MTP problems - segfault and coredump

[anon23612428]

Kernel 4.14, both Manjaro and custom -vd.
Manjaro LXDE testing
Thunar + PCManFM + mtpfs

I'm currently getting segfaults when trying to access my phone via mtp. It doesn't matter whether I choose Thunar, PCManFM or mtpfs.

Excerpts:

Stack trace of thread 1264:
                                             #0  0x00007fa648ecfb3a __GI___strlen_sse2 (libc.so.6)
                                             #1  0x00007fa648855cda n/a (libmtp.so.9)
                                             #2  0x00007fa6488666db n/a (libmtp.so.9)
                                             #3  0x00007fa64884ee61 LIBMTP_Get_Filemetadata (libmtp.so.>
                                             #4  0x00007fa64884f0e9 LIBMTP_Get_Files_And_Folders (libmt>
                                             #5  0x0000561867fe2f48 n/a (gvfsd-mtp)
                                             #6  0x00007fa648e24f6b g_vfs_job_run (libgvfsdaemon.so)
                                             #7  0x00007fa648aee4a6 n/a (libglib-2.0.so.0)
                                             #8  0x00007fa648af767b n/a (libglib-2.0.so.0)
                                             #9  0x00007fa648504a9d start_thread (libpthread.so.0)
                                             #10 0x00007fa648f31b23 __clone (libc.so.6)

Stack trace of thread 898:
                                            #0  0x00007f3f09c82b3a __GI___strlen_sse2 (libc.so.6)
                                            #1  0x00007f3f0a237cda n/a (libmtp.so.9)
                                            #2  0x00007f3f0a2486db n/a (libmtp.so.9)
                                            #3  0x00007f3f0a228409 n/a (libmtp.so.9)
                                            #4  0x00007f3f0a2285c9 n/a (libmtp.so.9)
                                            #5  0x00007f3f0a23085f LIBMTP_Open_Raw_Device (libmtp.so.9)
                                            #6  0x000055b60b98f541 n/a (mtpfs)
                                            #7  0x00007f3f09c0d223 __libc_start_main (libc.so.6)
                                            #8  0x000055b60b98f6ba n/a (mtpfs)

Does anyone have similar problems?
The problem only seems to have started today, as even yesterday I could still access the phone.

EDIT: access via adb works.

[anon23612428]

For some reason it seems that an OS has to be installed on the phone to use MTP, which is completely new to me.
It's normally enough that the underlying partition is formatted.

No idea why it produces a segfault without an installed OS...