ADDITIONAL SYSTEM INFORMATION :
macOS Catalina 10.15.2
IntelliJ IDEA 2020.1 EAP (Bug occurs same way with 2019.3)


A DESCRIPTION OF THE PROBLEM :
Information:java: An exception has occurred in the compiler (13.0.1). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
Information:java: java.lang.NullPointerException
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitApply(Flow.java:1334)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1737)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:405)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.visitExec(TreeScanner.java:218)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1523)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitBlock(Flow.java:1083)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1030)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitMethodDef(Flow.java:1049)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:876)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.visitClassDef(Flow.java:1012)
Information:java: at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:784)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1427)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow$FlowAnalyzer.analyzeTree(Flow.java:1417)
Information:java: at jdk.compiler/com.sun.tools.javac.comp.Flow.analyzeTree(Flow.java:217)
Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1406)
Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1380)
Information:java: at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:972)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:104)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.handleExceptions(JavacTaskImpl.java:147)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:100)
Information:java: at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:94)
Information:java: at org.jetbrains.jps.javac.JavacMain.compile(JavacMain.java:207)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compileJava(JavaBuilder.java:490)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.compile(JavaBuilder.java:342)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.doBuild(JavaBuilder.java:267)
Information:java: at org.jetbrains.jps.incremental.java.JavaBuilder.build(JavaBuilder.java:220)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1412)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:1090)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1157)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:1051)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:880)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:447)
Information:java: at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:188)
Information:java: at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139)
Information:java: at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:297)
Information:java: at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:130)
Information:java: at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:232)
Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
Information:java: at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
Information:java: at java.base/java.lang.Thread.run(Thread.java:830)
Information:java: Errors occurred while compiling module 'Galgulador'
Information:javac 13.0.1 was used to compile java sources
Information:28/1/2020, 11:16 AM - Build completed with 1 error and 0 warnings in 3 s 499 ms
Error:java: Compilation failed: internal java compiler error

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile source: class A<T extends B> extends C { ... }

Where C is: class C<U extends V> { ... }

replace 'C' with 'C<extends W>' in A fixes it.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
 It should produce error/warning
ACTUAL -
Exception

---------- BEGIN SOURCE ----------
too complicated to provide. About 10 confidential classes involved. Would be considerable effort.
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Few my source code

FREQUENCY : always