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Auto merge of #24367 - ebfull:fix_ice_cat_expr, r=pnkfelix
An actual typeck error is the cause of many failed compilations but an unrelated bug is being reported instead. It is triggered because a typeck error is presumably not yet identified during compiler execution, which would normally bypass an invariant in the presence of other errors. In this particular situation, we delay the reporting of the bug until abort_if_errors(). Closes #23827, closes #24356, closes #23041, closes #22897, closes #23966, closes #24013, and closes #23729 **There is at least one situation where this bug may still be genuinely triggered (#23437).**
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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fn main() { } | ||
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// Before these errors would ICE as "cat_expr Errd" because the errors | ||
// were unknown when the bug was triggered. | ||
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fn unconstrained_type() { | ||
[]; | ||
//~^ ERROR cannot determine a type for this expression: unconstrained type | ||
} |
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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use std::any::Any; | ||
fn main() | ||
{ | ||
fn bar(x:i32) ->i32 { 3*x }; | ||
let b:Box<Any> = Box::new(bar as fn(_)->_); | ||
b.downcast_ref::<fn(_)->_>(); | ||
//~^ ERROR cannot determine a type for this expression: unconstrained type | ||
} |
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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fn main() { | ||
"".chars().fold(|_, _| (), ()); | ||
//~^ ERROR cannot determine a type for this expression: unconstrained type | ||
} |
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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fn main() { | ||
use std::mem::{transmute, swap}; | ||
let a = 1; | ||
let b = 2; | ||
unsafe {swap::<&mut _>(transmute(&a), transmute(&b))}; | ||
//~^ ERROR cannot determine a type for this expression: unconstrained type | ||
} |