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If printable range is set to 'unicode', the simple error logger will now
recognize code points > 255 and print lists containing these as strings.
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Calling error_logger:limit_term/1 before sending terms as events to
the error_logger can be used for limiting the size of the messages.
Doing so will not change the output, but potentially save memory.
The Kernel variable error_logger_format_depth is used when limiting
the size of terms.
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Performance for processes that receive huge amounts of
messages can be increased by storing the incoming messages
outside the heap (that avoids copying the message in a
garbage collection).
Two OTP processes that are known to receive many messages
are 'rex' (used by 'rpc') and 'error_logger'.
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* legoscia/prettier-default-error-logger/OTP-13325:
Prettify default error_logger output somewhat
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The default error logger, the one in use before a more sophisticated
error logger can be installed, has rather terse output, in part because
it cannot rely on io:format. This patch attempts to improve the error
logger within that constraint:
- Print timestamps as YYYY-MM-DD HH:MM:SS
- For error reports with format strings, just print the format string
and the format arguments on separate lines
- For error reports with tuple lists, print each pair on a separate line
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If the file given by the Kernel application variable 'error_logger'
cannot be opened a crash will occur.
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