:224)
at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1377)
at com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1341)
at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:404)
at
com.sun.tools.javac.api.JavacTaskImpl.lambda$analyze$1(JavacTaskImpl.java:379)
at
com.sun.tools.javac.api.JavacTaskImpl.invocationHelper(JavacTaskImpl.java:152)
at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:379)
Caused: java.lang.IllegalStateException
at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:383)
at
org.netbeans.modules.java.source.parsing.JavacParser.moveToPhase(JavacParser.java:770)
at
org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:540)
at
org.netbeans.modules.java.source.parsing.JavacParser.getResult(JavacParser.java:141)
at
org.netbeans.modules.parsing.impl.TaskProcessor.callGetResult(TaskProcessor.java:608)
at
org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:241)
at
org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:775)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
at
org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:702)
[catch] at
org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:663)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
```
### Are you willing to submit a pull request?
No
### Code of Conduct
Yes
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