Z unleash-the-miri-inside-of-you doesnt skip const fn checks while constant evaluating

[HomelikeBrick42]

I tried this code with the -Zunleash-the-miri-inside-of-you flag:

const FOO: i32 = foo();

fn foo() -> i32 {
    5
}

This should work if i understand the flag correctly and make FOO have the value 5, but instead it gives me an evaluation error

error[E0080]: calling non-const function `foo`
 --> src\lib.rs:3:18
  |
3 | const FOO: i32 = foo();
  |                  ^^^^^ evaluation of `FOO` failed here

warning: skipping const checks
  |
help: skipping check that does not even have a feature gate
 --> src\lib.rs:3:18
  |
3 | const FOO: i32 = foo();
  |                  ^^^^^

For more information about this error, try `rustc --explain E0080`.

Meta

rustc --version --verbose:

rustc 1.94.0-nightly (f52090008 2025-12-10)
binary: rustc
commit-hash: f5209000832c9d3bc29c91f4daef4ca9f28dc797
commit-date: 2025-12-10
host: x86_64-pc-windows-msvc
release: 1.94.0-nightly

[bjorn3]

There is no way to just bypass the check for calls being const fn. We simply don't generate MIR suitable for const eval at all for non-const functions.

[HomelikeBrick42]

thats unfortunate :/