Variable: debug-on-next-call
debug-on-next-call is a variable defined in eval.c.
Value
nil
Documentation
Non-nil means enter debugger before next eval, apply or funcall.
Source Code
// Defined in /usr/src/emacs/src/eval.c
DEFVAR_BOOL ("debug-on-next-call", debug_on_next_call,
doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */);