Well... Actually,

What I did is:

flasher -f -F main.bin --erase-user-data=secure -R

Isn't that enough to also repair the partitions?

Yikes you didn't do it right no wonder... What you have done is just do a rootfs flash not emmc flash... If you screwed up partitions you should have done:

In simple terms, rootfs only flashes your / partition while emmc fixes your partitions

Oke, I will flash it again using that command

Although, there is no emmc for N950 available does that really matter?

Why is there no emmc for N950? Extract the emmc from the pr1.2 beta one-click flasher and use it

Any idea if that emmc will work with leaked pr1.3?

It should work; I read it on a thread around here that you can extract and it'll work as expected

I also encountered a device with exactly the same symptoms.

I did the following:

1. dump the partition to a file:

2. copy the partition dump to a desktop Linux system
3. run fsck.ext4 on the partition dump

4. copy the fixed partition dump back to the device
5. write the partition dump back to the mmc

6. reboot
7. keep fingers crossed that this doesn't happen again

I first tried running fsck.ext4 on the device itself but it kept segfaulting. There could be something wrong with the memory chips on the device.

Unfortunately it seems that even though the partition now works again, too many files were corrupted on the partition. Most likely the tracker database was lost since all contacts, messages etc. were lost. However, at least after this /home is on its own partition as expected. Of course that would also be achievable by just making a new ext4 filesystem on the partition and copying the relevant files over from /home/user.