It appears to have been fixed in 5.8.0. 
$1 = '' (defined)
$2 = 'bbbbb'
@- = (1, 1, 1)
@+ = (7, 1, 6)

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In reply to Re^4: Strange result from "abbbbbc" =~ /(b)*?(b*?)c/ by ikegami
in thread Strange result from "abbbbbc" =~ /(b)*?(b*?)c/ by mcovic

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