Igor, could you take a look?

ClusterFuzz has detected this issue as fixed in range 40170:40171.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6392828030877696

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_ignition_v8_arm_dbg
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  block->IsFinished() in hydrogen.cc
  
Regressed: V8: r40152:40153
Fixed: V8: r40170:40171

Minimized Testcase (0.27 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv973xgU71M5m-350CZ5a8_Zl80fOrjvaDvCfTSqq_S6zTEd3mvlHa16-_RHH4f0VAgg_DlMKlzhV0HqTgkWx3cOzgxqEXOkZAavEH08midGfxt38MIlByCs4hXjwl72E7ItokC1g36HDb1s22jvy05D5o2IQyw?testcase_id=6392828030877696
var __v_11 = this;
function __f_0() {
}
var __f_2 = (function() {
  return function __f_2() {
  }
})();
function __f_6(x) {
  var __v_5 = "value";
  return (x[__v_5] = 0) ? "ok" : "nope";
}
__v_6 = {};
 __f_6(__v_6); 
 __f_6(__v_11); 
%OptimizeFunctionOnNextCall(__f_6);
 __f_6(); 


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase is verified as fixed, closing issue.

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