11 quick tests are failing when compiling with gcc 5.4.1

[brunoalr]

11 tests failed
(╯°□°）╯︵ ┻━┻

�[0;33mSee the diffs:�[0m
cat hphp/test/quick/constructor_throw.php.diff
cat hphp/test/quick/fb_intercept.php.diff
cat hphp/test/quick/intercept2.php.diff
cat hphp/test/quick/profile/Setprofile.php.diff
cat hphp/test/quick/profile/Setprofile_async.php.diff
cat hphp/test/quick/profile/Setprofile_generic.php.diff
cat hphp/test/quick/profile/setprofile-this.php.diff
cat hphp/test/quick/profile/setprofile_throw.php.diff
cat hphp/test/quick/surprise_throw.php.diff
cat hphp/test/quick/xenon/xenon.php.diff
cat hphp/test/quick/xenon/xenon_init.php.diff

[racardoso]

that's odd those tests fails on gcc 5.4 or bellow if you remove r30 from clobber list. I test it here on gcc 6 and 5.4 and works. I don't have 5.4.1 anymore here. Please do a quick test try add r30 back here https://github.com/PPC64/hhvm/blob/next/hphp/util/portability.h#L192

[brunoalr]

I cannot compile it with gcc 5.4.1 if I include r30 in the clobber list. I'll compile with gcc 6 to check if the tests are failing as well.

PS: I'm on Ubuntu 16.10

[brunoalr]

I cannot compile with gcc6:

hhvm/third-party/re2/src/re2/dfa.cc:95:10: error: unknown array size in delete
   struct State {
          ^~~~~

[racardoso]

You must follow this guide https://github.com/PPC64/hhvm/wiki/Install-on-Ubuntu-system-16.10-(Experimental)

[brunoalr]

Followed the instructions (but I have Boost 1.58 installed) and managed to compile. Still having 11 errors:

11 tests failed
(╯°□°）╯︵ ┻━┻

See the diffs:
cat hphp/test/quick/constructor_throw.php.diff
cat hphp/test/quick/fb_intercept.php.diff
cat hphp/test/quick/intercept2.php.diff
cat hphp/test/quick/profile/Setprofile.php.diff
cat hphp/test/quick/profile/Setprofile_async.php.diff
cat hphp/test/quick/profile/Setprofile_generic.php.diff
cat hphp/test/quick/profile/setprofile-this.php.diff
cat hphp/test/quick/profile/setprofile_throw.php.diff
cat hphp/test/quick/surprise_throw.php.diff
cat hphp/test/quick/xenon/xenon.php.diff
cat hphp/test/quick/xenon/xenon_init.php.diff

[racardoso]

That's make no sense to me I tested it here with gcc 6 and Ubuntu 16.10 and have no failures. I will check this.

[racardoso]

Well find out that we have 11 tests failing. But I don't know if it's a clobber problem since I tested it before. Anyway I will fix it as soon I come back.