I have no idea what might cause that. The closest thing to a relevant google result I can find is http://forums.debian.net/viewtopic.php?f=10&t=112403 which seems to suggest installing some random package. I can’t see that would have any effect whatsoever on syncthing though.
I’m hitting this with Ubuntu 14.04.2 and kernel 3.13.0-74.118 and the current syncthing version (12.10) i386
gdb says
Program received signal SIGTRAP, Trace/breakpoint trap.
0x080d3817 in runtime.setldt ()
(gdb) bt
#0 0x080d3817 in runtime.setldt ()
#1 0x00000000 in ?? ()
Since you have the binaries in front of you, what’s the output of -version on 0.10.6 and 0.10.7? I’m thinking we may have changed the compiler between those versions?
In the meantime, I changed the server (the webhoster remains the same). After trying to start syncthing 0.12.10, the error “Trace/breakpoint trap” occures again.