sourcemap for test.bc.js
/my/sourceRoot#b.ml:1:10 -> 17:   function f(x){<>return x - 1 | 0;}
/my/sourceRoot#b.ml:1:15 -> 34:   function f(x){return x - 1 | 0;<>}
/my/sourceRoot#b.ml:1:15 -> 0:<>   runtime.caml_register_global([0, f], "Testlib__B");
