Top Nim issues

Nim lacks ref object constructor

gc:arc mode breaks tuple let

Destructors

Allow specifying/forcing the compilation backend in Nim for `nim doc`

Doc Generation

coroutine and channel support like go.

Waiting on author Stdlib

import os + use of paramCount and paramStr in config.nims causes "ambiguous call' error

[regression] Importing more than one module with same name from different packages produce bad codegen

Showstopper

Confusing error message for case expression with missing or void-typed `else` clause

Error messages

[Generics] Can't infer generic params via a constructor

Feature Generics Type inference

Nimpretty issue in lists over 80 chars.

nimpretty

Case does not check all cases.

Semcheck