Subteam report: compiler 2015-10-16
Highlights
We decided to place one RFC into FCP:
- RFC 1298: Incremental compilation
I would also like to declare Ryan Prichard a Friend of the Tree. Over the last few months, Ryan has been comparing the Rust compiler's parsing behavior with that of the rust-grammar project, which aims to create a LALR(1) grammar for parsing Rust. Ryan has found a number of inconsistencies and bugs between the two. This kind of work is useful for two reasons: it finds bugs, obviously, which are often hard to uncover any other way. Second, it helps pave the way for a true Rust reference grammar outside of the compiler source itself. So Ryan Prichard, thanks!
Finally, and on a more grave note, let me add that there have been a number of regressions popping up on nightly builds this week, so we are aiming to have those squashed down soon.
Thanks!
--nmatsakis
Dashboard
RFC phase
- PR #1246: Compiler UX Guidelines RFC
- PR #1292: i10n
- PR #1298: Incremental compilation RFC
- PR #1317: Changes to the compiler to support IDEs
Implementation phase
- Issue #5016: implement "dynamic drop" semantics using flags on the stack rather than zeroing
- Issue #12634: Replace various intrinsic wrappers with intrinsic reexports
- Issue #15023: Better temporary lifetimes (tracking issue for RFC 31)
- Issue #15287: Implement Pattern Guards with Bind-By-Move
- Issue #20561: Tracking issue for Consistent no-prelude attribute (RFC 501)
- Issue #27060: repr(packed) allows invalid unaligned loads
High priority issues
- Issue #26251: match expression falling through?
- Issue #26656: dropck can be bypassed via a trait object method
- Issue #27060: repr(packed) allows invalid unaligned loads
- Issue #28325: Rules governing references to private types in public APIs not enforced in impls
- Issue #28853: #28669 caused regression compiling pinyin crate on nightly
- Issue #28854: Nightly regression: lifetime error with autoderef
- Issue #28934: Nightly regression around HRTBs, likely connected to wf changes
- Issue #29048: Nightly regression: Incorrect "parameter type may not live long enough" warning
- Issue #29053: Unsoundness in borrowck around deref and mutable refs