This came up in #1238...

@behindthepage in https://github.com/backdrop/backdrop-issues/issues/1238#issuecomment-142...

... I think paths should be checked when views or layouts are being installed. I think it is more likely to duplicate a path when installing a view or a layout than having conflicting config file names and this too can be solved with a bit more code during the copying of the config files. Maybe we can change the new path to duplicate_0 and set a message during install.

@quicksketch in https://github.com/backdrop/backdrop-issues/issues/1238#issuecomment-142...

Let's make an issue for this one in particular. I think we may be able to do a check, but doing a validation before installation may be difficult because each type of thing makes a menu path differently. It's only when they're all consolidated into hook_menu() that you have the full list. And then each module could have duplicates within it as well (two views at the same path, two layouts at the same path, etc.)

GitHub Issue #: 
1257