Homebrew 2.9.0 upgrade failed

[chenrui333]

relates to Homebrew/homebrew-core#40075

Compiling /private/tmp/riak-20190519-82810-z0c3fg/distdir/riak-2.9.0/deps/hyper/src/hyper_gb.erl failed:
/private/tmp/riak-20190519-82810-z0c3fg/distdir/riak-2.9.0/deps/hyper/src/hyper_gb.erl:70: type gb_tree/0 is deprecated and will be removed in OTP 18.0; use use gb_trees:tree/0 or preferably gb_trees:tree/2
ERROR: compile failed while processing /private/tmp/riak-20190519-82810-z0c3fg/distdir/riak-2.9.0/deps/hyper: rebar_abort
make[4]: *** [compile] Error 1
make[3]: *** [buildrel] Error 2
make[2]: *** [bootstrap] Error 2
make[1]: *** [ostype] Error 2
make: *** [package] Error 2

Need some eyes on the brew upgrade process.

[martinsumner]

Is this still an issue? Do you have any more details?

[chenrui333]

we ended up removing the formula, Homebrew/homebrew-core#46552