error[E0282]: type annotations needed
  --> $DIR/one-param-uninferred.rs:15:23
   |
LL |     let _: [u8; 17] = foo();
   |                       ^^^ cannot infer the value of const parameter `M` declared on the function `foo`
   |
help: consider specifying the const argument
   |
LL |     let _: [u8; 17] = foo::<M>();
   |                       ~~~~~~~~

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.