Variable: debug-on-message

debug-on-message is a variable defined in xdisp.c.

Value

nil

Documentation

If non-nil, debug if a message matching this regexp is displayed.

Probably introduced at or before Emacs version 24.3.

Source Code

// Defined in /usr/src/emacs/src/xdisp.c
  DEFVAR_LISP ("debug-on-message", Vdebug_on_message,
	       doc: /* If non-nil, debug if a message matching this regexp is displayed.  */);