exception when editing Go file with structure view open

[sjamesr]

The IDE gets a PsiInvalidElementAccessException when adding a field to a struct when the structure viewer is open. Here is the exception:

Element: class com.goide.psi.impl.GoAnonymousFieldDefinitionImpl because: parent is null
invalidated at: see attachment
com.intellij.psi.PsiInvalidElementAccessException: Element: class com.goide.psi.impl.GoAnonymousFieldDefinitionImpl because: parent is null
invalidated at: see attachment
    at com.intellij.extapi.psi.StubBasedPsiElementBase.getContainingFile(StubBasedPsiElementBase.java:254)
    at com.goide.psi.impl.GoStubbedElementImpl.getContainingFile(GoStubbedElementImpl.java:109)
    at com.goide.psi.impl.GoStubbedElementImpl.getContainingFile(GoStubbedElementImpl.java:37)
    at com.intellij.extapi.psi.StubBasedPsiElementBase.isPhysical(StubBasedPsiElementBase.java:294)
    at com.intellij.psi.util.CachedValuesManager$1.compute(CachedValuesManager.java:137)
    at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
    at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:222)
    at com.intellij.psi.impl.PsiCachedValue.getValueWithLock(PsiCachedValue.java:66)
    at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
    at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:129)
    at com.goide.psi.impl.GoNamedElementImpl.getGoType(GoNamedElementImpl.java:115)
    at com.goide.tree.GoStructureViewFactory$Element.getPresentationTextInner(GoStructureViewFactory.java:250)
    at com.goide.tree.GoStructureViewFactory$Element.getPresentableText(GoStructureViewFactory.java:227)
    at com.intellij.ide.projectView.PresentationData.updateFrom(PresentationData.java:183)
    at com.intellij.ide.util.treeView.smartTree.TreeElementWrapper.update(TreeElementWrapper.java:41)

The attachment it refers to looks like:

java.lang.Throwable
    at com.intellij.psi.impl.DebugUtil.startPsiModification(DebugUtil.java:530)
    at com.intellij.pom.core.impl.PomModelImpl.runTransaction(PomModelImpl.java:147)
    at com.intellij.psi.impl.DocumentCommitProcessor$2.run(DocumentCommitProcessor.java:224)
    at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl$8.compute(CodeStyleManagerImpl.java:682)
    at com.intellij.psi.impl.source.PostprocessReformattingAspect.disablePostprocessFormattingInside(PostprocessReformattingAspect.java:124)
    at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl$10.compute(CodeStyleManagerImpl.java:717)
    at com.intellij.formatting.FormatterImpl.runWithFormattingDisabled(FormatterImpl.java:924)
    at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.performActionWithFormatterDisabled(CodeStyleManagerImpl.java:713)
    at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.performActionWithFormatterDisabled(CodeStyleManagerImpl.java:679)
    at com.intellij.psi.impl.DocumentCommitProcessor.doActualPsiChange(DocumentCommitProcessor.java:209)
    at com.intellij.psi.impl.DocumentCommitProcessor$1.process(DocumentCommitProcessor.java:145)
    at com.intellij.psi.impl.DocumentCommitProcessor$1.process(DocumentCommitProcessor.java:135)
    at com.intellij.psi.impl.PsiDocumentManagerBase.finishCommitInWriteAction(PsiDocumentManagerBase.java:333)
    at com.intellij.psi.impl.PsiDocumentManagerImpl.finishCommitInWriteAction(PsiDocumentManagerImpl.java:143)
    at com.intellij.psi.impl.PsiDocumentManagerBase$3.run(PsiDocumentManagerBase.java:298)
    at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1002)
    at com.intellij.psi.impl.PsiDocumentManagerBase.finishCommit(PsiDocumentManagerBase.java:295)
    at com.intellij.psi.impl.DocumentCommitThread$5.run(DocumentCommitThread.java:528)

Steps to reproduce:

1. create a new empty Go file
2. open the structure viewer
3. enter the following code

package main

type foo struct {
    bar string<caret>
}

While typing bar string you will get an exception like the one above. You can also reproduce by adding a field to an existing struct in some Go file.

[ignatov]

Can't reproduce with the latest master.

[zolotov]

Recreated and fixed