Due to a fix for PR81766 there is now a second release candidate for GCC 7.2 available from
ftp://gcc.gnu.org/pub/gcc/snapshots/7.2-RC-20170808/ and shortly its mirrors. It has been generated from SVN revision 250958. I have so far bootstrapped and tested the release candidate on x86_64-unknown-linux-gnu. Please test it and report any issues to bugzilla. If all goes well I'd like to release 7.2 on Monday, August 14th.