in regex-parser/src/jetbrains/teamcity/util/regex/RegexPattern.java [95:103]
public boolean processLine(@NotNull final String line, @NotNull final ParserManager parserManager) {
final Matcher matcher = getMatcher(line);
// pattern should cover the whole line
if (!(matcher.find() && matcher.group(0).length() == line.length()))
return false;
applyToManager(matcher, parserManager);
return myEatLine;
}