This seems un-related to asm.js. For the shorter test case below we get the use asm missing error which is expected.

function __f_9() {
}
function __f_10() {
  __v_9 = Wasm.instantiateModuleFromAsm( __f_9.toString());
}
__f_10();

The error specifically occurs in the following piece of code:
( {
})();
It occurs even without --expose-wasm

seems like problem in asm instantiate itself. Please ignore previous comments.

ClusterFuzz has detected this issue as fixed in range 38805:38806.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6718260089454592

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_dbg
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  !has_pending_exception() in isolate.cc
  
Regressed: V8: r34586:34587
Fixed: V8: r38805:38806

Minimized Testcase (0.32 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv94R2o0VRlP8sCjtx_zZ3hAtkzTQohzUruOK-uOmm3ug5nF8eEUkSTSZdw-P8Vi9HOfExg2HDhGuqh_xHN1oYFuwCtye8FEpNRQlU_w94HlVtf5_qFdhmxyWZ-Nl-dAxQBpt70TIeGFRZOD_RZoYyBjGK72e0g?testcase_id=6718260089454592
try {
(function __f_2 () {
})();
( {
})();
} catch(e) {; }
function __f_3() {
  return {
    then: function() {
    }
  };
}
try {
( {
})();
} catch(e) {; }
function __f_9() {
}
function __f_10() {
  try {
    __f_10();
  } catch(e) {
  __v_9 = Wasm.instantiateModuleFromAsm( __f_9.toString());
    /()()/.__f_10();
  }
}
__f_10();


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