Suspecting the below from code search on "escape-analysis.cc".
Review-Url: https://codereview.chromium.org/2571793002
tebbi@: Could you please take a look into this if its related to your change.

ClusterFuzz has detected this issue as fixed in range 42065:42066.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5178710966927360

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_dbg
Platform Id: linux

Crash Type: Unreachable code
Crash Address: 
Crash State:
  escape-analysis.cc
  
Sanitizer: address (ASAN)

Regressed: V8: r41908:41909
Fixed: V8: r42065:42066

Minimized Testcase (0.13 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv94rsFseuyR3sTP6gonNklzpDicLy3SK2mZzxzXjgRoYI4OjeGuex9HU_H4waEwONIx6fF1tdl3j_tgRjsj1CVESjc6GboRj1kImD6AIIWJBhOGFnj-8-Bmi2syLFxlq2D58lFBNSIYnKLtO_UZvzRXIr8mzoCmcUwH7YsVTxozyDAqRfFarIoGwmzt8LaNKGunvC7KpM4dsIsxdLoqgKIduAUHVs0jc4WQOPKdkCvmV0CXrsugZV3P-Xsuo4NYUFq7l_PDBYjO8nYaZOpaGOPn4eqY2PPDtdVBI_l5mZyZgY-A4sHwEQtR5UQIUvltx5okrR9HsjOeKtyd1fPcrV_oSWWBx_iPFiqnVoh2FNC_jWQJZm4Y?testcase_id=5178710966927360
var __v_3 = [];
var __v_5 = {};
__v_12 = "Foo";
for (var __v_2 = 0; __v_3 < 10; __v_5++) {
(__v_12[0] + "BarBazQuuxFooBarQuux")[0];
}


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 5178710966927360 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.