Reformatting failure on save in version 2.27.0

What happened?

Setup:

• macOS Monterey 12.6 (Intel)
• Tools > Actions on Save > Reformat code (changed lines)
• Editor > Code Style > Scheme > GoogleStyle (IDE)

As reported by Intellij (IntelliJ IDEA 2021.3.3):

java.lang.Throwable: Assertion failed: Write access is allowed inside write-action only (see com.intellij.openapi.application.Application.runWriteAction())
	at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:218)
	at com.intellij.openapi.application.impl.ApplicationImpl.assertWriteAccessAllowed(ApplicationImpl.java:1256)
	at com.palantir.javaformat.intellij.PalantirCodeStyleManager.formatInternal(PalantirCodeStyleManager.java:169)
	at com.palantir.javaformat.intellij.PalantirCodeStyleManager.reformatText(PalantirCodeStyleManager.java:110)
	at com.google.googlejavaformat.intellij.CodeStyleManagerDecorator.reformatText(CodeStyleManagerDecorator.java:90)
	at com.google.googlejavaformat.intellij.GoogleJavaFormatCodeStyleManager.reformatText(GoogleJavaFormatCodeStyleManager.java:61)
	at com.intellij.codeInsight.editorActions.FixDocCommentAction.lambda$reformatCommentKeepingEmptyTags$3(FixDocCommentAction.java:246)
	at com.intellij.application.options.CodeStyle.doWithTemporarySettings(CodeStyle.java:338)
	at com.intellij.codeInsight.editorActions.FixDocCommentAction.reformatCommentKeepingEmptyTags(FixDocCommentAction.java:236)
	at com.intellij.codeInsight.editorActions.FixDocCommentAction.generateComment(FixDocCommentAction.java:222)
	at com.intellij.codeInsight.editorActions.FixDocCommentAction.lambda$generateOrFixComment$0(FixDocCommentAction.java:113)
	at com.intellij.codeInsight.editorActions.FixDocCommentAction.generateOrFixComment(FixDocCommentAction.java:125)
	at com.intellij.codeInsight.intention.impl.AddJavadocIntention.invoke(AddJavadocIntention.java:20)
	at com.intellij.codeInsight.intention.BaseElementAtCaretIntentionAction.invoke(BaseElementAtCaretIntentionAction.java:76)
	at com.intellij.codeInsight.intention.IntentionAction.invokeForPreview(IntentionAction.java:114)
	at com.intellij.codeInsight.intention.impl.preview.IntentionPreviewComputable.generatePreview(IntentionPreviewComputable.kt:95)
	at com.intellij.codeInsight.intention.impl.preview.IntentionPreviewComputable.tryCreateDiffContent(IntentionPreviewComputable.kt:60)
	at com.intellij.codeInsight.intention.impl.preview.IntentionPreviewComputable.call(IntentionPreviewComputable.kt:35)
	at com.intellij.codeInsight.intention.impl.preview.IntentionPreviewComputable.call(IntentionPreviewComputable.kt:30)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:521)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$attemptComputation$3(NonBlockingReadActionImpl.java:486)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1084)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runInReadActionWithWriteActionPriority$0(ProgressIndicatorUtils.java:75)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:158)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:115)
	at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:57)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:624)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:698)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:646)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:623)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
	at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:57)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:112)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:75)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:486)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$transferToBgThread$1(NonBlockingReadActionImpl.java:407)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:829)

What did you want to happen?

In my case, a more graceful handling would be a better user experience, i.e. retry, info message on how to redo the action, etc.

Start with the stack trace at com.palantir.javaformat.intellij.PalantirCodeStyleManager.formatInternal and trace the reformatText calls from IntelliJ's save and intention-preview actions. Reproduce on IntelliJ IDEA 2021.3.3 with Actions on Save and the GoogleStyle scheme enabled. Done means the assertion is handled more gracefully, with the intended retry or guidance behavior verified in the reported scenario.