Module.load produces duplicate bindings

[rexim]

Reproduction

It doesn't have any significant side effects (except probably slightly higher memory consumption), so it's easier to reproduce that in the code.

Copy the following code to REPL:

import me.rexim.morganey.module._
{
  new Module(CanonicalPath("std.prelude"))
    .load()
    .map { bindings =>
      bindings
        .map(_.variable.name)
        .groupBy(identity)
        .mapValues(_.length)
    }
}

Expected

All binding counts are 1

Observed

Some bindings are repeated up to 6 times