Top rust issues

const generics return type with const expression mismatched types

A-const-generics A-diagnostics C-bug D-confusing D-terse F-const_generics T-compiler requires-nightly

Support polymorphic InstanceDef's by avoiding double substitution.

A-codegen A-mir A-polymorphization T-compiler

libunwind contained in rust-src won't build for some targets

A-linkage C-bug O-musl

Use #[rustc_layout] instead of print-type-sizes

A-testsuite C-cleanup C-enhancement T-compiler

Improve diagnostics when a type does not impl a trait despite #[derive]'ing it

A-diagnostics C-enhancement D-newcomer-roadblock D-terse T-compiler

`PhantomData<fn()>` is unstable in `const fn`

A-const-fn C-feature-request T-lang

#[allow_internal_unstable] does not allow unstable library features when applied on functions

A-attributes A-const-fn A-stability C-bug T-compiler

#![inline(never)] vs #[inline(never)]

A-attributes C-bug

Compiler failed to spawn thread, "Resource temporarily unavailable" on hello-world; Ubuntu VM.

C-bug I-ICE O-linux T-compiler

Cannot compiling from source