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Here, the wakePend variable is written to without a lock: https://github.com/xrootd/xrootd/blob/master/src/XrdSys/XrdSysIOEventsPollE.icc#L210 while here, it's read with a lock: https://github.com/xrootd/xrootd/blob/master/src/XrdSys/XrdSysIOEvents.cc#L1162 This causes undefined behavior according to the C++11 standard and is illegal. --- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/167 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1