diff --git a/compiler/rustc_builtin_macros/src/assert.rs b/compiler/rustc_builtin_macros/src/assert.rs index 855da5caa312c..013258a1b4efa 100644 --- a/compiler/rustc_builtin_macros/src/assert.rs +++ b/compiler/rustc_builtin_macros/src/assert.rs @@ -1,8 +1,8 @@ mod context; -use rustc_ast::token::Delimiter; +use rustc_ast::token::{self, Delimiter}; use rustc_ast::tokenstream::{DelimSpan, TokenStream}; -use rustc_ast::{DelimArgs, Expr, ExprKind, MacCall, Path, PathSegment, UnOp, token}; +use rustc_ast::{DelimArgs, Expr, ExprKind, MacCall, Path, PathSegment}; use rustc_ast_pretty::pprust; use rustc_errors::PResult; use rustc_expand::base::{DummyResult, ExpandResult, ExtCtxt, MacEager, MacroExpanderResult}; @@ -29,7 +29,7 @@ pub(crate) fn expand_assert<'cx>( // `core::panic` and `std::panic` are different macros, so we use call-site // context to pick up whichever is currently in scope. - let call_site_span = cx.with_call_site_ctxt(span); + let call_site_span = cx.with_call_site_ctxt(cond_expr.span); let panic_path = || { if use_panic_2021(span) { @@ -63,7 +63,7 @@ pub(crate) fn expand_assert<'cx>( }), })), ); - expr_if_not(cx, call_site_span, cond_expr, then, None) + assert_cond_check(cx, call_site_span, cond_expr, then) } // If `generic_assert` is enabled, generates rich captured outputs // @@ -88,26 +88,33 @@ pub(crate) fn expand_assert<'cx>( )), )], ); - expr_if_not(cx, call_site_span, cond_expr, then, None) + assert_cond_check(cx, call_site_span, cond_expr, then) }; ExpandResult::Ready(MacEager::expr(expr)) } +/// `assert!($cond_expr, $custom_message)` struct Assert { cond_expr: Box, custom_message: Option, } -// if !{ ... } { ... } else { ... } -fn expr_if_not( - cx: &ExtCtxt<'_>, - span: Span, - cond: Box, - then: Box, - els: Option>, -) -> Box { - cx.expr_if(span, cx.expr(span, ExprKind::Unary(UnOp::Not, cond)), then, els) +/// `match { true => {} _ => }` +fn assert_cond_check(cx: &ExtCtxt<'_>, span: Span, cond: Box, then: Box) -> Box { + // Instead of expanding to `if ! { }`, we expand to + // `match { true => {} _ => }`. + // This allows us to always complain about mismatched types instead of "cannot apply unary + // operator `!` to type `X`" when passing an invalid ``, while also allowing `` to + // be `&true`. + let els = cx.expr_block(cx.block(span, thin_vec![])); + let mut arms = thin_vec![]; + arms.push(cx.arm(span, cx.pat_lit(span, cx.expr_bool(span, true)), els)); + arms.push(cx.arm(span, cx.pat_wild(span), then)); + + // We wrap the `match` in a statement to limit the length of any borrows introduced in the + // condition. + cx.expr_block(cx.block(span, [cx.stmt_expr(cx.expr_match(span, cond, arms))].into())) } fn parse_assert<'a>(cx: &ExtCtxt<'a>, sp: Span, stream: TokenStream) -> PResult<'a, Assert> { diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs index 8551780bcd5f4..4c7a7e93648a5 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/mod.rs @@ -1620,8 +1620,18 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { { let e = self.tcx.erase_regions(e); let f = self.tcx.erase_regions(f); - let expected = with_forced_trimmed_paths!(e.sort_string(self.tcx)); - let found = with_forced_trimmed_paths!(f.sort_string(self.tcx)); + let mut expected = with_forced_trimmed_paths!(e.sort_string(self.tcx)); + let mut found = with_forced_trimmed_paths!(f.sort_string(self.tcx)); + if let ObligationCauseCode::Pattern { span, .. } = cause.code() + && let Some(span) = span + && !span.from_expansion() + && cause.span.from_expansion() + { + // When the type error comes from a macro like `assert!()`, and we are pointing at + // code the user wrote the cause and effect are reversed as the expected value is + // what the macro expanded to. + (found, expected) = (expected, found); + } if expected == found { label_or_note(span, terr.to_string(self.tcx)); } else { @@ -2144,7 +2154,9 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { ) -> Option<(DiagStyledString, DiagStyledString)> { match values { ValuePairs::Regions(exp_found) => self.expected_found_str(exp_found), - ValuePairs::Terms(exp_found) => self.expected_found_str_term(exp_found, long_ty_path), + ValuePairs::Terms(exp_found) => { + self.expected_found_str_term(cause, exp_found, long_ty_path) + } ValuePairs::Aliases(exp_found) => self.expected_found_str(exp_found), ValuePairs::ExistentialTraitRef(exp_found) => self.expected_found_str(exp_found), ValuePairs::ExistentialProjection(exp_found) => self.expected_found_str(exp_found), @@ -2183,6 +2195,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { fn expected_found_str_term( &self, + cause: &ObligationCause<'tcx>, exp_found: ty::error::ExpectedFound>, long_ty_path: &mut Option, ) -> Option<(DiagStyledString, DiagStyledString)> { @@ -2190,8 +2203,27 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> { if exp_found.references_error() { return None; } + let (mut expected, mut found) = (exp_found.expected, exp_found.found); + + if let ObligationCauseCode::Pattern { span, .. } = cause.code() + && let Some(span) = span + && !span.from_expansion() + && cause.span.from_expansion() + { + // When the type error comes from a macro like `assert!()`, and we are pointing at + // code the user wrote, the cause and effect are reversed as the expected value is + // what the macro expanded to. So if the user provided a `Type` when the macro is + // written in such a way that a `bool` was expected, we want to print: + // = note: expected `bool` + // found `Type`" + // but as far as the compiler is concerned, after expansion what was expected was `Type` + // = note: expected `Type` + // found `bool`" + // so we reverse them here to match user expectation. + (expected, found) = (found, expected); + } - Some(match (exp_found.expected.kind(), exp_found.found.kind()) { + Some(match (expected.kind(), found.kind()) { (ty::TermKind::Ty(expected), ty::TermKind::Ty(found)) => { let (mut exp, mut fnd) = self.cmp(expected, found); // Use the terminal width as the basis to determine when to compress the printed diff --git a/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs b/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs index cf0c85990b150..788a04357b1e2 100644 --- a/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs +++ b/src/tools/clippy/clippy_lints/src/missing_asserts_for_indexing.rs @@ -11,7 +11,7 @@ use rustc_ast::{BinOpKind, LitKind, RangeLimits}; use rustc_data_structures::packed::Pu128; use rustc_data_structures::unhash::UnindexMap; use rustc_errors::{Applicability, Diag}; -use rustc_hir::{Block, Body, Expr, ExprKind, UnOp}; +use rustc_hir::{Body, Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::declare_lint_pass; use rustc_span::source_map::Spanned; @@ -135,12 +135,12 @@ fn assert_len_expr<'hir>( cx: &LateContext<'_>, expr: &'hir Expr<'hir>, ) -> Option<(LengthComparison, usize, &'hir Expr<'hir>)> { - let (cmp, asserted_len, slice_len) = if let Some(higher::If { cond, then, .. }) = higher::If::hir(expr) - && let ExprKind::Unary(UnOp::Not, condition) = &cond.kind - && let ExprKind::Binary(bin_op, left, right) = &condition.kind + let (cmp, asserted_len, slice_len) = if let Some( + higher::IfLetOrMatch::Match(cond, [_, then], _) + ) = higher::IfLetOrMatch::parse(cx, expr) + && let ExprKind::Binary(bin_op, left, right) = &cond.kind // check if `then` block has a never type expression - && let ExprKind::Block(Block { expr: Some(then_expr), .. }, _) = then.kind - && cx.typeck_results().expr_ty(then_expr).is_never() + && cx.typeck_results().expr_ty(then.body).is_never() { len_comparison(bin_op.node, left, right)? } else if let Some((macro_call, bin_op)) = first_node_macro_backtrace(cx, expr).find_map(|macro_call| { diff --git a/src/tools/clippy/tests/ui/const_is_empty.rs b/src/tools/clippy/tests/ui/const_is_empty.rs index 8bb4f0e5d9750..63c6342a323ce 100644 --- a/src/tools/clippy/tests/ui/const_is_empty.rs +++ b/src/tools/clippy/tests/ui/const_is_empty.rs @@ -196,6 +196,7 @@ fn issue_13106() { const { assert!(EMPTY_STR.is_empty()); + //~^ const_is_empty } const { diff --git a/src/tools/clippy/tests/ui/const_is_empty.stderr b/src/tools/clippy/tests/ui/const_is_empty.stderr index 2ba189058e832..9a42518698e39 100644 --- a/src/tools/clippy/tests/ui/const_is_empty.stderr +++ b/src/tools/clippy/tests/ui/const_is_empty.stderr @@ -158,10 +158,16 @@ LL | let _ = val.is_empty(); | ^^^^^^^^^^^^^^ error: this expression always evaluates to true - --> tests/ui/const_is_empty.rs:202:9 + --> tests/ui/const_is_empty.rs:198:17 + | +LL | assert!(EMPTY_STR.is_empty()); + | ^^^^^^^^^^^^^^^^^^^^ + +error: this expression always evaluates to true + --> tests/ui/const_is_empty.rs:203:9 | LL | EMPTY_STR.is_empty(); | ^^^^^^^^^^^^^^^^^^^^ -error: aborting due to 27 previous errors +error: aborting due to 28 previous errors diff --git a/src/tools/clippy/tests/ui/incompatible_msrv.rs b/src/tools/clippy/tests/ui/incompatible_msrv.rs index f7f21e1850d0a..882f909e30c97 100644 --- a/src/tools/clippy/tests/ui/incompatible_msrv.rs +++ b/src/tools/clippy/tests/ui/incompatible_msrv.rs @@ -1,6 +1,6 @@ #![warn(clippy::incompatible_msrv)] #![feature(custom_inner_attributes)] -#![allow(stable_features)] +#![allow(stable_features, clippy::diverging_sub_expression)] #![feature(strict_provenance)] // For use in test #![clippy::msrv = "1.3.0"] diff --git a/tests/ui/codemap_tests/issue-28308.rs b/tests/ui/codemap_tests/issue-28308.rs index 81493f8c45311..b0e04d0f1f6b1 100644 --- a/tests/ui/codemap_tests/issue-28308.rs +++ b/tests/ui/codemap_tests/issue-28308.rs @@ -1,4 +1,16 @@ fn main() { - assert!("foo"); - //~^ ERROR cannot apply unary operator `!` + assert!("foo"); //~ ERROR mismatched types + //~^ NOTE expected `bool`, found `str` + //~| NOTE in this expansion of assert! + let x = Some(&1); + assert!(x); //~ ERROR mismatched types + //~^ NOTE expected `bool`, found `Option<&{integer}>` + //~| NOTE expected enum `bool` + //~| NOTE in this expansion of assert! + //~| NOTE in this expansion of assert! + assert!(x, ""); //~ ERROR mismatched types + //~^ NOTE expected `bool`, found `Option<&{integer}>` + //~| NOTE expected enum `bool` + //~| NOTE in this expansion of assert! + //~| NOTE in this expansion of assert! } diff --git a/tests/ui/codemap_tests/issue-28308.stderr b/tests/ui/codemap_tests/issue-28308.stderr index 7bc9e05dfc024..e84ceb44aacba 100644 --- a/tests/ui/codemap_tests/issue-28308.stderr +++ b/tests/ui/codemap_tests/issue-28308.stderr @@ -1,9 +1,27 @@ -error[E0600]: cannot apply unary operator `!` to type `&'static str` - --> $DIR/issue-28308.rs:2:5 +error[E0308]: mismatched types + --> $DIR/issue-28308.rs:2:13 | LL | assert!("foo"); - | ^^^^^^^^^^^^^^ cannot apply unary operator `!` + | ^^^^^ expected `bool`, found `str` -error: aborting due to 1 previous error +error[E0308]: mismatched types + --> $DIR/issue-28308.rs:6:13 + | +LL | assert!(x); + | ^ expected `bool`, found `Option<&{integer}>` + | + = note: expected enum `bool` + found type `Option<&{integer}>` + +error[E0308]: mismatched types + --> $DIR/issue-28308.rs:11:13 + | +LL | assert!(x, ""); + | ^ expected `bool`, found `Option<&{integer}>` + | + = note: expected enum `bool` + found type `Option<&{integer}>` + +error: aborting due to 3 previous errors -For more information about this error, try `rustc --explain E0600`. +For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/consts/control-flow/assert.stderr b/tests/ui/consts/control-flow/assert.stderr index 026097a6ba0e1..deaad6abbccf6 100644 --- a/tests/ui/consts/control-flow/assert.stderr +++ b/tests/ui/consts/control-flow/assert.stderr @@ -1,8 +1,8 @@ error[E0080]: evaluation panicked: assertion failed: false - --> $DIR/assert.rs:5:15 + --> $DIR/assert.rs:5:23 | LL | const _: () = assert!(false); - | ^^^^^^^^^^^^^^ evaluation of `_` failed here + | ^^^^^ evaluation of `_` failed here error: aborting due to 1 previous error diff --git a/tests/ui/generics/post_monomorphization_error_backtrace.stderr b/tests/ui/generics/post_monomorphization_error_backtrace.stderr index 6953414f0c235..92c7df73638f5 100644 --- a/tests/ui/generics/post_monomorphization_error_backtrace.stderr +++ b/tests/ui/generics/post_monomorphization_error_backtrace.stderr @@ -1,8 +1,8 @@ error[E0080]: evaluation panicked: assertion failed: std::mem::size_of::() == 0 - --> $DIR/post_monomorphization_error_backtrace.rs:6:23 + --> $DIR/post_monomorphization_error_backtrace.rs:6:31 | LL | const V: () = assert!(std::mem::size_of::() == 0); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `assert_zst::F::::V` failed here + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `assert_zst::F::::V` failed here note: erroneous constant encountered --> $DIR/post_monomorphization_error_backtrace.rs:14:5 @@ -17,10 +17,10 @@ LL | assert_zst::() | ^^^^^^^^^^^^^^^^^ error[E0080]: evaluation panicked: assertion failed: std::mem::size_of::() == 0 - --> $DIR/post_monomorphization_error_backtrace.rs:6:23 + --> $DIR/post_monomorphization_error_backtrace.rs:6:31 | LL | const V: () = assert!(std::mem::size_of::() == 0); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `assert_zst::F::::V` failed here + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `assert_zst::F::::V` failed here note: erroneous constant encountered --> $DIR/post_monomorphization_error_backtrace.rs:14:5 diff --git a/tests/ui/inline-const/const-expr-generic-err.stderr b/tests/ui/inline-const/const-expr-generic-err.stderr index 26039ba6d4449..e053e88db172f 100644 --- a/tests/ui/inline-const/const-expr-generic-err.stderr +++ b/tests/ui/inline-const/const-expr-generic-err.stderr @@ -1,8 +1,8 @@ error[E0080]: evaluation panicked: assertion failed: std::mem::size_of::() == 0 - --> $DIR/const-expr-generic-err.rs:4:13 + --> $DIR/const-expr-generic-err.rs:4:21 | LL | const { assert!(std::mem::size_of::() == 0); } - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `foo::::{constant#0}` failed here + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `foo::::{constant#0}` failed here note: erroneous constant encountered --> $DIR/const-expr-generic-err.rs:4:5 diff --git a/tests/ui/macros/assert-macro-lifetimes.rs b/tests/ui/macros/assert-macro-lifetimes.rs new file mode 100644 index 0000000000000..cc25928320477 --- /dev/null +++ b/tests/ui/macros/assert-macro-lifetimes.rs @@ -0,0 +1,8 @@ +//@ check-pass +#[derive(PartialEq, Eq, Hash)] +struct S; +fn main() { + let foo = std::rc::Rc::new(std::cell::RefCell::new(std::collections::HashMap::::new())); + // Ensure that the lifetimes of the borrow do not leak past the end of `main`. + assert!(matches!(foo.borrow().get(&S).unwrap(), S)) +} diff --git a/tests/ui/simd/const-err-trumps-simd-err.stderr b/tests/ui/simd/const-err-trumps-simd-err.stderr index 93d1fce637f2f..6d25a28c92c5c 100644 --- a/tests/ui/simd/const-err-trumps-simd-err.stderr +++ b/tests/ui/simd/const-err-trumps-simd-err.stderr @@ -1,8 +1,8 @@ error[E0080]: evaluation panicked: assertion failed: LANE < 4 - --> $DIR/const-err-trumps-simd-err.rs:17:13 + --> $DIR/const-err-trumps-simd-err.rs:17:21 | LL | const { assert!(LANE < 4); } // the error should be here... - | ^^^^^^^^^^^^^^^^^ evaluation of `get_elem::<4>::{constant#0}` failed here + | ^^^^^^^^ evaluation of `get_elem::<4>::{constant#0}` failed here note: erroneous constant encountered --> $DIR/const-err-trumps-simd-err.rs:17:5 diff --git a/tests/ui/transmutability/uninhabited.stderr b/tests/ui/transmutability/uninhabited.stderr index 4757daec9978a..9f289852809c2 100644 --- a/tests/ui/transmutability/uninhabited.stderr +++ b/tests/ui/transmutability/uninhabited.stderr @@ -41,10 +41,10 @@ LL | | }> | |__________^ required by this bound in `is_maybe_transmutable` error[E0080]: evaluation panicked: assertion failed: false - --> $DIR/uninhabited.rs:41:9 + --> $DIR/uninhabited.rs:41:17 | LL | assert!(false); - | ^^^^^^^^^^^^^^ evaluation of `yawning_void_struct::_` failed here + | ^^^^^ evaluation of `yawning_void_struct::_` failed here error[E0277]: `()` cannot be safely transmuted into `yawning_void_enum::Void` --> $DIR/uninhabited.rs:71:41 @@ -68,10 +68,10 @@ LL | | }> | |__________^ required by this bound in `is_maybe_transmutable` error[E0080]: evaluation panicked: assertion failed: false - --> $DIR/uninhabited.rs:63:9 + --> $DIR/uninhabited.rs:63:17 | LL | assert!(false); - | ^^^^^^^^^^^^^^ evaluation of `yawning_void_enum::_` failed here + | ^^^^^ evaluation of `yawning_void_enum::_` failed here error[E0277]: `u128` cannot be safely transmuted into `DistantVoid` --> $DIR/uninhabited.rs:92:43 @@ -95,10 +95,10 @@ LL | | }> | |__________^ required by this bound in `is_maybe_transmutable` error[E0080]: evaluation panicked: assertion failed: false - --> $DIR/uninhabited.rs:87:9 + --> $DIR/uninhabited.rs:87:17 | LL | assert!(false); - | ^^^^^^^^^^^^^^ evaluation of `distant_void::_` failed here + | ^^^^^ evaluation of `distant_void::_` failed here error[E0277]: `Src` cannot be safely transmuted into `issue_126267::Error` --> $DIR/uninhabited.rs:108:42