[Bug go/61303] gccgo: segfault, regression since 4.8.2

[ian at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61303

--- Comment #10 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu Nov 26 00:24:21 2015
New Revision: 230922

URL: https://gcc.gnu.org/viewcvs?rev=230922&root=gcc&view=rev
Log:
        PR go/61303
    runtime: don't overallocate in select code

    If we've already allocated an fd_set, don't allocate another one.

    Also, don't bother to read from rdwake if it wasn't returned in select.

    Fixes https://gcc.gnu.org/PR61303.

    Reviewed-on: https://go-review.googlesource.com/17243

Modified:
    trunk/gcc/go/gofrontend/MERGE
    trunk/libgo/runtime/netpoll_select.c