D45918.diff
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	diff --git a/sys/ddb/db_command.c b/sys/ddb/db_command.c
	--- a/sys/ddb/db_command.c
	+++ b/sys/ddb/db_command.c
	@@ -580,6 +580,7 @@
	db_printf("%s", s);
	db_flush_lex();
	kdb_reenter_silent();
	+ panic("%s: did not reenter debugger", __func__);
	}

	static void
	diff --git a/sys/ddb/ddb.h b/sys/ddb/ddb.h
	--- a/sys/ddb/ddb.h
	+++ b/sys/ddb/ddb.h
	@@ -233,7 +233,7 @@
	void db_clear_watchpoints(void);
	db_addr_t db_disasm(db_addr_t loc, bool altfmt);
	/* instruction disassembler */
	-void db_error(const char *s);
	+void db_error(const char *s) __dead2;
	int db_expression(db_expr_t *valuep);
	int db_getc(void);
	int db_get_variable(db_expr_t *valuep);