kwin crashes at launch asking for libwayland-egl.so.1 under X11

[Ivan Vučica]

When KDE session tries to launch kwin under X11, it crashes. Manually launching it from terminal gives the following error:
  kwin: error while loading shared libraries: libwayland-egl.so.1: cannot open shared object file: No such file or directory

Same for kwinactive:
  kwinactive: error while loading shared libraries: libwayland-egl.so.1: cannot open shared object file: No such file or directory

The relevant file in Debian comes from libegl1-mesa-drivers. (I looked up in Debian as Ubuntu's http://packages.ubuntu.com/file:libwayland-egl.so.1 is broken.)

'locate libwayland-egl.so.1' says the file lives in /usr/lib/x86_64-linux-gnu/mesa-egl. Adding this path to dynamic loader's path fixed the issue.
  LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/mesa-egl:$LD_LIBRARY_PATH kwin

The real question, I guess, is how come there is a dependency on a library intended for Wayland while running under X11... and, more so, how come the relevant path is not already part of the ld path.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: kde-window-manager 4:4.11.5-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
Uname: Linux 3.11.0-18-generic x86_64
NonfreeKernelModules: wl nvidia
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Sun Apr 6 00:54:05 2014
InstallationDate: Installed on 2014-02-18 (46 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: kde-workspace
UpgradeStatus: No upgrade log present (probably fresh install)