Unknown size error in recent compilations

[weikengchen]

In a test upstream in marlin, there seem to be errors, probably related to Rust 1.48.

Any idea?

error[E0277]: the size for values of type `[u64]` cannot be known at compilation time
  --> bls12_381/src/fields/fq6.rs:15:9
   |
15 | /         field_new!(Fq, BigInteger384([
16 | |             0x760900000002fffd,
17 | |             0xebf4000bc40c0002,
18 | |             0x5f48985753c758ba,
...  |
21 | |             0x15f65ec3fa80e493,
22 | |         ])),
   | |___________^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[u64]`
   = note: all local variables must have a statically known size
   = help: unsized locals are gated as an unstable feature
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `[u64]` cannot be known at compilation time
  --> bn254/src/curves/g2.rs:52:30
   |
52 |       const COFACTOR_INV: Fr = field_new!(Fr, BigInteger256([
   |  ______________________________^
53 | |         0x7fff17d53ff2895e,
54 | |         0xd0617390cf7919e5,
55 | |         0xb9af426b22d0eb61,
56 | |         0x270485e31bd72a4d,
57 | |     ]));
   | |_______^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[u64]`
   = note: all local variables must have a statically known size
   = help: unsized locals are gated as an unstable feature
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `[u64]` cannot be known at compilation time
  --> bls12_381/src/fields/fq6.rs:23:9
   |
23 | /         field_new!(Fq, BigInteger384([
24 | |             0x760900000002fffd,
25 | |             0xebf4000bc40c0002,
26 | |             0x5f48985753c758ba,
...  |
29 | |             0x15f65ec3fa80e493,
30 | |         ])),
   | |___________^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[u64]`
   = note: all local variables must have a statically known size
   = help: unsized locals are gated as an unstable feature
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

[weikengchen]

I guess it may be related to this: https://github.com/arkworks-rs/algebra/commit/0fe93ccdea36eb877e77f009cd0edfc6a3907732

[Pratyush]

Yeah, I was just going to merge #19

[Pratyush]

should be fixed now!