Templates allowed to use ambiguous identifier

[gradha]

The following set of files defines two modules with the same constant and a third one trying to echo it:

# a.nim
const version_str* = "mod a"
# b.nim
const version_str* = "mod b"
# base.nim
import a, b

echo version_str

Compilation of the base.nim file fails correctly with:

base.nim(4, 5) Error: ambiguous identifier: 'version_str' -- use a qualifier

Wrapping the ambiguous identifier in a template avoids the error:

# base.nim
import a, b

template wrap_me(stuff): stmt =
  echo "Using " & version_str

wrap_me("hey")

This executes using the symbol defined in a.nim:

$ nimrod c -r base
Using mod a