OPAM's complete.sh script uses bash-specific syntax, but runs even when the shell is sh. This breaks e.g. Tramp, which runs more or less ssh remote-server "/bin/sh -l -c 'echo $PATH'; echo exit_status: $?" and gets an exit code of 2.

And indeed, once one removes the many layer of redirection to /dev/null, one gets this:

sh: 42: ./complete.sh: Syntax error: "(" unexpected (expecting "}")

Shouldn't OPAM's scripts either be written in SH syntax, or only be sourced when the shell is bash?

$ opam config report
# OPAM config report
# opam-version    1.2.2 
# self-upgrade    no
# os              linux
# external-solver no
# criteria        -removed,-notuptodate,-changed
# jobs            4
# repositories    1* (http), 1 (version-controlled)
# pinned          1 (path)
# current-switch  4.02.3
# last-update     2016-11-13 06:32