Top rust issues

`is_x86_feature_detected!("avx512f")` fails to build on beta and nightly

I-nominated P-high T-lang T-libs disposition-merge finished-final-comment-period regression-from-stable-to-nightly

Tracking issue for RFC 2361, "Simpler alternative dbg!() macro"

B-RFC-approved B-RFC-implemented B-unstable C-tracking-issue T-libs disposition-merge finished-final-comment-period

Tracking issue for RFC 2361, "Simpler alternative dbg!() macro"

B-RFC-approved B-RFC-implemented B-unstable C-tracking-issue T-libs disposition-merge finished-final-comment-period

html5ever in the rustc-perf repository is memory-intensive

A-NLL NLL-performant T-compiler

Tracking issue for the GlobalAlloc trait and related APIs

A-allocators B-unstable C-tracking-issue T-libs disposition-merge final-comment-period finished-final-comment-period

Tracking issue for {HashMap, BTreeMap}::get_key_value stabilization

C-tracking-issue T-libs disposition-merge finished-final-comment-period

Rust source make install fails due to missing vendor folder

A-rustbuild C-bug E-medium P-medium T-doc

Add support for splitting linker invocation to a second execution of `rustc`

A-linkage C-feature-request I-compiletime T-compiler

Tracking issue for RFC 2565, "Attributes in formal function parameter position"

B-RFC-approved B-RFC-implemented B-unstable C-tracking-issue F-param_attrs T-lang

`extern type` cannot support `size_of_val` and `align_of_val`

C-enhancement T-lang disposition-merge finished-final-comment-period