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c98ea0d808
Print a backtrace in const eval if interrupted
Demo:
```rust
#![feature(const_eval_limit)]
#![const_eval_limit = "0"]
const OW: u64 = {
let mut res: u64 = 0;
let mut i = 0;
while i < u64::MAX {
res = res.wrapping_add(i);
i += 1;
}
res
};
fn main() {
println!("{}", OW);
}
```
```
╭ ➜ ben@archlinux:~/rust
╰ ➤ rustc +stage1 spin.rs
^Cerror[E0080]: evaluation of constant value failed
--> spin.rs:8:33
|
8 | res = res.wrapping_add(i);
| ^ Compilation was interrupted
note: erroneous constant used
--> spin.rs:15:20
|
15 | println!("{}", OW);
| ^^
note: erroneous constant used
--> spin.rs:15:20
|
15 | println!("{}", OW);
| ^^
|
= note: this note originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to previous error
For more information about this error, try `rustc --explain E0080`.
```
68 lines
2.2 KiB
Rust
68 lines
2.2 KiB
Rust
/*!
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Rust MIR: a lowered representation of Rust.
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*/
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#![allow(internal_features)]
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#![allow(rustc::diagnostic_outside_of_impl)]
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#![feature(rustdoc_internals)]
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#![doc(rust_logo)]
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#![feature(assert_matches)]
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#![feature(box_patterns)]
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#![feature(decl_macro)]
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#![feature(generic_nonzero)]
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#![feature(let_chains)]
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#![feature(slice_ptr_get)]
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#![feature(strict_provenance)]
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#![feature(never_type)]
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#![feature(trait_alias)]
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#![feature(try_blocks)]
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#![feature(yeet_expr)]
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#![feature(if_let_guard)]
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#[macro_use]
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extern crate tracing;
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#[macro_use]
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extern crate rustc_middle;
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pub mod const_eval;
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mod errors;
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pub mod interpret;
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pub mod transform;
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pub mod util;
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use std::sync::atomic::AtomicBool;
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pub use errors::ReportErrorExt;
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use rustc_middle::{ty, util::Providers};
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rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
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pub fn provide(providers: &mut Providers) {
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const_eval::provide(providers);
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providers.tag_for_variant = const_eval::tag_for_variant_provider;
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providers.eval_to_const_value_raw = const_eval::eval_to_const_value_raw_provider;
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providers.eval_to_allocation_raw = const_eval::eval_to_allocation_raw_provider;
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providers.eval_static_initializer = const_eval::eval_static_initializer_provider;
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providers.hooks.const_caller_location = util::caller_location::const_caller_location_provider;
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providers.eval_to_valtree = |tcx, param_env_and_value| {
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let (param_env, raw) = param_env_and_value.into_parts();
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const_eval::eval_to_valtree(tcx, param_env, raw)
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};
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providers.hooks.try_destructure_mir_constant_for_user_output =
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const_eval::try_destructure_mir_constant_for_user_output;
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providers.valtree_to_const_val = |tcx, (ty, valtree)| {
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const_eval::valtree_to_const_value(tcx, ty::ParamEnv::empty().and(ty), valtree)
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};
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providers.check_validity_requirement = |tcx, (init_kind, param_env_and_ty)| {
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util::check_validity_requirement(tcx, init_kind, param_env_and_ty)
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};
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}
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/// `rustc_driver::main` installs a handler that will set this to `true` if
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/// the compiler has been sent a request to shut down, such as by a Ctrl-C.
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/// This static lives here because it is only read by the interpreter.
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pub static CTRL_C_RECEIVED: AtomicBool = AtomicBool::new(false);
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