severity 36145 minor
tags 36145 + patch
quit

> Although it is possible to trigger another backtrace if the first one
> was from calling `debug' directly, e.g., M-: (debug) RET.

And it's also possible to trigger another backtrace with 'e', if using
it from a frame above the debugger's.  I bump into this every so often
by accident, and it's quite annoying.  Of course, I'm always in the
middle of debugging something else so I forget about it, but I'd like to
change it.  Patch attached.