Environment: Lispworks 8.0.1 64bit Windows
It seems that there isn't a package called lexical in current version of Lispworks... but compiler::environment etc. can works seamlessly under at least Lispworks for Windows. I don't know which version the change happened.
I modified lexenv.lisp by applying all macOS specific code (they're using compiler package) to Windows, and replace all lexical::environment to compiler::environment. The modified version have passed compilation on my computer, but I cannot pass the test suite, due to the same issue with #2 .
Is it possible to figure out when the undocumented API changed? Or how can we just fix it...