today plasma freezes completely after startup. so i killed it and tried it with
strace plasmashell

after some times the following lines are spammed over and over (at the same time the plasmashell dont do anything anymore)

lstat("/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4", 0x7fff4df3a1e0) = -1 ENOENT (No such file or directory)
sendmsg(7, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\0\1\236\0\0\0\214\253\0\0\261\0\0\0\1\1o\0\"\0\0\0/Activit"..., 200}, {"\10\0\0\0:current\0\0\0\0\4\0\0\0:any\0\0\0\0}\0\0\0"..., 158}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 358
poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name(0)=NULL, msg_iov(1)=[{"l\4\1\1\236\0\0\0M<\6\0\246\0\0\0\1\1o\0\"\0\0\0/Activit"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 398
recvmsg(7, 0x7fff4df399d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
fcntl(26, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=124, len=1}) = 0
fcntl(26, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=124, len=1}) = 0
lstat("/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4", 0x7fff4df3a1e0) = -1 ENOENT (No such file or directory)
sendmsg(7, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\0\1\236\0\0\0\215\253\0\0\261\0\0\0\1\1o\0\"\0\0\0/Activit"..., 200}, {"\10\0\0\0:current\0\0\0\0\4\0\0\0:any\0\0\0\0}\0\0\0"..., 158}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 358
poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name(0)=NULL, msg_iov(1)=[{"l\4\1\1\236\0\0\0O<\6\0\246\0\0\0\1\1o\0\"\0\0\0/Activit"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 398
recvmsg(7, 0x7fff4df399d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
fcntl(26, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=124, len=1}) = 0
fcntl(26, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=124, len=1}) = 0
lstat("/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4", 0x7fff4df3a1e0) = -1 ENOENT (No such file or directory)
sendmsg(7, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\0\1\236\0\0\0\216\253\0\0\261\0\0\0\1\1o\0\"\0\0\0/Activit"..., 200}, {"\10\0\0\0:current\0\0\0\0\4\0\0\0:any\0\0\0\0}\0\0\0"..., 158}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 358
poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name(0)=NULL, msg_iov(1)=[{"l\4\1\1\236\0\0\0Q<\6\0\246\0\0\0\1\1o\0\"\0\0\0/Activit"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 398
recvmsg(7, 0x7fff4df399d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
fcntl(26, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=124, len=1}) = 0
fcntl(26, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=124, len=1}) = 0
lstat("/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4", 0x7fff4df3a1e0) = -1 ENOENT (No such file or directory)
sendmsg(7, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\0\1\236\0\0\0\217\253\0\0\261\0\0\0\1\1o\0\"\0\0\0/Activit"..., 200}, {"\10\0\0\0:current\0\0\0\0\4\0\0\0:any\0\0\0\0}\0\0\0"..., 158}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 358
poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name(0)=NULL, msg_iov(1)=[{"l\4\1\1\236\0\0\0S<\6\0\246\0\0\0\1\1o\0\"\0\0\0/Activit"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 398
recvmsg(7, 0x7fff4df399d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
fcntl(26, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=124, len=1}) = 0
fcntl(26, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=124, len=1}) = 0
lstat("/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4", 0x7fff4df3a1e0) = -1 ENOENT (No such file or directory)
sendmsg(7, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\0\1\236\0\0\0\220\253\0\0\261\0\0\0\1\1o\0\"\0\0\0/Activit"..., 200}, {"\10\0\0\0:current\0\0\0\0\4\0\0\0:any\0\0\0\0}\0\0\0"..., 158}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 358
poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, revents=POLLIN}])
recvmsg(7, {msg_name(0)=NULL, msg_iov(1)=[{"l\4\1\1\236\0\0\0U<\6\0\246\0\0\0\1\1o\0\"\0\0\0/Activit"..., 2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 398
recvmsg(7, 0x7fff4df399d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable)
fcntl(26, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=124, len=1}) = 0
fcntl(26, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=124, len=1}) = 0


since i dont understand what that means, the important thing for me is
/home/fabi/Videos/[Hatsuyuki]_Astarotte_no_Omocha_[BD][720p][MP4]/[Hatsuyuki]_Astarotte_no_Omocha_EX_[BD][720p][CFC088CD].mp4
and 
(No such file or directory)

wich is an anime i donloaded yesterday and moved to another place with a new name.
first i tried just to create a text file in this directory with this name. but the issue is still the same and plasma wont start.
next i tried to move that one video file back to its old place with the old name.
now plasma starts again without any problem.

so i moved that file back again and tried to restart ... plasma freezes again.

so this file has to stay in this directory with its old name or i cant use my computer at all ...

Reproducible: Always



Expected Results:  
plasma should start without the need of a file anywhere in the filesystem

happens right now in manjaro with plasma 5.4.1, Qt 5.5 (well everything is up-2-date)
last time this has happened was with kubuntu and plasma 5.3.