regex - perl regular expression to find real .error in log without missing interpreting -


i need write simple regular expression parse build log, error key:

error_key = .*error \w\d+.*|error

will mistakenly match: 

scanresult32 - 0 error(s), 145 warning(s)

i need watch text "." in front of error, "xxyyzz.error"

can show me how correct regular expression?

match literal . infront of error:

error_key = .*error \w\d+.*|\.error

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