Null entry in the PATH

[F-Loyer]

The opam file contains:

setenv: [
  [PATH += "%{_:runtime-x86_64}%"]
  [PATH += "%{_:runtime-i686}%"]
]

On my system the i686 tools set is absent, then these lines are transcribed by opam in its variable.sh as:

# Updated by package mingw-w64-shims
PATH='C:\Cygwin\usr\x86_64-w64-mingw32\sys-root\mingw\bin':"$PATH"; export PATH;
# Updated by package mingw-w64-shims
PATH='':"$PATH"; export PATH;

Then a null entry is inserted in the PATH. This can break some package (ocamlfind has an INSTALL file which is used instead of /usr/bin/install).

I am using opam 2.2.1.

[dra27]

That's very strange - ocaml/opam#5350 should be making that impossible!

[F-Loyer]

src/format/opamLineLexer.mll has changed since this PR.

the escape_spaces function and its substitution of "" to "@" have disappeared.

See https://github.com/ocaml/opam/blob/2.2.1/src/format/opamLineLexer.mll

This may explain it.

[tahina-pro]

I encounter this error when instructing opam init to modify the configuration files, but when I do not, and when I run eval $(opam env) manually, I don't have this error and things work well for me.