java.lang.IlegalStateException

[quaesitor-scientiam]

Describe the bug

As I type text produces error every few characters

Expected Behavior

No exceptions

Current Behavior

java.lang.IllegalStateException: @NotNull method com/intellij/psi/impl/PsiElementBase.notNullChild must not return null
at com.intellij.psi.impl.PsiElementBase.$$$reportNull$$$0(PsiElementBase.java)
at com.intellij.psi.impl.PsiElementBase.notNullChild(PsiElementBase.java:282)
at io.vlang.lang.psi.impl.VlangMethodDeclarationImpl.getSignature(VlangMethodDeclarationImpl.java:70)
at io.vlang.ide.inspections.unused.VlangUnusedParameterInspection$buildVisitor$1.visitMethodDeclaration(VlangUnusedParameterInspection.kt:18)
at io.vlang.lang.psi.impl.VlangMethodDeclarationImpl.accept(VlangMethodDeclarationImpl.java:28)
at io.vlang.lang.psi.impl.VlangMethodDeclarationImpl.accept(VlangMethodDeclarationImpl.java:33)
at com.intellij.codeInsight.daemon.impl.InspectionRunner$InspectionProblemHolder.visitElement(InspectionRunner.java:577)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$processContext$18(InspectionRunner.java:404)
at com.intellij.codeInsight.daemon.impl.InspectionVisitorOptimizer.acceptElements(InspectionVisitorOptimizer.java:200)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.processContext(InspectionRunner.java:402)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$inspect$7(InspectionRunner.java:177)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.tryRunReadAction(AnyThreadWriteThreadingSupport.kt:333)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:971)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$executeInImpatientReadAction$14(InspectionRunner.java:377)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.executeByImpatientReader(AnyThreadWriteThreadingSupport.kt:544)
at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:176)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$executeInImpatientReadAction$15(InspectionRunner.java:376)
at com.intellij.util.AstLoadingFilter.forceAllowTreeLoading(AstLoadingFilter.java:158)
at com.intellij.util.AstLoadingFilter.forceAllowTreeLoading(AstLoadingFilter.java:150)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$executeInImpatientReadAction$16(InspectionRunner.java:374)
at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:129)
at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:118)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.executeInImpatientReadAction(InspectionRunner.java:374)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$inspect$8(InspectionRunner.java:171)
at com.intellij.concurrency.ApplierCompleter.processArrayItem(ApplierCompleter.java:126)
at com.intellij.concurrency.ApplierCompleter.processArray(ApplierCompleter.java:207)
at com.intellij.concurrency.ApplierCompleter.execAll(ApplierCompleter.java:176)
at com.intellij.concurrency.JobLauncherImpl.lambda$invokeConcurrentlyUnderProgressAsync$3(JobLauncherImpl.java:108)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.tryRunReadAction(AnyThreadWriteThreadingSupport.kt:333)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:971)
at com.intellij.concurrency.ApplierCompleter.lambda$wrapInReadActionAndIndicator$2(ApplierCompleter.java:158)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$14(CoreProgressManager.java:674)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:749)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:705)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:673)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:79)
at com.intellij.concurrency.ApplierCompleter.wrapInReadActionAndIndicator(ApplierCompleter.java:169)
at com.intellij.concurrency.ApplierCompleter.lambda$wrapAndRun$1(ApplierCompleter.java:150)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.executeByImpatientReader(AnyThreadWriteThreadingSupport.kt:544)
at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:176)
at com.intellij.concurrency.ApplierCompleter.wrapAndRun(ApplierCompleter.java:150)
at com.intellij.concurrency.JobLauncherImpl.lambda$invokeConcurrentlyUnderProgressAsync$4(JobLauncherImpl.java:108)
at com.intellij.concurrency.JobLauncherImpl.safeIterate(JobLauncherImpl.java:176)
at com.intellij.concurrency.JobLauncherImpl.invokeConcurrentlyUnderProgressAsync(JobLauncherImpl.java:105)
at com.intellij.concurrency.JobLauncherImpl.processConcurrentlyAsync(JobLauncherImpl.java:467)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.lambda$inspect$11(InspectionRunner.java:188)
at com.intellij.codeInspection.InspectionEngine.withSession(InspectionEngine.java:205)
at com.intellij.codeInsight.daemon.impl.InspectionRunner.inspect(InspectionRunner.java:145)
at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.lambda$collectInformationWithProgress$4(LocalInspectionsPass.java:147)
at com.intellij.codeInsight.daemon.impl.HighlightInfoUpdaterImpl.lambda$runWithInvalidPsiRecycler$34(HighlightInfoUpdaterImpl.java:718)
at com.intellij.codeInsight.daemon.impl.ManagedHighlighterRecycler.runWithRecycler(ManagedHighlighterRecycler.java:85)
at com.intellij.codeInsight.daemon.impl.HighlightInfoUpdaterImpl.runWithInvalidPsiRecycler(HighlightInfoUpdaterImpl.java:700)
at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.collectInformationWithProgress(LocalInspectionsPass.java:159)
at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:86)
at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:67)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$2(PassExecutorService.java:427)
at com.intellij.platform.diagnostic.telemetry.helpers.TraceKt.use(trace.kt:30)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$3(PassExecutorService.java:423)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.tryRunReadAction(AnyThreadWriteThreadingSupport.kt:351)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:971)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$4(PassExecutorService.java:413)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$14(CoreProgressManager.java:674)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:749)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:705)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:673)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:79)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.doRun(PassExecutorService.java:412)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$0(PassExecutorService.java:388)
at com.intellij.openapi.fileTypes.impl.FileTypeManagerImpl.cacheFileTypesInside(FileTypeManagerImpl.java:822)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$1(PassExecutorService.java:388)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.executeByImpatientReader(AnyThreadWriteThreadingSupport.kt:544)
at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:176)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:386)
at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask$1.exec(JobLauncherImpl.java:266)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1491)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:2073)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2035)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187)

Reproduction Steps

` set_capability caps = none

}
fn (b &BaseOptions) default_capabilities() map[string]string {
return {}
}
fn (b &BaseOptions) set_cap

pub struct ArgOptions {
`
As type the word set_capability for a new function exceptions are continuously generated

Possible Solution

No idea

Additional Information/Context

If you need the whole file let me know

Environment details (v doctor output)

(Anaconda)PS S:> v doctor

V full version	V 0.4.9 45fd7eb.19ddcf4
OS	windows, Microsoft Windows 11 Pro 26100 64-bit
Processor	24 cpus, 64bit, little endian, AMD Ryzen 9 5900X 12-Core Processor
Memory	85.02GB/127.92GB
V executable	S:\repo\vlang\v.exe
V last modified time	2025-01-09 20:05:52
V home dir	OK, value: S:\repo\vlang
VMODULES	OK, value: C:\Users\john3.vmodules
VTMP	OK, value: C:\Users\john3\AppData\Local\Temp\v_0
Current working dir	OK, value: S:\
Git version	git version 2.45.1.windows.1
V git status	weekly.2024.53-87-g19ddcf45
.git/config present	true
cc version	N/A
gcc version	gcc (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r2) 14.2.0
clang version	(built by Brecht Sanders, r2) clang version 19.1.1
msvc version	N/A
tcc version	tcc version 0.9.27 (x86_64 Windows)
tcc git status	thirdparty-windows-amd64 b425ac82
emcc version	N/A
glibc version	ldd (cygwin) 2.5.0

IDE Type (IDEA Community/Ultimate, GoLand, CLion, etc.)

CLion 2024.3.1.1

Plugin Version

2024.3.1 custom build per your instructions

[Krotki]

Unfortunately I'm unable to reproduce this one. I suspect you had invalid v code in the editor and it was crashing. It would be nice to dig deeper, but I really would need whole file.