Format of messages posted to error_log?

[Scott Snow]

Sergey -
Thanks for the quick reply.

Note I am not asking after format of message content akin to what's available for access_log,
just the interpretation of the numerical parts of the apparent pattern in the error_log messages posted:
"[<severity>]  <number>#<number> : <message text>"

Perhaps you mean even the "[<severity>] <number>#<number>" isn't fixed or necessarily present; in that case, is there something distinguishing error_log entries that do not follow this pattern?

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