Language API and formatting: getChildAttributes never called?

I see that an exception is thrown whenever I press Enter - what am I doing wrong?

This trace is from 3436 IDEA 5.0:

-2
java.lang.ArrayIndexOutOfBoundsException: -2
at java.util.ArrayList.get(ArrayList.java:324)
at com.intellij.formatting.FormatProcessor.a(FormatProcessor.java:198)
at com.intellij.formatting.FormatProcessor.a(FormatProcessor.java:233)
at com.intellij.formatting.FormatProcessor.getIndentAt(FormatProcessor.java:133)
at com.intellij.formatting.FormatterImpl.adjustLineIndent(FormatterImpl.java:200)
at com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.adjustLineIndent(CodeStyleManagerImpl.java:359)
at com.intellij.codeInsight.editorActions.EnterHandler$DoEnterAction.run(EnterHandler.java:19)
at com.intellij.codeInsight.editorActions.EnterHandler.executeWriteAction(EnterHandler.java:174)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:52)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:438)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.execute(EditorWriteActionHandler.java:36)
at com.intellij.codeInsight.template.impl.TemplateManagerActions$EnterHandler.executeWriteAction(TemplateManagerActions.java:7)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:52)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:438)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.execute(EditorWriteActionHandler.java:36)
at com.intellij.openapi.editor.actionSystem.EditorAction$1.run(EditorAction.java:51)
at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:30)
at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:84)
at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:57)
at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:42)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.a(IdeKeyEventDispatcher.java:29)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.b(IdeKeyEventDispatcher.java:189)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:38)
at com.intellij.ide.IdeEventQueue.a(IdeEventQueue.java:79)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:160)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Hello Keith,

KL> I see that an exception is thrown whenever I press Enter - what am I
KL> doing wrong?
KL>
KL> This trace is from 3436 IDEA 5.0:
KL>
KL> -2
KL> java.lang.ArrayIndexOutOfBoundsException: -2
KL> at java.util.ArrayList.get(ArrayList.java:324)
KL> at
KL> com.intellij.formatting.FormatProcessor.a(FormatProcessor.java:198)

This exception happens because some block cannot be found in the list returned
by getSubBlocks() of its parent block. In the current version of IDEA, you
must return the same list of child blocks when getSubBlocks() is repeatedly
called on a particular Block instance. (This requirement wasn't documented
- I'll add it to the documentation for the next build.)

--
Dmitry Jemerov
Software Developer
JetBrains, Inc.
http://www.jetbrains.com
"Develop with pleasure!"

Dmitry Jemerov (JetBrains) wrote:

Hello Keith,

KL> I see that an exception is thrown whenever I press Enter - what am I
KL> doing wrong?
KL> KL> This trace is from 3436 IDEA 5.0:
KL> KL> -2
KL> java.lang.ArrayIndexOutOfBoundsException: -2
KL> at java.util.ArrayList.get(ArrayList.java:324)
KL> at
KL> com.intellij.formatting.FormatProcessor.a(FormatProcessor.java:198)

This exception happens because some block cannot be found in the list
returned by getSubBlocks() of its parent block. In the current version
of IDEA, you must return the same list of child blocks when
getSubBlocks() is repeatedly called on a particular Block instance.
(This requirement wasn't documented - I'll add it to the documentation
for the next build.)

Thank you! It works great now.