Top Nim issues

Pragmas async+discardable should be a Syntax Error

Async Error messages Macros RFC Stdlib

nimsuggest devours CPU usage

Performance Tools

parser should accept parenthesized (unambiguous) multiline expression

Feature Parser

stdlib needs ryu for compact and performant float to string

Feature Stdlib

JSON library - Unmarshalling json, which contains "_key" key

Stdlib

[proposal] run whitelist of popular nimble packages as a part of non-blocking CI suite, to catch regressions early

High Priority

Proposal: endinanness-aware I/O in stdlib streams

Stdlib

Threadpool deadlocks on common multithreading examples

Threads

passing empty set/seq to template loses type information and errors

Semcheck Templates

Compiler should forbid duplicate enum string values

Low Priority Semcheck