Top rust issues

thread_local vs __thread: implementation and docs

A-thread-locals C-bug I-slow T-doc T-libs

Documentation for Implemented Traits Confusing for Beginners

A-traits C-enhancement T-doc T-rustdoc

Closure type error during const-eval (array len context)

A-const-eval A-mir C-bug I-ICE P-high T-compiler glacier

ICE 'no entry found for key' in Servo’s style crate

A-macros A-resolve C-bug I-ICE P-high T-compiler regression-from-stable-to-nightly

Accumulate all error codes / descriptions into one crate?

C-cleanup T-compiler

Proposal: add `reject` function to std::iter::Iterator

A-iterators C-feature-request T-libs

`unused_variables` and `unused_assignments` lints do not catch array usage

A-lint C-enhancement T-compiler T-lang

Cleanup: Move src/test/run-fail to src/test/ui

A-testsuite C-cleanup E-easy E-help-wanted T-compiler

Tracking issue for `Cow::is_borrowed` and `Cow::is_owned`

B-unstable C-tracking-issue Libs-Tracked T-libs

Inconsistent `const_err` on index access to array in polymorphic functions