GetAssemblyIndexFromAssemblyName crash

Crashlytics found some user crashes. I have converted libunity codes to full names but don't know what cause it

Unity Version 2018.1.5f1

 Caused by java.lang.Error: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 000000e0
 Build fingerprint: 'HOMTOM/HOMTOM/aeon6737m_65_m0:6.0/MRA58K/1480142084:user/release-keys'
 Revision: '0'
 pid: 19469, tid: 19498, name: AnalyticsHandle  
     r0 00000000  r1 e094c4e8  r2 f8742610  r3 00000055
     r4 df4df929  r5 00000000  r6 00000000  r7 e094c4e8
     r8 e094c504  r9 e094c520  sl 00000001  fp e094c7fc
     ip f874262a  sp e094c440  lr dec9f674  pc dec9f5dc  cpsr 0000000b
 
        at libunity.007d85dc(Unknown Source) GetAssemblyIndexFromAssemblyName
        at libunity.007d8670(Unknown Source) GetMonoClassWithAssemblyName
        at libunity.0099adc0(Unknown Source) scripting_class_from_fullname
        at libunity.00165a7c(Unknown Source) InitializeCoreScriptingClasses
        at libunity.001659e4(Unknown Source) GetCoreScriptingClassesPtr
        at libunity.001658a8(Unknown Source) GetCoreScriptingClasses
        at libunity.0013c994(Unknown Source) UnityJavaProxy_invoke
        at base.oatexec(oatexec)