[INFO] crate amazon_cognito_rust 0.1.4 is already in cache
[INFO] extracting crate amazon_cognito_rust 0.1.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/amazon_cognito_rust/0.1.4
[INFO] extracting crate amazon_cognito_rust 0.1.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/amazon_cognito_rust/0.1.4
[INFO] validating manifest of amazon_cognito_rust-0.1.4 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of amazon_cognito_rust-0.1.4 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing amazon_cognito_rust-0.1.4
[INFO] finished frobbing amazon_cognito_rust-0.1.4
[INFO] frobbed toml for amazon_cognito_rust-0.1.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/amazon_cognito_rust/0.1.4/Cargo.toml
[INFO] started frobbing amazon_cognito_rust-0.1.4
[INFO] finished frobbing amazon_cognito_rust-0.1.4
[INFO] frobbed toml for amazon_cognito_rust-0.1.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/amazon_cognito_rust/0.1.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `ring = "^0.11.0"`
[INFO] [stderr]   candidate versions found which didn't match: 0.16.5, 0.16.4, 0.16.3, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `amazon_cognito_rust v0.1.4 (/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/amazon_cognito_rust/0.1.4)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate amazon_cognito_rust-0.1.4 depends on yanked crates
[ERROR]