NPE with nested instanceof patterns

[martint]

The following code:

public class ErrorProneBug
{
    record Struct(Object a) {}

    private ErrorProneBug() {}

    public static void method(Object x, Object y)
    {
        if (x instanceof Struct(Integer a1)) {
            if (y instanceof Struct(Integer a2)) {
                System.out.println("hello");
            }
        }
    }
}

Causes a failure:

error-prone version: 2.26.1
BugPattern: NestedInstanceOfConditions
Stack Trace:
java.lang.NullPointerException: Cannot invoke "com.sun.tools.javac.code.Type.isPrimitive()" because "t" is null
   	at jdk.compiler/com.sun.tools.javac.code.Types.eraseNotNeeded(Types.java:2388)
   	at jdk.compiler/com.sun.tools.javac.code.Types.erasure(Types.java:2381)
   	at com.google.errorprone.bugpatterns.NestedInstanceOfConditions$NestedInstanceOfMatcher.matches(NestedInstanceOfConditions.java:125)
   	at com.google.errorprone.matchers.Contains$FirstMatchingScanner.scan(Contains.java:58)
   	at com.google.errorprone.matchers.Contains$FirstMatchingScanner.scan(Contains.java:45)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
   	at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1104)
   	at com.google.errorprone.matchers.Contains.matches(Contains.java:41)
   	at com.google.errorprone.bugpatterns.NestedInstanceOfConditions.matchIf(NestedInstanceOfConditions.java:72)
   	at com.google.errorprone.scanner.ErrorProneScanner.processMatchers(ErrorProneScanner.java:449)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitIf(ErrorProneScanner.java:653)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitIf(ErrorProneScanner.java:150)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1584)
   	at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
   	at jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:520)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitBlock(ErrorProneScanner.java:150)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1104)
   	at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
   	at jdk.compiler/com.sun.source.util.TreeScanner.visitMethod(TreeScanner.java:224)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:740)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitMethod(ErrorProneScanner.java:150)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:948)
   	at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
   	at jdk.compiler/com.sun.source.util.TreeScanner.visitClass(TreeScanner.java:203)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:548)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitClass(ErrorProneScanner.java:150)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:855)
   	at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:92)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:74)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:48)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
   	at jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
   	at jdk.compiler/com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:152)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:560)
   	at com.google.errorprone.scanner.ErrorProneScanner.visitCompilationUnit(ErrorProneScanner.java:150)
   	at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:623)
   	at jdk.compiler/com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:66)
   	at com.google.errorprone.scanner.Scanner.scan(Scanner.java:58)
   	at com.google.errorprone.scanner.ErrorProneScannerTransformer.apply(ErrorProneScannerTransformer.java:43)
   	at com.google.errorprone.ErrorProneAnalyzer.finished(ErrorProneAnalyzer.java:156)
   	at jdk.compiler/com.sun.tools.javac.api.MultiTaskListener.finished(MultiTaskListener.java:133)
   	at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1436)
   	at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.flow(JavaCompiler.java:1383)
   	at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:963)
   	at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0(JavacTaskImpl.java:104)
   	at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.invocationHelper(JavacTaskImpl.java:152)
   	at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:100)
   	at jdk.compiler/com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:94)
   	at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:126)
   	at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:214)
   	at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:1228)
   	at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:215)
   	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:126)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:328)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:316)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:174)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.access$000(MojoExecutor.java:75)
   	at org.apache.maven.lifecycle.internal.MojoExecutor$1.run(MojoExecutor.java:162)
   	at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute(DefaultMojosExecutionStrategy.java:39)
   	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:159)
   	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:105)
   	at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:193)
   	at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:180)
   	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
   	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
   	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
   	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
   	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
   	at java.base/java.lang.Thread.run(Thread.java:1583)