snoopx luca # emerge -q --update --backtrack=1000 --deep @world
laymansync module's module_spec is old, missing attribute: 'sourcefile'.  Backward compatibility may be removed in the future.
File: /usr/lib64/python2.7/site-packages/portage/sync/modules/laymansync/__init__.pyc

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[ebuild     UD] dev-libs/icu-57.1 [58.1-r1]
[ebuild     U ] media-libs/gst-plugins-bad-0.10.23-r4 [0.10.23-r3]
[ebuild     UD] sys-libs/ncurses-5.9-r5 [6.0-r1]
[ebuild     UD] virtual/mysql-5.6-r7 [5.6-r8]

!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

dev-libs/icu:0

  (dev-libs/icu-58.1-r1:0/58.1::gentoo, installed) pulled in by
    dev-libs/icu:0/58.1 required by (app-office/libreoffice-bin-5.2.3.3:0/0::gentoo, installed)
                ^^^^^^^
    dev-libs/icu:0/58.1= required by (app-office/libreoffice-bin-5.2.3.3:0/0::gentoo, installed)
                ^^^^^^^^
    (and 2 more with the same problems)

  (dev-libs/icu-57.1:0/57::gentoo, ebuild scheduled for merge) pulled in by
    dev-libs/icu:0/57=[abi_x86_32(-),abi_x86_64(-)] required by (dev-qt/qtwebkit-4.8.6-r1:4/4::gentoo, installed)
                ^^^^^^
    (and 8 more with the same problem)

sys-libs/ncurses:0

  (sys-libs/ncurses-6.0-r1:0/6::gentoo, installed) pulled in by
    >=sys-libs/ncurses-5.9-r3:0/6=[abi_x86_32(-),abi_x86_64(-)] required by (sys-libs/gpm-1.20.7-r2:0/0::gentoo, installed)
                             ^^^^^
    (and 36 more with the same problem)

  (sys-libs/ncurses-5.9-r5:0/5::gentoo, ebuild scheduled for merge) pulled in by
    sys-libs/ncurses:0/5= required by (dev-lang/ruby-2.1.9:2.1/2.1::gentoo, installed)
                    ^^^^^
    (and 3 more with the same problem)

virtual/mysql:0

  (virtual/mysql-5.6-r8:0/18::gentoo, installed) pulled in by
    =virtual/mysql-5.6-r8 required by (kde-apps/akonadi-1.13.1_pre20160203-r1:4/4::gentoo, installed)
    ^              ^^^^^^
    (and 1 more with the same problem)

  (virtual/mysql-5.6-r7:0/18::gentoo, ebuild scheduled for merge) pulled in by
    >=virtual/mysql-5.6-r2:0/18=[abi_x86_32(-),abi_x86_64(-)] required by (dev-qt/qtsql-4.8.6-r1:4/4::gentoo, installed)

    >=virtual/mysql-5.6-r2:=[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (dev-qt/qtsql-4.8.6-r1:4/4::gentoo, installed)


NOTE: Use the '--verbose-conflicts' option to display parents omitted above