bug: build error for cairo-lang-sierra

[tarrencev]

Bug Report

Cairo version:

alpha7

Current behavior:

Using as a dependency causes issue:

error: failed to run custom build command for `cairo-lang-sierra v1.0.0-alpha.7`

Caused by:
  process didn't exit successfully: `/Users/tarrence/code/katana/target/debug/build/cairo-lang-sierra-049fee237d4c6ae7/build-script-build` (exit status: 1)
  --- stdout
  processing file `/Users/tarrence/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cairo-lang-sierra-1.0.0-alpha.7/src/parser.lalrpop`
  /Users/tarrence/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cairo-lang-sierra-1.0.0-alpha.7/src/parser.lalrpop:207:5: 207:16 error: invalid regular expression: regex parse error:
      \s*
      ^^
  error: Unicode-aware Perl class not found (make sure the unicode-perl feature is enabled)

  --- stderr
        r"\s*" => {},
        ~~~~~~~~~~~~
warning: build failed, waiting for other jobs to finish...

Expected behavior:

No error

Steps to reproduce:

Import + build

Other information:

It seems this is likely a result of this version bump here: rust-lang/regex@4e29fce

See: rust-lang/regex#982

We should fully specify the dep version here:

cairo/crates/cairo-lang-sierra/Cargo.toml

Line 12 in 89e4400

regex = "1"