Github user bodewig commented on a diff in the pull request: https://github.com/apache/ant/pull/58#discussion_r166216151 --- Diff: src/main/org/apache/tools/ant/listener/MailLogger.java --- @@ -102,7 +102,7 @@ private static final String DEFAULT_MIME_TYPE = "text/plain"; /** Buffer in which the message is constructed prior to sending */ - private StringBuffer buffer = new StringBuffer(); + private StringBuilder buffer = new StringBuilder(); --- End diff -- Given the `parallel` task and things like our execute framework that spawns new threads, loggers need to be thread safe, But to be honest I don't think we've ever verified `MailLogger` actually is.
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