We have seen a repeated crash in freeing an Etext variable in XrdLink::Reset.

Xrootd Version is xrootd-server-4.6.1-1

Thread 503 (Thread 0x7f92be6fe700 (LWP 31214)):

#########################################################################
#5
#6 0x00007f94ad902ca3 in free () from /usr/lib64/libjemalloc.so.1
#7 0x00000031b0e62fff in XrdLink::Reset (this=0x7f929215b258) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdLink.cc:159
#8 0x00000031b0e6440d in XrdLink::Alloc (peer=..., opts=0) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdLink.cc:229
#9 0x00000031b0e62cd8 in XrdInet::Accept (this=0x7f94ad043080, opts=0, timeout=-1, theSem=0x7ffe448bf9a0) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdInet.cc:103
#10 0x000000000040c775 in XrdMain::DoIt (this=0x7ffe448bfa70) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdMain.cc:97
#11 0x00000031b0e68f9b in XrdScheduler::Run (this=0x6103f8) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdScheduler.cc:357
#12 0x00000031b0e690e9 in XrdStartWorking (carg=) at /usr/src/debug/xrootd/xrootd/src/Xrd/XrdScheduler.cc:87
#13 0x00000031b0e29c4f in XrdSysThread_Xeq (myargs=0x7f93a0bd6ca0) at /usr/src/debug/xrootd/xrootd/src/XrdSys/XrdSysPthread.cc:86
#14 0x00000031aee07aa1 in start_thread () from /lib64/libpthread.so.0
#15 0x00000031aeae8bcd in clone () from /lib64/libc.so.6

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