2 calls to std._vec.len causes "mismatched type-params" error

[jyasskin]

For example:
use std;

fn foo(vec[str] args) {
  std._vec.len[str](args);
  std._vec.len[str](args);  // Error here.
}

fn main(vec[str] args) {}

Commenting out either call makes the other one succeed.

[graydon]

Yeah. This is a dupe of issue 93, we're working on it. Probably highest-priority bug at the moment. Thanks!

[froystig]

Issue #93 has been closed.

[pcwalton]

New typechecker fixes this.