lua version mismatch in precompiled chunk

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[08ce3860] lua demux meta warning: Error loading script /usr/lib/vlc/lua/meta/reader/filename.luac: /usr/lib/vlc/lua/meta/reader/filename.luac: version mismatch in precompiled chunk [08cd1508] [cli] lua interface error: Error loading script /usr/lib/vlc/lua/intf/cli.luac: /usr/lib/vlc/lua/intf/cli.luac: version mismatch in precompiled chunk [08cec690] [http] lua interface error: Error loading script /usr/lib/vlc/lua/intf/http.luac: /usr/lib/vlc/lua/intf/http.luac: version mismatch in precompiled chunk [b224cd70] lua generic warning: Error loading script /usr/lib/vlc/lua/extensions/VLSub.luac: /usr/lib/vlc/lua/extensions/VLSub.luac: version mismatch in precompiled chunk [b122ad88] lua probe error: Error loading script /usr/lib/vlc/lua/sd/fmc.luac: /usr/lib/vlc/lua/sd/fmc.luac: version mismatch in precompiled chunk [b122ad88] lua probe error: Error loading script /usr/lib/vlc/lua/sd/icast.luac: /usr/lib/vlc/lua/sd/icast.luac: version mismatch in precompiled chunk [b122ad88] lua probe error: Error loading script /usr/lib/vlc/lua/sd/icecast.luac: /usr/lib/vlc/lua/sd/icecast.luac: version mismatch in precompiled chunk [b122ad88] lua probe error: Error loading script /usr/lib/vlc/lua/sd/jamendo.luac: /usr/lib/vlc/lua/sd/jamendo.luac: version mismatch in precompiled chunk [b122ad88] lua probe error: Error loading script /usr/lib/vlc/lua/sd/metachannels.luac: /usr/lib/vlc/lua/sd/metachannels.luac: version mismatch in precompiled chunk

(shortened, full log attached)

VLC Version: git master from yesterday evening, 2.2.0, 2.1.5 all show the same result. Linux version: Ubuntu trusty, kernel: 3.13.0-46-lowlatency #76 (closed)-Ubuntu SMP PREEMPT

system luac version: luac -v Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio