Cannot write integer literal for the minimum i128 (-0x8000_0000_0000_0000_0000_0000_0000_0000i128)

[kennytm]

Test case:

#![feature(i128_type)]
fn main() {
    -0x8000_0000_0000_0000i64;  // ok
    -0x8000_0000_0000_0000_0000_0000_0000_0000i128; // Error: attempt to negate with overflow
}

Gives error:

error[E0080]: constant evaluation error
 --> foo.rs:4:5
  |
4 |     -0x8000_0000_0000_0000_0000_0000_0000_0000i128; // Error: attempt to negate with overflow
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to negate with overflow

error: aborting due to previous error

It should compiles fine and the constant should produce the same value as i128::MIN.

For comparison the minimum i64 compiles fine with no warnings.

$ rustc -vV
rustc 1.16.0-nightly (47c8d9fdc 2017-01-08)
binary: rustc
commit-hash: 47c8d9fdcf2e6502cf4ca7d7f059fdc1a2810afa
commit-date: 2017-01-08
host: x86_64-apple-darwin
release: 1.16.0-nightly
LLVM version: 3.9

[est31]

cc @nagisa
cc #35118

[est31]

I'd want to give a try on this.