All CI tests of librocthrust-tests have failed, with two different
failure modes.

On gfx803 and gfx906, the tests pass, but do so in under one minute,
with no test output. That cannot be right.

On all other architectures, about two minutes into the test, it seems an
infinite loop is encountered. The test eventually hits the timeout limit
and is then terminated by autopkgtest.

Filing this to track the issue.

[1] https://ci.rocm.debian.net/packages/r/rocthrust/