Variable: internal-when-entered-debugger
internal-when-entered-debugger is a variable defined in eval.c.
Value
-1
Documentation
The number of keyboard events as of last time debugger was called.
Used to avoid infinite loops if the debugger itself has an error. Don't set this unless you're sure that can't happen.
Source Code
// Defined in /usr/src/emacs/src/eval.c
DEFVAR_INT ("internal-when-entered-debugger", when_entered_debugger,
doc: /* The number of keyboard events as of last time `debugger' was called.
Used to avoid infinite loops if the debugger itself has an error.
Don't set this unless you're sure that can't happen. */);