Task::Plack cannot be installed on Perl 5.22 because of Coro

[basic6]

Task::Plack cannot be installed because it depends on Coro, which fails to build:

...
Running Mkbootstrap for Coro::State ()
chmod 644 "State.bs"
"/home/www/perl5/perlbrew/perls/perl-5.22.0/bin/perl" "/home/www/perl5/perlbrew/perls/perl-5.22.0/lib/5.22.0/ExtUtils/xsubpp"  -typemap "/var/www/perl5/perlb
rew/perls/perl-5.22.0/lib/5.22.0/ExtUtils/typemap" -typemap "typemap"  State.xs > State.xsc && mv State.xsc State.c
Warning: Aliases 'is_zombie' and 'is_destroyed' have identical values in State.xs, line 3800
cc -c   -fwrapv -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2 -O2   -DVERS
ION=\"6.49\" -DXS_VERSION=\"6.49\" -fPIC "-I/var/www/perl5/perlbrew/perls/perl-5.22.0/lib/5.22.0/x86_64-linux/CORE"  -DCORO_ASM -DCORO_STACKSIZE=16384 -DCORO
_GUARDPAGES=4 -DCORO_JIT=1 State.c
State.xs: In function ‘coro_derive_padlist’:
State.xs:575:29: error: lvalue required as left operand of assignment
State.xs: In function ‘boot_Coro__State’:
State.xs:3604:9: error: assignment of member ‘svt_get’ in read-only object
State.xs:3605:9: error: assignment of member ‘svt_set’ in read-only object
State.xs:3606:9: error: assignment of member ‘svt_clear’ in read-only object
make[1]: *** [State.o] Error 1

It works with Perl 5.20.

Some background: https://gist.github.com/ribasushi/3a4994b4a9e7cbd7e34cc442bffa63d3

[ribasushi]

@basic6 FYI someone got sufficiently annoyed to expand on that gist and publish it.

Cheers