infloop in `make check' on FreeBSD 5.0: due to /bin/sh?

[Jim Meyering]

FYI: I've just added this warning to coreutils' README file:
  ***********************
  FreeBSD 5.0 `make test' infinite loop with /bin/sh
  -----------------------

  When building and running `make test' on a FreeBSD 5.0 system,
  expect the tests/install/trap test to get stuck in an infinite
  loop.  That appears to be due to a bug in /bin/sh.
  When you change the first line of the tests/install/trap script
  to be e.g., #!/usr/local/bin/bash, the test completes normally.