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Re: Bug#879662: apt: debian-installer FTBFS: E: Method copy has died unexpectedly!

Control: notfound -1 1.4.8
Control: found -1 1.6~alpha1


Julian Andres Klode <jak@debian.org> (2017-10-24):
> On Tue, Oct 24, 2017 at 07:48:52AM +0200, Cyril Brulebois wrote:
> > Package: apt
> > Version: 1.4.8
> I assume you mean 1.6~alpha1? Because that's what the error
> seems to indicate.

Certainly. Sorry, I filed this from my laptop, in a hurry, and forgot to
edit the Version field.

> It says SIGSYS, which means a system call trapped by seccomp. Can you get a coredump
> and run gdb on it and get me a backtrace :) Or guess from the lists:
> https://people.debian.org/~jak/syscalls-allowed.txt
> https://people.debian.org/~jak/syscalls-trapped.txt (all syscalls I found - first list)
> Or play with the settings in the NEWS file,
> 	APT::Sandbox::Seccomp "false"; to disable it
> 	APT::Sandbox::Seccomp::Allow { "syscall1"; "syscall2"; }; to allow more syscalls by name
> I was wondering if we could install a SIGSYS signal handler to print
> which syscall was blocked, but did not find anything yet.

Thanks for the pointers. I've really be meaning to file this to make
sure it's documented/known. I won't have much time until tomorrow,
that's why I was suggesting just debcheckout (or apt-get source)
debian-installer and cd build && ./daily-build build-only in the

See you.


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