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Auto merge of #124849 - matthiaskrgr:rollup-68humsk, r=matthiaskrgr

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Rollup of 5 pull requests

Successful merges:

 - #124738 (rustdoc: dedup search form HTML)
 - #124827 (generalize hr alias: avoid unconstrainable infer vars)
 - #124832 (narrow down visibilities in `rustc_parse::lexer`)
 - #124842 (replace another Option<Span> by DUMMY_SP)
 - #124846 (Don't ICE when we cannot eval a const to a valtree in the new solver)

r? `@ghost`
`@rustbot` modify labels: rollup
This commit is contained in:
bors 2024-05-07 17:44:06 +00:00
commit b923ea4924
20 changed files with 254 additions and 73 deletions
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12
compiler/rustc_const_eval/src/const_eval/error.rs
View File

@ -7,7 +7,7 @@
use rustc_middle::query::TyCtxtAt;
use rustc_middle::ty::TyCtxt;
use rustc_middle::ty::{layout::LayoutError, ConstInt};
use rustc_span::{Span, Symbol, DUMMY_SP};
use rustc_span::{Span, Symbol};
use super::CompileTimeInterpreter;
use crate::errors::{self, FrameNote, ReportErrorExt};
@ -121,7 +121,7 @@ pub fn get_span_and_frames<'tcx, 'mir>(
pub(super) fn report<'tcx, C, F, E>(
tcx: TyCtxt<'tcx>,
error: InterpError<'tcx>,
span: Option<Span>,
span: Span,
get_span_and_frames: C,
mk: F,
) -> ErrorHandled
@ -135,16 +135,16 @@ pub(super) fn report<'tcx, C, F, E>(
// Don't emit a new diagnostic for these errors, they are already reported elsewhere or
// should remain silent.
err_inval!(Layout(LayoutError::Unknown(_))) | err_inval!(TooGeneric) => {
ErrorHandled::TooGeneric(span.unwrap_or(DUMMY_SP))
ErrorHandled::TooGeneric(span)
}
err_inval!(AlreadyReported(guar)) => ErrorHandled::Reported(guar, span.unwrap_or(DUMMY_SP)),
err_inval!(AlreadyReported(guar)) => ErrorHandled::Reported(guar, span),
err_inval!(Layout(LayoutError::ReferencesError(guar))) => {
ErrorHandled::Reported(guar.into(), span.unwrap_or(DUMMY_SP))
ErrorHandled::Reported(guar.into(), span)
}
// Report remaining errors.
_ => {
let (our_span, frames) = get_span_and_frames();
let span = span.unwrap_or(our_span);
let span = span.substitute_dummy(our_span);
let err = mk(span, frames);
let mut err = tcx.dcx().create_err(err);

8
compiler/rustc_const_eval/src/const_eval/eval_queries.rs
View File

@ -12,7 +12,7 @@
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_session::lint;
use rustc_span::def_id::LocalDefId;
use rustc_span::Span;
use rustc_span::{Span, DUMMY_SP};
use rustc_target::abi::{self, Abi};
use super::{CanAccessMutGlobal, CompileTimeEvalContext, CompileTimeInterpreter};
@ -298,7 +298,7 @@ pub fn eval_to_const_value_raw_provider<'tcx>(
super::report(
tcx,
error.into_kind(),
Some(span),
span,
|| (span, vec![]),
|span, _| errors::NullaryIntrinsicError { span },
)
@ -406,7 +406,7 @@ fn eval_in_interpreter<'tcx, R: InterpretationResult<'tcx>>(
super::report(
*ecx.tcx,
error,
None,
DUMMY_SP,
|| super::get_span_and_frames(ecx.tcx, ecx.stack()),
|span, frames| ConstEvalError { span, error_kind: kind, instance, frame_notes: frames },
)
@ -461,7 +461,7 @@ fn report_validation_error<'mir, 'tcx>(
crate::const_eval::report(
*ecx.tcx,
error,
None,
DUMMY_SP,
|| crate::const_eval::get_span_and_frames(ecx.tcx, ecx.stack()),
move |span, frames| errors::ValidationFailure { span, ub_note, frames, raw_bytes },
)

32
compiler/rustc_hir_typeck/src/closure.rs
View File

@ -31,6 +31,7 @@ struct ExpectedSig<'tcx> {
sig: ty::PolyFnSig<'tcx>,
}
#[derive(Debug)]
struct ClosureSignatures<'tcx> {
/// The signature users of the closure see.
bound_sig: ty::PolyFnSig<'tcx>,
@ -713,25 +714,16 @@ fn merge_supplied_sig_with_expectation(
// [c2]: https://github.com/rust-lang/rust/pull/45072#issuecomment-341096796
self.commit_if_ok(|_| {
let mut all_obligations = vec![];
let inputs: Vec<_> = iter::zip(
decl.inputs,
supplied_sig.inputs().skip_binder(), // binder moved to (*) below
)
.map(|(hir_ty, &supplied_ty)| {
// Instantiate (this part of..) S to S', i.e., with fresh variables.
self.instantiate_binder_with_fresh_vars(
hir_ty.span,
BoundRegionConversionTime::FnCall,
// (*) binder moved to here
supplied_sig.inputs().rebind(supplied_ty),
)
})
.collect();
let supplied_sig = self.instantiate_binder_with_fresh_vars(
self.tcx.def_span(expr_def_id),
BoundRegionConversionTime::FnCall,
supplied_sig,
);
// The liberated version of this signature should be a subtype
// of the liberated form of the expectation.
for ((hir_ty, &supplied_ty), expected_ty) in iter::zip(
iter::zip(decl.inputs, &inputs),
iter::zip(decl.inputs, supplied_sig.inputs()),
expected_sigs.liberated_sig.inputs(), // `liberated_sig` is E'.
) {
// Check that E' = S'.
@ -744,11 +736,7 @@ fn merge_supplied_sig_with_expectation(
all_obligations.extend(obligations);
}
let supplied_output_ty = self.instantiate_binder_with_fresh_vars(
decl.output.span(),
BoundRegionConversionTime::FnCall,
supplied_sig.output(),
);
let supplied_output_ty = supplied_sig.output();
let cause = &self.misc(decl.output.span());
let InferOk { value: (), obligations } = self.at(cause, self.param_env).eq(
DefineOpaqueTypes::Yes,
@ -757,7 +745,8 @@ fn merge_supplied_sig_with_expectation(
)?;
all_obligations.extend(obligations);
let inputs = inputs.into_iter().map(|ty| self.resolve_vars_if_possible(ty));
let inputs =
supplied_sig.inputs().into_iter().map(|&ty| self.resolve_vars_if_possible(ty));
expected_sigs.liberated_sig = self.tcx.mk_fn_sig(
inputs,
@ -1013,6 +1002,7 @@ fn error_sig_of_closure(
result
}
#[instrument(level = "debug", skip(self), ret)]
fn closure_sigs(
&self,
expr_def_id: LocalDefId,

44
compiler/rustc_infer/src/infer/relate/generalize.rs
View File

@ -350,7 +350,13 @@ fn generalize_alias_ty(
&mut self,
alias: ty::AliasTy<'tcx>,
) -> Result<Ty<'tcx>, TypeError<'tcx>> {
if self.infcx.next_trait_solver() && !alias.has_escaping_bound_vars() {
// We do not eagerly replace aliases with inference variables if they have
// escaping bound vars, see the method comment for details. However, when we
// are inside of an alias with escaping bound vars replacing nested aliases
// with inference variables can cause incorrect ambiguity.
//
// cc trait-system-refactor-initiative#110
if self.infcx.next_trait_solver() && !alias.has_escaping_bound_vars() && !self.in_alias {
return Ok(self.infcx.next_ty_var_in_universe(
TypeVariableOrigin { param_def_id: None, span: self.span },
self.for_universe,
@ -492,9 +498,30 @@ fn tys(&mut self, t: Ty<'tcx>, t2: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>> {
let origin = inner.type_variables().var_origin(vid);
let new_var_id =
inner.type_variables().new_var(self.for_universe, origin);
let u = Ty::new_var(self.tcx(), new_var_id);
debug!("replacing original vid={:?} with new={:?}", vid, u);
Ok(u)
// If we're in the new solver and create a new inference
// variable inside of an alias we eagerly constrain that
// inference variable to prevent unexpected ambiguity errors.
//
// This is incomplete as it pulls down the universe of the
// original inference variable, even though the alias could
// normalize to a type which does not refer to that type at
// all. I don't expect this to cause unexpected errors in
// practice.
//
// We only need to do so for type and const variables, as
// region variables do not impact normalization, and will get
// correctly constrained by `AliasRelate` later on.
//
// cc trait-system-refactor-initiative#108
if self.infcx.next_trait_solver()
&& !self.infcx.intercrate
&& self.in_alias
{
inner.type_variables().equate(vid, new_var_id);
}
debug!("replacing original vid={:?} with new={:?}", vid, new_var_id);
Ok(Ty::new_var(self.tcx(), new_var_id))
}
}
}
@ -614,6 +641,15 @@ fn consts(
universe: self.for_universe,
})
.vid;
// See the comment for type inference variables
// for more details.
if self.infcx.next_trait_solver()
&& !self.infcx.intercrate
&& self.in_alias
{
variable_table.union(vid, new_var_id);
}
Ok(ty::Const::new_var(self.tcx(), new_var_id, c.ty()))
}
}

8
compiler/rustc_parse/src/lexer/diagnostics.rs
View File

@ -5,7 +5,7 @@
use rustc_span::Span;
#[derive(Default)]
pub struct TokenTreeDiagInfo {
pub(super) struct TokenTreeDiagInfo {
/// Stack of open delimiters and their spans. Used for error message.
pub open_braces: Vec<(Delimiter, Span)>,
pub unmatched_delims: Vec<UnmatchedDelim>,
@ -21,7 +21,7 @@ pub struct TokenTreeDiagInfo {
pub matching_block_spans: Vec<(Span, Span)>,
}
pub fn same_indentation_level(sm: &SourceMap, open_sp: Span, close_sp: Span) -> bool {
pub(super) fn same_indentation_level(sm: &SourceMap, open_sp: Span, close_sp: Span) -> bool {
match (sm.span_to_margin(open_sp), sm.span_to_margin(close_sp)) {
(Some(open_padding), Some(close_padding)) => open_padding == close_padding,
_ => false,
@ -30,7 +30,7 @@ pub fn same_indentation_level(sm: &SourceMap, open_sp: Span, close_sp: Span) ->
// When we get a `)` or `]` for `{`, we should emit help message here
// it's more friendly compared to report `unmatched error` in later phase
pub fn report_missing_open_delim(err: &mut Diag<'_>, unmatched_delims: &[UnmatchedDelim]) -> bool {
fn report_missing_open_delim(err: &mut Diag<'_>, unmatched_delims: &[UnmatchedDelim]) -> bool {
let mut reported_missing_open = false;
for unmatch_brace in unmatched_delims.iter() {
if let Some(delim) = unmatch_brace.found_delim
@ -51,7 +51,7 @@ pub fn report_missing_open_delim(err: &mut Diag<'_>, unmatched_delims: &[Unmatch
reported_missing_open
}
pub fn report_suspicious_mismatch_block(
pub(super) fn report_suspicious_mismatch_block(
err: &mut Diag<'_>,
diag_info: &TokenTreeDiagInfo,
sm: &SourceMap,

2
compiler/rustc_parse/src/lexer/mod.rs
View File

@ -112,7 +112,7 @@ struct StringReader<'psess, 'src> {
}
impl<'psess, 'src> StringReader<'psess, 'src> {
pub fn dcx(&self) -> &'psess DiagCtxt {
fn dcx(&self) -> &'psess DiagCtxt {
&self.psess.dcx
}

2
compiler/rustc_parse/src/lexer/unicode_chars.rs
View File

@ -9,7 +9,7 @@
use rustc_span::{symbol::kw, BytePos, Pos, Span};
#[rustfmt::skip] // for line breaks
pub(crate) const UNICODE_ARRAY: &[(char, &str, &str)] = &[
pub(super) const UNICODE_ARRAY: &[(char, &str, &str)] = &[
('
', "Line Separator", " "),
('
', "Paragraph Separator", " "),
(' ', "Ogham Space mark", " "),

6
compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
View File

@ -1052,12 +1052,12 @@ pub(super) fn try_const_eval_resolve(
ty: Ty<'tcx>,
) -> Option<ty::Const<'tcx>> {
use rustc_middle::mir::interpret::ErrorHandled;
match self.infcx.try_const_eval_resolve(param_env, unevaluated, ty, DUMMY_SP) {
Ok(ct) => Some(ct),
match self.infcx.const_eval_resolve(param_env, unevaluated, DUMMY_SP) {
Ok(Some(val)) => Some(ty::Const::new_value(self.tcx(), val, ty)),
Ok(None) | Err(ErrorHandled::TooGeneric(_)) => None,
Err(ErrorHandled::Reported(e, _)) => {
Some(ty::Const::new_error(self.tcx(), e.into(), ty))
}
Err(ErrorHandled::TooGeneric(_)) => None,
}
}

5
compiler/rustc_trait_selection/src/solve/inspect/build.rs
View File

@ -376,7 +376,10 @@ pub fn canonical_goal_evaluation(&mut self, canonical_goal_evaluation: ProofTree
(
DebugSolver::GoalEvaluation(goal_evaluation),
DebugSolver::CanonicalGoalEvaluation(canonical_goal_evaluation),
) => goal_evaluation.evaluation = Some(canonical_goal_evaluation),
) => {
let prev = goal_evaluation.evaluation.replace(canonical_goal_evaluation);
assert_eq!(prev, None);
}
_ => unreachable!(),
}
}

43
src/librustdoc/html/static/js/storage.js
View File

@ -239,3 +239,46 @@ window.addEventListener("pageshow", ev => {
setTimeout(updateSidebarWidth, 0);
}
});
// Custom elements are used to insert some JS-dependent features into Rustdoc,
// because the [parser] runs the connected callback
// synchronously. It needs to be added synchronously so that nothing below it
// becomes visible until after it's done. Otherwise, you get layout jank.
//
// That's also why this is in storage.js and not main.js.
//
// [parser]: https://html.spec.whatwg.org/multipage/parsing.html
class RustdocSearchElement extends HTMLElement {
constructor() {
super();
}
connectedCallback() {
const rootPath = getVar("root-path");
const currentCrate = getVar("current-crate");
this.innerHTML = `<nav class="sub">
<form class="search-form">
<span></span> <!-- This empty span is a hacky fix for Safari - See #93184 -->
<div id="sidebar-button" tabindex="-1">
<a href="${rootPath}${currentCrate}/all.html" title="show sidebar"></a>
</div>
<input
class="search-input"
name="search"
aria-label="Run search in the documentation"
autocomplete="off"
spellcheck="false"
placeholder="Type ‘S’ or ‘/’ to search, ‘?’ for more options…"
type="search">
<div id="help-button" tabindex="-1">
<a href="${rootPath}help.html" title="help">?</a>
</div>
<div id="settings-menu" tabindex="-1">
<a href="${rootPath}settings.html" title="settings">
Settings
</a>
</div>
</form>
</nav>`;
}
}
window.customElements.define("rustdoc-search", RustdocSearchElement);

27
src/librustdoc/html/templates/page.html
View File

@ -117,30 +117,9 @@
<div class="sidebar-resizer"></div> {# #}
<main> {# #}
{% if page.css_class != "src" %}<div class="width-limiter">{% endif %}
<nav class="sub"> {# #}
<form class="search-form"> {# #}
<span></span> {# This empty span is a hacky fix for Safari - See #93184 #}
<div id="sidebar-button" tabindex="-1"> {# #}
<a href="{{page.root_path|safe}}{{layout.krate|safe}}/all.html" title="show sidebar"></a> {# #}
</div> {# #}
<input {#+ #}
class="search-input" {#+ #}
name="search" {#+ #}
aria-label="Run search in the documentation" {#+ #}
autocomplete="off" {#+ #}
spellcheck="false" {#+ #}
placeholder="Type ‘S’ or ‘/’ to search, ‘?’ for more options…" {#+ #}
type="search"> {# #}
<div id="help-button" tabindex="-1"> {# #}
<a href="{{page.root_path|safe}}help.html" title="help">?</a> {# #}
</div> {# #}
<div id="settings-menu" tabindex="-1"> {# #}
<a href="{{page.root_path|safe}}settings.html" title="settings"> {# #}
Settings {# #}
</a> {# #}
</div> {# #}
</form> {# #}
</nav> {# #}
{# defined in storage.js to avoid duplicating complex UI across every page #}
{# and because the search form only works if JS is enabled anyway #}
<rustdoc-search></rustdoc-search> {# #}
<section id="main-content" class="content">{{ content|safe }}</section> {# #}
{% if page.css_class != "src" %}</div>{% endif %}
</main> {# #}

2
src/tools/html-checker/main.rs
View File

@ -29,6 +29,8 @@ fn check_html_file(file: &Path) -> usize {
.arg("-quiet")
.arg("--mute-id") // this option is useful in case we want to mute more warnings
.arg("yes")
.arg("--new-blocklevel-tags")
.arg("rustdoc-search") // custom elements
.arg("--mute")
.arg(&to_mute_s)
.arg(file);

2
tests/rustdoc-gui/javascript-disabled.goml
View File

@ -4,7 +4,7 @@ javascript: false
go-to: "file://" + |DOC_PATH| + "/test_docs/struct.Foo.html"
show-text: true
assert-css: (".sub", {"display": "none"})
assert-false: ".sub"
// Even though JS is disabled, we should still have themes applied. Links are never black-colored
// if styles are applied so we check that they are not.

2
tests/rustdoc-gui/sidebar-source-code-display.goml
View File

@ -4,7 +4,7 @@ javascript: false
go-to: "file://" + |DOC_PATH| + "/src/test_docs/lib.rs.html"
// Since the javascript is disabled, there shouldn't be a toggle.
wait-for-css: (".sidebar", {"display": "none"})
assert-css: ("#sidebar-button", {"display": "none"})
assert-false: "#sidebar-button"
// Let's retry with javascript enabled.
javascript: true

3
tests/ui/traits/next-solver/canonical/const-region-infer-to-static-in-binder.rs
View File

@ -1,8 +1,9 @@
//@ compile-flags: -Znext-solver=coherence
//@ compile-flags: -Znext-solver
#[derive(Debug)]
struct X<const FN: fn() = { || {} }>;
//~^ ERROR using function pointers as const generic parameters is forbidden
//~| ERROR using function pointers as const generic parameters is forbidden
//~| ERROR type annotations needed
fn main() {}

9
tests/ui/traits/next-solver/canonical/const-region-infer-to-static-in-binder.stderr
View File

@ -1,3 +1,9 @@
error[E0282]: type annotations needed
--> $DIR/const-region-infer-to-static-in-binder.rs:4:10
|
LL | struct X<const FN: fn() = { || {} }>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer the value of the constant `{ || {} }`
error: using function pointers as const generic parameters is forbidden
--> $DIR/const-region-infer-to-static-in-binder.rs:4:20
|
@ -15,5 +21,6 @@ LL | struct X<const FN: fn() = { || {} }>;
= note: the only supported types are integers, `bool` and `char`
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 2 previous errors
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0282`.

36
tests/ui/traits/next-solver/generalize/hr-alias-non-hr-alias-self-ty-1.rs Normal file
View File

@ -0,0 +1,36 @@
//@ revisions: old next
//@[next] compile-flags: -Znext-solver
//@ ignore-compare-mode-next-solver (explicit revisions)
//@ check-pass
// Generalizing an alias referencing escaping bound variables
// is hard. We previously didn't replace this alias with inference
// variables but did replace nested alias which do not reference
// any bound variables. This caused us to stall with the following
// goal, which cannot make any progress:
//
// <<T as Id>::Refl as HigherRanked>::Output<'a>
// alias-relate
// <?unconstrained as HigherRanked>::Output<'a>
//
//
// cc trait-system-refactor-initiative#110
#![allow(unused)]
trait HigherRanked {
type Output<'a>;
}
trait Id {
type Refl: HigherRanked;
}
fn foo<T: Id>() -> for<'a> fn(<<T as Id>::Refl as HigherRanked>::Output<'a>) {
todo!()
}
fn bar<T: Id>() {
// we generalize here
let x = foo::<T>();
}
fn main() {}

32
tests/ui/traits/next-solver/generalize/hr-alias-non-hr-alias-self-ty-2.rs Normal file
View File

@ -0,0 +1,32 @@
//@ revisions: old next
//@[next] compile-flags: -Znext-solver
//@ ignore-compare-mode-next-solver (explicit revisions)
//@ check-pass
// A minimization of an ambiguity error in `icu_provider`.
//
// cc trait-system-refactor-initiative#110
trait Yokeable<'a> {
type Output;
}
trait Id {
type Refl;
}
fn into_deserialized<M: Id>() -> M
where
M::Refl: for<'a> Yokeable<'a>,
{
try_map_project::<M, _>(|_| todo!())
}
fn try_map_project<M: Id, F>(_f: F) -> M
where
M::Refl: for<'a> Yokeable<'a>,
F: for<'a> FnOnce(&'a ()) -> <<M as Id>::Refl as Yokeable<'a>>::Output,
{
todo!()
}
fn main() {}

51
tests/ui/traits/next-solver/generalize/hr-alias-universe-lowering-ambiguity.rs Normal file
View File

@ -0,0 +1,51 @@
//@ compile-flags: -Znext-solver
//@ check-pass
// A regression test for a fairly subtle issue with how we
// generalize aliases referencing higher-ranked regions
// which previously caused unexpected ambiguity errors.
//
// The explanations in the test may end up being out of date
// in the future as we may refine our approach to generalization
// going forward.
//
// cc trait-system-refactor-initiative#108
trait Trait<'a> {
type Assoc;
}
impl<'a> Trait<'a> for () {
type Assoc = ();
}
fn foo<T: for<'a> Trait<'a>>(x: T) -> for<'a> fn(<T as Trait<'a>>::Assoc) {
|_| ()
}
fn unconstrained<T>() -> T {
todo!()
}
fn main() {
// create `?x.0` in the root universe
let mut x = unconstrained();
// bump the current universe of the inference context
let bump: for<'a, 'b> fn(&'a (), &'b ()) = |_, _| ();
let _: for<'a> fn(&'a (), &'a ()) = bump;
// create `?y.1` in a higher universe
let mut y = Default::default();
// relate `?x.0` with `for<'a> fn(<?y.1 as Trait<'a>>::Assoc)`
// -> instantiate `?x.0` with `for<'a> fn(<?y_new.0 as Trait<'a>>::Assoc)`
x = foo(y);
// Constrain `?y.1` to `()`
let _: () = y;
// `AliasRelate(<?y_new.0 as Trait<'a>>::Assoc, <() as Trait<'a>>::Assoc)`
// remains ambiguous unless we somehow constrain `?y_new.0` during
// generalization to be equal to `?y.1`, which is exactly what we
// did to fix this issue.
}

1
tests/ui/traits/next-solver/generalize/occurs-check-nested-alias.rs
View File

@ -1,5 +1,6 @@
//@ revisions: old next
//@[next] compile-flags: -Znext-solver
//@ ignore-compare-mode-next-solver (explicit revisions)
//@ check-pass
// case 3 of https://github.com/rust-lang/trait-system-refactor-initiative/issues/8.