Mode for backtrace buffers, selected in debugger.
A line starts with `*' if exiting that frame will call the debugger.
Type b or u to set or remove the `*'.
When in debugger due to frame being exited,
use the r command to override the value
being returned from that frame.
Use M-x debug-on-entry and M-x cancel-debug-on-entry to control
which functions will enter the debugger when called.
Complete list of commands:
key binding
--- -------
0 .. 9 digit-argument
TAB forward-button
RET debug-help-follow
ESC Prefix Command
SPC next-line
- negative-argument
R debugger-record-expression
b debugger-frame
c debugger-continue
d debugger-step-through
e debugger-eval-expression
h describe-mode
j debugger-jump
l debugger-list-functions
q top-level
r debugger-return-value
u debugger-frame-clear