This screenshot of the Rename Package refactoring shows how this automated refactoring warns the user about a name conflict immediately the first input page.
RenamePackageWarnsAboutNameConflictEarly.png (image/png), 32.64 KB, created by Mohsen Vakilian CLA on 2013-02-19 23:59:34 EST
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Creator: Mohsen Vakilian CLA
Created: 2013-02-19 23:59:34 EST
Size: 32.64 KB
Actions: View
Attachments on bug 401262: 227311