Created attachment 71477 [details]
stacktrace

Could you attach a test class for verifying purposes?

Build: NetBeans IDE Dev (Build 200810240201)
VM: Java HotSpot(TM) Client VM, 11.0-b15, Java(TM) SE Runtime Environment, 1.6.0_10-rc2-b32
OS: Windows Vista, 6.0, x86

User Comments: 
Refactor-> Undo Rename on a method inside gaurded block

Stacktrace: 
java.lang.RuntimeException
        at org.netbeans.modules.refactoring.java.plugins.RetoucheCommit.rollback(RetoucheCommit.java:100)
        at org.netbeans.modules.refactoring.api.RefactoringSession.undoRefactoring(RefactoringSession.java:163)
        at org.netbeans.modules.refactoring.spi.impl.UndoManager$SessionUndoItem.undo(UndoManager.java:596)
        at org.netbeans.modules.refactoring.spi.impl.UndoManager.undo(UndoManager.java:221)
        at org.netbeans.modules.refactoring.spi.impl.UndoAction.performAction(UndoAction.java:96)
        at org.openide.util.actions.CallableSystemAction$.run(CallableSystemAction.java:118)

Created attachment 72756 [details]
stacktrace

Build: NetBeans IDE Dev (Build 200905100201)
VM: Java HotSpot(TM) Client VM, 11.3-b02, Java(TM) SE Runtime Environment, 1.6.0_13-b02
OS: Windows XP, 5.1, x86

User Comments: 
To reproduce:
- create Mobile Application with Hello MIDlet;
- in Flow, select form and invoke Rename popup menu command;
- set a new name, perform refactoring;
- in Projects tree, select HelloMIDlet.java and invoke 'Refactor|Undo'.


Stacktrace: 
org.openide.util.RequestProcessor$Item: task failed: java.lang.RuntimeException
        at org.openide.util.RequestProcessor$Item.fillInStackTrace(RequestProcessor.java:853)
        at java.lang.Throwable.<init>(Throwable.java:181)
        at java.lang.Exception.<init>(Exception.java:29)
        at org.openide.util.RequestProcessor$Item.<init>(RequestProcessor.java:819)
        at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:629)
        at org.openide.util.RequestProcessor.post(RequestProcessor.java:295)

Created attachment 82137 [details]
stacktrace

Build: NetBeans IDE Dev (Build 200908171401)
VM: Java HotSpot(TM) Client VM, 14.0-b16, Java(TM) SE Runtime Environment, 1.6.0_14-b08
OS: Linux, 2.6.28-11-generic, i386

User Comments: 
I have created a class extending a JPanel. Then I added a JList in a designer "jList1". I switched to editor and wrote some code that use this variable name.

Then I invoked Ctrl+R above this variable to rename it. I renamed the variable, but it was not successful (guarded code was not updated), so I invoked Refactor>Undo

Stacktrace: 
java.lang.Throwable: Locked by:
        at org.openide.filesystems.FileLock.<init>(FileLock.java:80)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.<init>(LockForFile.java:89)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:100)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:313)
        at org.openide.loaders.MultiDataObject$Entry.takeLock(MultiDataObject.java:1189)
        at org.netbeans.modules.form.FormEditorSupport$Environment.takeLock(FormEditorSupport.java:1369)

Created attachment 86479 [details]
stacktrace

This issue already has 5 duplicates 
see http://statistics.netbeans.org/exceptions/detail.do?id=125648

Thank you for the reproducible test case with form file. I will investigate.

It seems to be a problem in the form editor support that does not release the file lock. If you choose the Save Document
action manually then changes propagate as expected. In case of plain java file the rename works. Reassigning.

Build: NetBeans IDE Dev (Build nbms-and-javadoc-3940-on-090917)
VM: Java HotSpot(TM) Client VM, 14.2-b01, Java(TM) SE Runtime Environment, 1.6.0_16-b01
OS: Linux, 2.6.28-15-generic, i386

User Comments: 
undo rename

Stacktrace: 
java.lang.Throwable: Locked by:
        at org.openide.filesystems.FileLock.<init>(FileLock.java:80)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.<init>(LockForFile.java:89)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:100)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:313)
        at org.openide.loaders.MultiDataObject$Entry.takeLock(MultiDataObject.java:1189)
        at org.netbeans.modules.form.FormEditorSupport$Environment.takeLock(FormEditorSupport.java:1370)

Created attachment 87862 [details]
stacktrace

This issue already has 6 duplicates 
see http://statistics.netbeans.org/exceptions/detail.do?id=125648

Created attachment 92120 [details]
stacktrace

Rename de uma classe

Created attachment 93586 [details]
stacktrace

I tried to rename field, which declaration is in guarded block. There is no warning, that I cannot do that and refactoring is done only in non-guarded sections (breaking the code). Both Undo (editor and refactoring) did not work for me.

Created attachment 107832 [details]
stacktrace

1. Create new project: main menu File | New Project... | Java, Java Application | Next (leave all default) | Finish
2. Create new JFrame in main package (by default javaapplication1): invoke popup menu on package node in Projects view | New | JFrame Form... (leave all by default) | Finish
3. NewJFrame.java should be created and Design button pushed (main menu View | Editors | Design). From Palette window | Swing Controls grab Button and drop it somwhere inside the NewJFrame.
4. Push the Source button (main menu View | Editors | Source)
5. Copy and paste this code:

    public void foo(){
        JButton jButton1= new JButton();
        JButton jButton2= jButton1;
    }
    
    public void foo2(){
        String neco=this.jButton1.getText();
    }

somewhere to NewJFrame class (e.g. below constructor).

6. Invoke Refactor | Rename from popup menu on jButton1 in method foo2.
7. Enter new name (e.g. tlacitkooo). Preview the changes and perform Refactor.
8. Call main menu Refactor | Undo.

Created attachment 107833 [details]
stacktrace

Product Version: NetBeans IDE Dev (Build 201104180401)
Java: 1.6.0_25; Java HotSpot(TM) Client VM 20.0-b11
System: Linux version 2.6.32-30-generic running on i386; UTF-8; en_US (nb)

1. Create new project: main menu File | New Project... | Java, Java Application | Next (leave all default) | Finish
2. Create new JFrame in main package (by default javaapplication1): invoke popup menu on package node in Projects view | New | JFrame Form... (leave all by default) | Finish
3. NewJFrame.java should be created and Design button pushed (main menu View | Editors | Design). From Palette window | Swing Controls grab Button and drop it somwhere inside the NewJFrame.
4. Push the Source button (main menu View | Editors | Source)
5. Copy and paste this code:

    public void foo(){
        JButton jButton1= new JButton();
        JButton jButton2= jButton1;
    }
    
    public void foo2(){
        String neco=this.jButton1.getText();
    }

somewhere to NewJFrame class (e.g. below constructor).

6.

Created attachment 108082 [details]
stacktrace

Tried undo Encapsulate Fields.

Updated to 7.0 as it was reproduced on that release.

There is no special refactoring undo action since 7.2, it's done by the Edit | Undo action. The problem is that the GUI builder resets the editor undo queue when generating code - which it does during refactoring. So undo of refactoring is currently not possible when a GUI form is involved.