0.13.0 format code cause webstorm exception

• WebStortm 2020.1.3
• Svelte Plugin 0.13.0

IDE display an exception when I format this code.

<script>
	let foo;
</script>


<div>
	{#if foo}
		<p>foo</p>
	{/if}
</div>

kotlin.NotImplementedError: An operation is not implemented: not implemented
	at dev.blachut.svelte.lang.format.SvelteBlockFakeXmlTag.getSubTags(SvelteBlockFakeXmlTag.kt:118)
	at com.intellij.psi.formatter.xml.HtmlPolicy.hasInlineContentOnly(HtmlPolicy.java:183)
	at com.intellij.psi.formatter.xml.HtmlPolicy.getWrappingTypeForTagBegin(HtmlPolicy.java:173)
	at com.intellij.psi.formatter.xml.AbstractSyntheticBlock.insertLineFeedAfter(AbstractSyntheticBlock.java:240)
	at com.intellij.psi.formatter.xml.AbstractSyntheticBlock.insertLineFeedAfter(AbstractSyntheticBlock.java:231)
	at com.intellij.psi.formatter.xml.XmlTagBlock.getSpacing(XmlTagBlock.java:313)
	at com.intellij.psi.formatter.xml.XmlTagBlock.getSpacing(XmlTagBlock.java:238)
	at com.intellij.formatting.InitialInfoBuilder.initCurrentWhiteSpace(InitialInfoBuilder.java:240)
	at com.intellij.formatting.InitialInfoBuilder.doIteration(InitialInfoBuilder.java:219)
	at com.intellij.formatting.InitialInfoBuilder.iteration(InitialInfoBuilder.java:118)
	at com.intellij.formatting.engine.WrapBlocksState.doIteration(WrapBlocksState.java:47)
	at com.intellij.formatting.engine.State.iteration(State.java:25)
	at com.intellij.formatting.engine.StateProcessor.iteration(StateProcessor.java:26)
	at com.intellij.formatting.FormatProcessor.iteration(FormatProcessor.java:107)
	at com.intellij.formatting.FormatterImpl$MyFormattingTask.iteration(FormatterImpl.java:705)
	at com.intellij.util.SequentialTask.iteration(SequentialTask.java:32)
	at com.intellij.util.SequentialModalProgressTask.lambda$doRun$0(SequentialModalProgressTask.java:73)
	at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:467)
	at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:485)
	at com.intellij.util.SequentialModalProgressTask.doRun(SequentialModalProgressTask.java:69)
	at com.intellij.util.SequentialModalProgressTask.run(SequentialModalProgressTask.java:46)
	at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:932)
	at com.intellij.openapi.progress.impl.CoreProgressManager$4.run(CoreProgressManager.java:482)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:166)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:627)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:572)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:61)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:153)
	at com.intellij.openapi.application.impl.ApplicationImpl.runProcessWithProgressSynchronously(ApplicationImpl.java:408)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:494)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcessWithProgressSynchronously(ProgressManagerImpl.java:84)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runSynchronously(CoreProgressManager.java:345)
	at com.intellij.openapi.progress.impl.CoreProgressManager.run(CoreProgressManager.java:330)
	at com.intellij.formatting.FormatterImpl.execute(FormatterImpl.java:287)
	at com.intellij.formatting.FormatterImpl.format(FormatterImpl.java:239)
	at com.intellij.psi.impl.source.codeStyle.CodeFormatterFacade.processText(CodeFormatterFacade.java:198)
	at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.lambda$reformatText$3(CodeStyleManagerImpl.java:217)
	at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.formatRanges(CodeStyleManagerImpl.java:251)
	at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.reformatText(CodeStyleManagerImpl.java:212)
	at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.reformatText(CodeStyleManagerImpl.java:176)
	at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.reformatText(CodeStyleManagerImpl.java:159)
	at com.intellij.codeInsight.actions.ReformatCodeProcessor.lambda$null$0(ReformatCodeProcessor.java:113)
	at com.intellij.openapi.editor.ex.util.EditorScrollingPositionKeeper.perform(EditorScrollingPositionKeeper.java:110)
	at com.intellij.codeInsight.actions.ReformatCodeProcessor.lambda$prepareTask$1(ReformatCodeProcessor.java:103)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at com.intellij.openapi.command.WriteCommandAction.lambda$runWriteCommandAction$5(WriteCommandAction.java:353)
	at com.intellij.openapi.command.WriteCommandAction$BuilderImpl$1.run(WriteCommandAction.java:107)
	at com.intellij.openapi.application.RunResult.run(RunResult.java:35)
	at com.intellij.openapi.command.WriteCommandAction.lambda$null$1(WriteCommandAction.java:248)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:976)
	at com.intellij.openapi.command.WriteCommandAction.lambda$performWriteCommandAction$2(WriteCommandAction.java:247)
	at com.intellij.openapi.command.WriteCommandAction.lambda$doExecuteCommand$4(WriteCommandAction.java:305)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:220)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:188)
	at com.intellij.openapi.command.WriteCommandAction.doExecuteCommand(WriteCommandAction.java:307)
	at com.intellij.openapi.command.WriteCommandAction.performWriteCommandAction(WriteCommandAction.java:246)
	at com.intellij.openapi.command.WriteCommandAction.execute(WriteCommandAction.java:227)
	at com.intellij.openapi.command.WriteCommandAction$BuilderImpl.run(WriteCommandAction.java:109)
	at com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(WriteCommandAction.java:353)
	at com.intellij.codeInsight.actions.AbstractLayoutCodeProcessor$ReformatFilesTask.lambda$performFileProcessing$5(AbstractLayoutCodeProcessor.java:413)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:201)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
	at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeAndWait$8(ApplicationImpl.java:480)
	at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:124)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:80)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:128)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
	at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:184)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:974)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:847)
	at com.intellij.ide.IdeEventQueue.lambda$null$8(IdeEventQueue.java:449)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:741)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[dishuostec]

I found the reason is I leave Preferences | Editor | Code Style | HTML -> Other -> Don't break if inline content: empty.

Here is a example dump:

<code_scheme name="foo" version="173">
  <HTMLCodeStyleSettings>
    <option name="HTML_DONT_ADD_BREAKS_IF_INLINE_CONTENT" value="" />
  </HTMLCodeStyleSettings>
  <editorconfig>
    <option name="ENABLED" value="false" />
  </editorconfig>
</code_scheme>

[tomblachut]

Next release will handle this specific exception