open Lib;;
if not false then 0 else raise Not_found;;
(**
0 CONSTINT 42
2 PUSHACC0
3 MAKEBLOCK1 0
5 POP 1
7 SETGLOBAL Lib
9 CONST0
10 BRANCHIF 15
12 CONST0
13 BRANCH 20
15 GETGLOBAL Not_found
17 MAKEBLOCK1 0
19 RAISE
20 ATOM0
21 SETGLOBAL T070-branchif
23 STOP
**)