Rollup merge of #118533 - chenyukang:yukang-fix-118455, r=petrochenkov

Suppress unhelpful diagnostics for unresolved top level attributes

Fixes #118455, unresolved top level attribute error didn't imported prelude and already have emitted an error, report builtin macro and attributes error by the way, so `check_invalid_crate_level_attr` in can ignore them.

Also fixes #89566, fixes #67107.

r? `@petrochenkov`

compiler/rustc_errors/src/lib.rs

@@ -514,6 +514,7 @@ pub enum StashKey {
     MaybeForgetReturn,
     /// Query cycle detected, stashing in favor of a better error.
     Cycle,
+    UndeterminedMacroResolution,
 }
 
 fn default_track_diagnostic(diag: Diagnostic, f: &mut dyn FnMut(Diagnostic)) {

compiler/rustc_passes/src/check_attr.rs

@@ -5,8 +5,10 @@
 //! item.
 
 use crate::{errors, fluent_generated as fluent};
-use rustc_ast::{ast, AttrStyle, Attribute, LitKind, MetaItemKind, MetaItemLit, NestedMetaItem};
+use rustc_ast::{ast, AttrKind, AttrStyle, Attribute, LitKind};
+use rustc_ast::{MetaItemKind, MetaItemLit, NestedMetaItem};
 use rustc_data_structures::fx::FxHashMap;
+use rustc_errors::StashKey;
 use rustc_errors::{Applicability, DiagCtxt, IntoDiagnosticArg, MultiSpan};
 use rustc_feature::{AttributeDuplicates, AttributeType, BuiltinAttribute, BUILTIN_ATTRIBUTE_MAP};
 use rustc_hir as hir;
@@ -2530,6 +2532,14 @@ fn check_invalid_crate_level_attr(tcx: TyCtxt<'_>, attrs: &[Attribute]) {
         if attr.style == AttrStyle::Inner {
             for attr_to_check in ATTRS_TO_CHECK {
                 if attr.has_name(*attr_to_check) {
+                    if let AttrKind::Normal(ref p) = attr.kind
+                        && let Some(diag) = tcx.dcx().steal_diagnostic(
+                            p.item.path.span,
+                            StashKey::UndeterminedMacroResolution,
+                        )
+                    {
+                        diag.cancel();
+                    }
                     let item = tcx
                         .hir()
                         .items()

compiler/rustc_resolve/src/macros.rs

@@ -1,10 +1,9 @@
 //! A bunch of methods and structures more or less related to resolving macros and
 //! interface provided by `Resolver` to macro expander.
 
-use crate::errors::{
-    self, AddAsNonDerive, CannotDetermineMacroResolution, CannotFindIdentInThisScope,
-    MacroExpectedFound, RemoveSurroundingDerive,
-};
+use crate::errors::CannotDetermineMacroResolution;
+use crate::errors::{self, AddAsNonDerive, CannotFindIdentInThisScope};
+use crate::errors::{MacroExpectedFound, RemoveSurroundingDerive};
 use crate::Namespace::*;
 use crate::{BuiltinMacroState, Determinacy, MacroData};
 use crate::{DeriveData, Finalize, ParentScope, ResolutionError, Resolver, ScopeSet};
@@ -15,7 +14,7 @@ use rustc_ast_pretty::pprust;
 use rustc_attr::StabilityLevel;
 use rustc_data_structures::intern::Interned;
 use rustc_data_structures::sync::Lrc;
-use rustc_errors::{codes::*, struct_span_code_err, Applicability};
+use rustc_errors::{codes::*, struct_span_code_err, Applicability, StashKey};
 use rustc_expand::base::{Annotatable, DeriveResolutions, Indeterminate, ResolverExpand};
 use rustc_expand::base::{SyntaxExtension, SyntaxExtensionKind};
 use rustc_expand::compile_declarative_macro;
@@ -25,9 +24,8 @@ use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
 use rustc_middle::middle::stability;
 use rustc_middle::ty::RegisteredTools;
 use rustc_middle::ty::{TyCtxt, Visibility};
-use rustc_session::lint::builtin::{
-    LEGACY_DERIVE_HELPERS, SOFT_UNSTABLE, UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES,
-};
+use rustc_session::lint::builtin::UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES;
+use rustc_session::lint::builtin::{LEGACY_DERIVE_HELPERS, SOFT_UNSTABLE};
 use rustc_session::lint::builtin::{UNUSED_MACROS, UNUSED_MACRO_RULES};
 use rustc_session::lint::BuiltinLintDiagnostics;
 use rustc_session::parse::feature_err;
@@ -703,21 +701,21 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
                     // situations should be reported as errors, so this is a bug.
                     this.dcx().span_delayed_bug(span, "inconsistent resolution for a macro");
                 }
-            } else {
+            } else if this.tcx.dcx().has_errors().is_none() && this.privacy_errors.is_empty() {
                 // It's possible that the macro was unresolved (indeterminate) and silently
                 // expanded into a dummy fragment for recovery during expansion.
                 // Now, post-expansion, the resolution may succeed, but we can't change the
                 // past and need to report an error.
                 // However, non-speculative `resolve_path` can successfully return private items
                 // even if speculative `resolve_path` returned nothing previously, so we skip this
-                // less informative error if the privacy error is reported elsewhere.
-                if this.privacy_errors.is_empty() {
-                    this.dcx().emit_err(CannotDetermineMacroResolution {
-                        span,
-                        kind: kind.descr(),
-                        path: Segment::names_to_string(path),
-                    });
-                }
+                // less informative error if no other error is reported elsewhere.
+
+                let err = this.dcx().create_err(CannotDetermineMacroResolution {
+                    span,
+                    kind: kind.descr(),
+                    path: Segment::names_to_string(path),
+                });
+                err.stash(span, StashKey::UndeterminedMacroResolution);
             }
         };
 

tests/ui/derives/issue-36617.rs

@@ -1,16 +1,16 @@
-#![derive(Copy)] //~ ERROR cannot determine resolution for the attribute macro `derive`
+#![derive(Copy)]
 //~^ ERROR `derive` attribute cannot be used at crate level
 
-#![test]//~ ERROR cannot determine resolution for the attribute macro `test`
+#![test]
 //~^ ERROR `test` attribute cannot be used at crate level
 
-#![test_case]//~ ERROR cannot determine resolution for the attribute macro `test_case`
+#![test_case]
 //~^ ERROR `test_case` attribute cannot be used at crate level
 
-#![bench]//~ ERROR cannot determine resolution for the attribute macro `bench`
+#![bench]
 //~^ ERROR `bench` attribute cannot be used at crate level
 
-#![global_allocator]//~ ERROR cannot determine resolution for the attribute macro `global_allocator`
+#![global_allocator]
 //~^ ERROR `global_allocator` attribute cannot be used at crate level
 
 fn main() {}

tests/ui/derives/issue-36617.stderr

@@ -1,43 +1,3 @@
-error: cannot determine resolution for the attribute macro `derive`
-  --> $DIR/issue-36617.rs:1:4
-   |
-LL | #![derive(Copy)]
-   |    ^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the attribute macro `test`
-  --> $DIR/issue-36617.rs:4:4
-   |
-LL | #![test]
-   |    ^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the attribute macro `test_case`
-  --> $DIR/issue-36617.rs:7:4
-   |
-LL | #![test_case]
-   |    ^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the attribute macro `bench`
-  --> $DIR/issue-36617.rs:10:4
-   |
-LL | #![bench]
-   |    ^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the attribute macro `global_allocator`
-  --> $DIR/issue-36617.rs:13:4
-   |
-LL | #![global_allocator]
-   |    ^^^^^^^^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: `derive` attribute cannot be used at crate level
   --> $DIR/issue-36617.rs:1:1
    |
@@ -113,5 +73,5 @@ LL - #![global_allocator]
 LL + #[global_allocator]
    |
 
-error: aborting due to 10 previous errors
+error: aborting due to 5 previous errors
 

tests/ui/extenv/issue-55897.rs

@@ -4,7 +4,6 @@ mod unresolved_env {
     use env; //~ ERROR unresolved import `env`
 
     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
-    //~^ ERROR cannot determine resolution for the macro `env`
 }
 
 mod nonexistent_env {

tests/ui/extenv/issue-55897.stderr

@@ -1,5 +1,5 @@
 error: environment variable `NON_EXISTENT` not defined at compile time
-  --> $DIR/issue-55897.rs:11:22
+  --> $DIR/issue-55897.rs:10:22
    |
 LL |     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
    |                      ^^^^^^^^^^^^^^^^^^^^
@@ -8,7 +8,7 @@ LL |     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
    = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: suffixes on string literals are invalid
-  --> $DIR/issue-55897.rs:16:22
+  --> $DIR/issue-55897.rs:15:22
    |
 LL |     include!(concat!("NON_EXISTENT"suffix, "/data.rs"));
    |                      ^^^^^^^^^^^^^^^^^^^^ invalid suffix `suffix`
@@ -33,14 +33,6 @@ help: consider importing this module instead
 LL |     use std::env;
    |         ~~~~~~~~
 
-error: cannot determine resolution for the macro `env`
-  --> $DIR/issue-55897.rs:6:22
-   |
-LL |     include!(concat!(env!("NON_EXISTENT"), "/data.rs"));
-   |                      ^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: aborting due to 5 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0432`.

tests/ui/feature-gates/issue-43106-gating-of-bench.rs

@@ -5,6 +5,5 @@
 #![feature(custom_inner_attributes)]
 
 #![bench                   = "4100"]
-//~^ ERROR cannot determine resolution for the attribute macro `bench`
-//~^^ ERROR `bench` attribute cannot be used at crate level
+//~^ ERROR `bench` attribute cannot be used at crate level
 fn main() {}

tests/ui/feature-gates/issue-43106-gating-of-bench.stderr

@@ -1,17 +1,9 @@
-error: cannot determine resolution for the attribute macro `bench`
-  --> $DIR/issue-43106-gating-of-bench.rs:7:4
-   |
-LL | #![bench                   = "4100"]
-   |    ^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: `bench` attribute cannot be used at crate level
   --> $DIR/issue-43106-gating-of-bench.rs:7:1
    |
 LL | #![bench                   = "4100"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-...
+LL |
 LL | fn main() {}
    |    ---- the inner attribute doesn't annotate this function
    |
@@ -21,5 +13,5 @@ LL - #![bench                   = "4100"]
 LL + #[bench                   = "4100"]
    |
 
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 

tests/ui/feature-gates/issue-43106-gating-of-test.rs

@@ -2,6 +2,5 @@
 
 #![allow(soft_unstable)]
 #![test                    = "4200"]
-//~^ ERROR cannot determine resolution for the attribute macro `test`
-//~^^ ERROR `test` attribute cannot be used at crate level
+//~^ ERROR `test` attribute cannot be used at crate level
 fn main() {}

tests/ui/feature-gates/issue-43106-gating-of-test.stderr

@@ -1,17 +1,9 @@
-error: cannot determine resolution for the attribute macro `test`
-  --> $DIR/issue-43106-gating-of-test.rs:4:4
-   |
-LL | #![test                    = "4200"]
-   |    ^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: `test` attribute cannot be used at crate level
   --> $DIR/issue-43106-gating-of-test.rs:4:1
    |
 LL | #![test                    = "4200"]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-...
+LL |
 LL | fn main() {}
    |    ---- the inner attribute doesn't annotate this function
    |
@@ -21,5 +13,5 @@ LL - #![test                    = "4200"]
 LL + #[test                    = "4200"]
    |
 
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 

tests/ui/imports/issue-28134.rs

@@ -1,5 +1,5 @@
 // compile-flags: --test
 
 #![allow(soft_unstable)]
-#![test] //~ ERROR cannot determine resolution for the attribute macro `test`
+#![test]
 //~^ ERROR 4:1: 4:9: `test` attribute cannot be used at crate level

tests/ui/imports/issue-28134.stderr

@@ -1,11 +1,3 @@
-error: cannot determine resolution for the attribute macro `test`
-  --> $DIR/issue-28134.rs:4:4
-   |
-LL | #![test]
-   |    ^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: `test` attribute cannot be used at crate level
   --> $DIR/issue-28134.rs:4:1
    |
@@ -18,5 +10,5 @@ LL - #![test]
 LL + #[test]
    |
 
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 

tests/ui/imports/issue-55457.rs

@@ -1,10 +1,9 @@
 use NonExistent; //~ ERROR unresolved import `NonExistent`
 use non_existent::non_existent; //~ ERROR unresolved import `non_existent`
 
-#[non_existent] //~ ERROR cannot determine resolution for the attribute macro `non_existent`
-#[derive(NonExistent)] //~ ERROR cannot determine resolution for the derive macro `NonExistent`
-                       //~| ERROR cannot determine resolution for the derive macro `NonExistent`
-                       //~| ERROR cannot determine resolution for the derive macro `NonExistent`
+#[non_existent]
+#[derive(NonExistent)]
+
 struct S;
 
 fn main() {}

tests/ui/imports/issue-55457.stderr

@@ -15,40 +15,6 @@ LL | use non_existent::non_existent;
    |
    = help: consider adding `extern crate non_existent` to use the `non_existent` crate
 
-error: cannot determine resolution for the derive macro `NonExistent`
-  --> $DIR/issue-55457.rs:5:10
-   |
-LL | #[derive(NonExistent)]
-   |          ^^^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the attribute macro `non_existent`
-  --> $DIR/issue-55457.rs:4:3
-   |
-LL | #[non_existent]
-   |   ^^^^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: cannot determine resolution for the derive macro `NonExistent`
-  --> $DIR/issue-55457.rs:5:10
-   |
-LL | #[derive(NonExistent)]
-   |          ^^^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
-
-error: cannot determine resolution for the derive macro `NonExistent`
-  --> $DIR/issue-55457.rs:5:10
-   |
-LL | #[derive(NonExistent)]
-   |          ^^^^^^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
-
-error: aborting due to 6 previous errors
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0432`.

tests/ui/imports/issue-59764.rs

@@ -128,7 +128,6 @@ use issue_59764::foo::makro;
 //~^ ERROR unresolved import `issue_59764::foo::makro` [E0432]
 
 makro!(bar);
-//~^ ERROR cannot determine resolution for the macro `makro`
 
 fn main() {
     bar();

tests/ui/imports/issue-59764.stderr

@@ -226,21 +226,13 @@ help: a macro with this name exists at the root of the crate
 LL | use issue_59764::makro;
    |     ~~~~~~~~~~~~~~~~~~
 
-error: cannot determine resolution for the macro `makro`
-  --> $DIR/issue-59764.rs:130:1
-   |
-LL | makro!(bar);
-   | ^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error[E0425]: cannot find function `bar` in this scope
-  --> $DIR/issue-59764.rs:134:5
+  --> $DIR/issue-59764.rs:133:5
    |
 LL |     bar();
    |     ^^^ not found in this scope
 
-error: aborting due to 18 previous errors
+error: aborting due to 17 previous errors
 
 Some errors have detailed explanations: E0425, E0432.
 For more information about an error, try `rustc --explain E0425`.

tests/ui/proc-macro/derive-helper-legacy-spurious.rs

@@ -5,7 +5,7 @@
 #[macro_use]
 extern crate test_macros;
 
-#[derive(Empty)] //~ ERROR cannot determine resolution for the attribute macro `derive`
+#[derive(Empty)]
 #[empty_helper] //~ ERROR cannot find attribute `empty_helper` in this scope
 struct Foo {}
 

tests/ui/proc-macro/derive-helper-legacy-spurious.stderr

@@ -4,19 +4,11 @@ error: cannot find attribute `dummy` in this scope
 LL | #![dummy]
    |    ^^^^^
 
-error: cannot determine resolution for the attribute macro `derive`
-  --> $DIR/derive-helper-legacy-spurious.rs:8:3
-   |
-LL | #[derive(Empty)]
-   |   ^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: cannot find attribute `empty_helper` in this scope
   --> $DIR/derive-helper-legacy-spurious.rs:9:3
    |
 LL | #[empty_helper]
    |   ^^^^^^^^^^^^
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 

tests/ui/proc-macro/issue-118455-skip-err-builtin.rs

@@ -0,0 +1,6 @@
+#![some_nonexistent_attribute]
+//~^ ERROR cannot find attribute `some_nonexistent_attribute` in this scope
+#[derive(Debug)]
+pub struct SomeUserCode;
+
+fn main() {}

tests/ui/proc-macro/issue-118455-skip-err-builtin.stderr

@@ -0,0 +1,8 @@
+error: cannot find attribute `some_nonexistent_attribute` in this scope
+  --> $DIR/issue-118455-skip-err-builtin.rs:1:4
+   |
+LL | #![some_nonexistent_attribute]
+   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 1 previous error
+

tests/ui/proc-macro/issue-89566-suggest-fix-invalid-top-level-macro-attr.fixed

@@ -0,0 +1,6 @@
+// run-rustfix
+
+#[derive(Debug)] //~ ERROR `derive` attribute cannot be used at crate level
+struct Test {}
+
+fn main() {}

tests/ui/proc-macro/issue-89566-suggest-fix-invalid-top-level-macro-attr.rs

@@ -0,0 +1,6 @@
+// run-rustfix
+
+#![derive(Debug)] //~ ERROR `derive` attribute cannot be used at crate level
+struct Test {}
+
+fn main() {}

tests/ui/proc-macro/issue-89566-suggest-fix-invalid-top-level-macro-attr.stderr

@@ -0,0 +1,16 @@
+error: `derive` attribute cannot be used at crate level
+  --> $DIR/issue-89566-suggest-fix-invalid-top-level-macro-attr.rs:3:1
+   |
+LL | #![derive(Debug)]
+   | ^^^^^^^^^^^^^^^^^
+LL | struct Test {}
+   |        ---- the inner attribute doesn't annotate this struct
+   |
+help: perhaps you meant to use an outer attribute
+   |
+LL - #![derive(Debug)]
+LL + #[derive(Debug)]
+   |
+
+error: aborting due to 1 previous error
+

tests/ui/reserved/reserved-attr-on-macro.rs

@@ -7,5 +7,5 @@ macro_rules! foo {
 }
 
 fn main() {
-    foo!(); //~ ERROR cannot determine resolution for the macro `foo`
+    foo!();
 }

tests/ui/reserved/reserved-attr-on-macro.stderr

@@ -4,19 +4,11 @@ error: attributes starting with `rustc` are reserved for use by the `rustc` comp
 LL | #[rustc_attribute_should_be_reserved]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: cannot determine resolution for the macro `foo`
-  --> $DIR/reserved-attr-on-macro.rs:10:5
-   |
-LL |     foo!();
-   |     ^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: cannot find attribute `rustc_attribute_should_be_reserved` in this scope
   --> $DIR/reserved-attr-on-macro.rs:1:3
    |
 LL | #[rustc_attribute_should_be_reserved]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 

tests/ui/rust-2018/issue-54006.rs

@@ -8,6 +8,5 @@ use alloc::vec;
 
 pub fn foo() {
     let mut xs = vec![];
-    //~^ ERROR cannot determine resolution for the macro `vec`
     xs.push(0);
 }

tests/ui/rust-2018/issue-54006.stderr

@@ -4,14 +4,6 @@ error[E0432]: unresolved import `alloc`
 LL | use alloc::vec;
    |     ^^^^^ help: a similar path exists: `core::alloc`
 
-error: cannot determine resolution for the macro `vec`
-  --> $DIR/issue-54006.rs:10:18
-   |
-LL |     let mut xs = vec![];
-   |                  ^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0432`.

tests/ui/span/issue-43927-non-ADT-derive.rs

@@ -1,6 +1,5 @@
 #![derive(Debug, PartialEq, Eq)] // should be an outer attribute!
-//~^ ERROR cannot determine resolution for the attribute macro `derive`
-//~^^ ERROR `derive` attribute cannot be used at crate level
+//~^ ERROR `derive` attribute cannot be used at crate level
 struct DerivedOn;
 
 fn main() {}

tests/ui/span/issue-43927-non-ADT-derive.stderr

@@ -1,17 +1,9 @@
-error: cannot determine resolution for the attribute macro `derive`
-  --> $DIR/issue-43927-non-ADT-derive.rs:1:4
-   |
-LL | #![derive(Debug, PartialEq, Eq)] // should be an outer attribute!
-   |    ^^^^^^
-   |
-   = note: import resolution is stuck, try simplifying macro imports
-
 error: `derive` attribute cannot be used at crate level
   --> $DIR/issue-43927-non-ADT-derive.rs:1:1
    |
 LL | #![derive(Debug, PartialEq, Eq)] // should be an outer attribute!
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-...
+LL |
 LL | struct DerivedOn;
    |        --------- the inner attribute doesn't annotate this struct
    |
@@ -21,5 +13,5 @@ LL - #![derive(Debug, PartialEq, Eq)] // should be an outer attribute!
 LL + #[derive(Debug, PartialEq, Eq)] // should be an outer attribute!
    |
 
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error