I was working on a project (sublime-project open). At some point I deleted the folders from the project, then closed the project. Later I added a different folder to the sidebar (no new project). I typed "keymap" to open a keymap under Packages/Default. The name's found, but an empty file opens; I'd expect to see the actual file. What's worse, on close it prompts me to save edits (I did none), so I suppose the original file would be clobbered with an empty one.
How to reproduce
Maybe like explained above, but haven't tried more than once.