Re-land PR #72388: Recursively expand TokenKind::Interpolated in probably_equal_for_proc_macro
#73084
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
r? @eddyb (rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
|
Let's a try build for a Crater run, so that we can verify that no new crates are broken by this change: @bors try |
|
⌛ Trying commit e2242b8217ed26f58df0d9adf30de04c61d1a2f4 with merge 9be3f2265fdeef8522c7f7b149329a178eac5317... |
This comment has been minimized.
This comment has been minimized.
|
@bors try |
|
⌛ Trying commit 6329f808c468086795b6d2cc14f439f172907393 with merge 879b8cb7dc2ad9102994457e73cf78d124926ea5... |
This comment has been minimized.
This comment has been minimized.
|
☀️ Try build successful - checks-azure |
|
@craterbot check |
|
👌 Experiment ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more |
craterbot
added
S-waiting-on-crater
|
🚧 Experiment ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more |
|
🎉 Experiment
|
craterbot
added
S-waiting-on-review
|
Marking as waiting on author to triage the regressions. |
petrochenkov
added
S-waiting-on-author
|
A large chunk of the regressions seems to be from crates still using an outdated Unfortunately, many of the regressions are legitimate. It looks like the |
Aaron1011
added a commit
to Aaron1011/Pear
that referenced
this pull request
Jun 11, 2020
The method `Span.join` will return `None` if the start and end `Span`s are from different files. This is currently difficult to observe in practice due to rust-lang/rust#43081, which causes span information (including file information) to be lost in many cases. However, PR rust-lang/rust#73084 will cause `Spans` to be properly preserved in many more cases. This will cause `rocket` to to stop compiling, as this code will end up getting hit with spans from different files (one from rocket, and one from the `result` ident defined in the `pear_try!` macro. To reproduce the issue: 1. Checkout SergioBenitez/Rocket#63a4ae048540a6232c3c7c186e9d027081940382 2. Install https://github.com/kennytm/rustup-toolchain-install-master if you don't already have it 3. Run `rustup-toolchain-install-master 879b8cb7dc2ad9102994457e73cf78d124926ea5` (this corresponds to the latest commit from rust-lang/rust#73084) 4. From the `Rocket` checkout, run `cargo +879b8cb7dc2ad9102994457e73cf78d124926ea5 build` 5. Observe the panic from `Pear` I've based this PR on the commit for `Pear 0.1.2`, since the master branch has many breaking changes. I would recommend merging this change into a separate branch, and making a new `0.1.3` point release.
Aaron1011
added a commit
to Aaron1011/structopt
that referenced
this pull request
Jun 12, 2020
In `struct-opt-derive`, a function is generated with a parameter named `matches`. Since `quote!` is used to generate the function, the `matches` token will be resolved using `Span::call_site`. However, the literal identifier `matches` is also used inside several `quote_spanned!` expressions. Such a `matches` identifier will be resolved using the `Span` passed to `quote_spanned!`, which may not be the same as `Span::call_site`. Currently, this is difficult to observe in practice, due to rust-lang/rust#43081 . However, once PR rust-lang/rust#73084 is merged, proc macros will see properly spanned tokens in more cases, which will cause these incorrect uses of `quote_spanned!` to break. This PR uses `quote! { matches }` to generate a correctly spanned `matches` token, which is then include in the `quote_spanned!` expressions using `#matches`.
goldoneen
added a commit
to goldoneen/rust-front
that referenced
this pull request
May 7, 2022
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-aura
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-atomic-swap
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-authorship
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-assets
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-babe
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-authority-discovery
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-benchmarking
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-balances
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-collective
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-democracy
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-elections-phragmen
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-contracts
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-executive
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-indices
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-grandpa
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-membership
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-im-online
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-identity
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-multisig
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-nicks
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-offences
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-proxy
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-recovery
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-scored-pool
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-society
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-session
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
taqtiqa-mark
pushed a commit
to subversive-upstream/polkadot-sdk-substrate-frame-staking
that referenced
this pull request
Sep 14, 2023
This updates parity-scale-codec{-derive} to prepare for a rustc release
that would otherwise break the derive implementation:
rust-lang/rust#73084
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
PR #72388 allowed us to preserve the original
TokenStreamin more cases during proc-macro expansion, but had to be reverted due to a large number of regressions (See #72545 and #72622). These regressions fell into two categoriesGroups withDelimiter::None, which are inserted duringmacro_rules!expansion (but are lost during stringification and re-parsing). A large number of these regressions were due tosynandproc-macro-hack, but several crates needed changes to their own proc-macro code.quote_spanned!). However, two crates had intentionally written unhygenicmacro_rules!macros, which were able to access identifiers that were not passed as arguments (see Crater run for PR #72388 - Recursively expandTokenKind::Interpolatedinprobably_equal_for_proc_macro#72622 (comment)).All but one of the Crater regressions have now been fixed upstream (see https://hackmd.io/ItrXWRaSSquVwoJATPx3PQ?both). The remaining crate (which has a PR pending at sammhicks/face-generator#1) is not on
crates.io, and is a Yew application that seems unlikely to have any reverse dependencies.As @petrochenkov mentioned in #72545 (comment), not re-landing PR #72388 allows more crates to write unhygenic
macro_rules!macros, which will eventually stop compiling. Since there is only one Crater regression remaining, since additional crates could write unhygenicmacro_rules!macros in the time it takes that PR to be merged.