I was just running nm over all of /usr/lib on a system with C in malloc flags and ran into this.
$ MALLOC_OPTIONS=C nm -s libc.so.89.3.a Archive index: _thread_sys___semctl in __semctl.so __semctl in __semctl.so ><...snip...> _libc_xdr_ypresp_master in xdr_ypresp_master.so _libc_xdr_ypresp_order in xdr_ypresp_order.so _libc_xdr_ypresp_val in xdr_ypresp_val.so _libc_xdr_ypstat in xdr_ypstat.so nm(98959) in free(): chunk canary corrupted 0x3e6e6845580 0x19@0x19 Abort trap (core dumped) gzipped file is at https://junkpile.org/libc.so.89.3.a.gz if anyone's interested.
