Rust errors / Names, paths and imports
Rust compiler error · checked with rustc 1.99.0
Rust error E0093: unrecognized intrinsic function: `foo`
What it meansAn unknown intrinsic function was declared.
What rustc prints
error[E0093]: unrecognized intrinsic function: `foo` --> main.rs:5:11 | 5 | unsafe fn foo(); // error: unrecognized intrinsic function: `foo` | ^^^ unrecognized intrinsic | = help: if you're adding an intrinsic, be sure to update `check_intrinsic_type`
Real output of rustc 1.99.0 compiling the official example below (2021 edition). Your names and line numbers will differ; the first line is the part to match.
E0093Names, paths and imports
Activein rustc 1.99.0
8related errors linked below
The compiler team's explanation
An unknown intrinsic function was declared.
Erroneous code example:
#![feature(intrinsics)]
#![allow(internal_features)]
#[rustc_intrinsic]
unsafe fn foo(); // error: unrecognized intrinsic function: `foo`
fn main() {
unsafe {
foo();
}
}Please check you didn't make a mistake in the function's name. All intrinsic functions are defined in library/core/src/intrinsics in the Rust source code.
From rustc --explain E0093 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.
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