Unable to find any possible suspect from the bisect range and unable to do code search for the file "xfa_simpleexpression.cpp"

Cc'ing owners of the file. request to please take a look into it.

ClusterFuzz has detected this issue as fixed in range 379054:379821.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4831239225212928

Fuzzer: libfuzzer_pdf_fm2js_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  CXFA_FMAdditiveExpression::ToJavaScript
  CXFA_FMAssignExpression::ToJavaScript
  CXFA_FMAssignExpression::ToImpliedReturnJS
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=375725:375769
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=379054:379821

Minimized Testcase (0.01 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95kjOK21jXEKPJqFkDNy8QgLvWVCPYaPYBFmt09d8EQgZiYfvmFK3bAYirqQLTDGrZcgUQ3EIJnoclxqg299zYWt49z0Q1eFGb5K1a1BLCXWQSI5E1t9Et5m2mr_89Qxm6MelGzPeiV7qIKgZLdiPQkRSXB7A
()-'on=qen=nti!


See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

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

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