Ensure derive(PartialOrd) is no longer accidentally exponential
Previously, two comparison operations would be generated for each field, each of which could delegate to another derived PartialOrd. Now we use ordering and optional chaining to ensure each pair of fields is only compared once, addressing https://github.com/rust-lang/rust/issues/49650#issuecomment-379467572.
Closes#49505.
r? @Manishearth (sorry for changing it again so soon!)
Close#50755
typeck: Save the index of private fields
Save the index of all fields regardless of their visibility. Problems
could occur later when attempting to index fields in error recovery if
they are not inserted.
Fixes: #50493
update libcompiler_builtins
let's OpenBSD to use libcompiler_rt.a from system library. it unbreaks
the build from source on OpenBSD.
see https://github.com/rust-lang-nursery/compiler-builtins/pull/241 for related PR
note this PR brings some other changes (on `floatdisf`/`floatundisf`) with compiler-builtins update.
r? @alexcrichton
Fix self referential impl Trait substitutions
A high impact bug because a lot of common traits use a `Self` substitution by default. Should be backported to beta.
There was a check for this which wasn't catching all cases, it was made more robust.
Fixes#49376Fixes#50626
r? @petrochenkov
Save the index of all fields regardless of their visibility. Problems
could occur later when attempting to index fields in error recovery if
they are not inserted.
Rollup of 8 pull requests
Successful merges:
- #50624 (fs::write: Add example writing a &str)
- #50634 (Do not silently truncate offsets for `read_at`/`write_at` on emscripten)
- #50644 (AppVeyor: Read back trace from crash dump on failure.)
- #50661 (Ignore non .rs files for tidy libcoretest)
- #50663 (rustc: Allow an edition's feature on that edition)
- #50667 (rustc: Only suggest deleting `extern crate` if it works)
- #50670 (rustc: Include semicolon when removing `extern crate`)
- #50678 (Update openbsd targets)
Failed merges:
Update openbsd targets
- add a new target `aarch64-unknown-openbsd`
- update `i686-unknown-openbsd` to use lld with clang, in order to correctly link binaries with `i128`
rustc: Include semicolon when removing `extern crate`
Currently the lint for removing `extern crate` suggests removing `extern crate`
most of the time, but the rest of the time it suggest replacing it with `use
crate_name`. Unfortunately though when spliced into the original code you're
replacing
extern crate foo;
with
use foo
which is syntactically invalid! This commit ensure that the trailing semicolon
is included in rustc's suggestion to ensure that the code continues to compile
afterwards.
typeck: Fix ICE with struct update syntax
If check_expr_struct_fields fails, do not continue to record update.
If we continue to record update, the struct may cause us to ICE later
on indexing a field that may or may not exist.
Fixes: #50618
rustc: leave space for fields of uninhabited types to allow partial initialization.
Fixes#49298 by only collapsing uninhabited enum variants, and only if they only have ZST fields.
Fixes#50442 incidentally (@nox's optimization didn't take into account uninhabited variants).
Don't require clippy/miri for beta
r? @kennytm
cc @alexcrichton
I'm trying this out locally atm to see if it works as I think it should. Not sure how to test it for real except wait for the next beta.
fixes#50557
Better error reporting in Copy derive
In Copy derive, report all fulfillment erros when present and do not report errors for types tainted with `TyErr`. Also report all fields which are not Copy rather than just the first.
Also refactored `fn fully_normalize`, removing the not very useful helper function along with a FIXME to the closed issue #26721 that looks out of context now.
Fixes#50480
r? @estebank
A high impact bug because a lot of common traits use a `Self`
substitution by default. Should be backported to beta.
There was a check for this which wasn't catching all cases, it was made
more robust.
Fixes#49376Fixes#50626
r? @petrochenkov
Rollup of 13 pull requests
Successful merges:
- #50544 (Cleanup some dependencies)
- #50545 (Made some functions in time module const)
- #50550 (use fmt::Result where applicable)
- #50558 (Remove all reference to DepGraph::work_products)
- #50602 (Update canonicalize docs)
- #50607 (Allocate Symbol strings from an arena)
- #50613 (Migrate the toolstate update bot to rust-highfive)
- #50624 (fs::write: Add example writing a &str)
- #50634 (Do not silently truncate offsets for `read_at`/`write_at` on emscripten)
- #50644 (AppVeyor: Read back trace from crash dump on failure.)
- #50661 (Ignore non .rs files for tidy libcoretest)
- #50663 (rustc: Allow an edition's feature on that edition)
- #50667 (rustc: Only suggest deleting `extern crate` if it works)
Failed merges:
In Copy derive, report all fulfillment erros when present and do not
report errors for types tainted with `TyErr`. Also report all fields
which are not Copy rather than just the first.
Also refactored `fn fully_normalize`, removing the not very useful
helper function along with a FIXME to the closed issue #26721 that's
looks out of context now.
