DEFVAR_LISP ("debug-on-error", &Vdebug_on_error,
"*Non-nil means enter debugger if an error is signaled.\n\
-Does not apply to errors handled by `condition-case'.\n\
+Does not apply to errors handled by `condition-case' or those\n\
+matched by `debug-ignored-errors'.\n\
If the value is a list, an error only means to enter the debugger\n\
if one of its condition symbols appears in the list.\n\
See also variable `debug-on-quit'.");