apt-get update: `osh -c -- echo hi`: Command '--' not found

[btertoolen]

Ran into this while working on regtest/debian.

apt or one of its hooks seems to invoke the system shell with -c -- before the actual commands that should be executed. But osh tries to execute -- as a command instead of treating it like an argument delimiter.

Here is the full command that is executed: [pid 21762] execve("/bin/sh", ["sh", "-c", "--", "dpkg-source --no-check -x hello_"...], 0x7ffe5af89d28 /* 19 vars */) = 0

Or a minimal reproducable example:

$ osh -c -- echo hi
Unexpected error in execvpe('--', ['--'], ...): [Errno 2] No such file or directory