fix index out-of-bounds in startAttachingCrashLogMessages #3006
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Task/Issue URL: https://app.asana.com/0/414709148257752/1207877553454228/f
BSK PR: duckduckgo/BrowserServicesKit#906
Description:
Fixes Out-of-bounds exception when no records in crashDiagnostics array
Steps to test this PR:
Simulate a crash in App Store target with debugger detached
Set a breakpoint at CrashCollection.swift:122 and remove items from crashDiagnostics array (using LLDB: po crashDiagnostics.removeAll())
validate the code is not crashing when adding a record to the array
Definition of Done:
Internal references:
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