[INFO] crate dalek-credentials 0.0.0 is already in cache
[INFO] extracting crate dalek-credentials 0.0.0 into work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/dalek-credentials/0.0.0
[INFO] extracting crate dalek-credentials 0.0.0 into work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/dalek-credentials/0.0.0
[INFO] validating manifest of dalek-credentials-0.0.0 on toolchain master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dalek-credentials-0.0.0 on toolchain try#26f8d250bb3c8a85e812cf663c730ef9e0df9315
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dalek-credentials-0.0.0
[INFO] finished frobbing dalek-credentials-0.0.0
[INFO] frobbed toml for dalek-credentials-0.0.0 written to work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/dalek-credentials/0.0.0/Cargo.toml
[INFO] started frobbing dalek-credentials-0.0.0
[INFO] finished frobbing dalek-credentials-0.0.0
[INFO] frobbed toml for dalek-credentials-0.0.0 written to work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/dalek-credentials/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `curve25519-dalek = "^0.5"`
[INFO] [stderr]   candidate versions found which didn't match: 1.0.1, 0.21.0, 0.20.0, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `dalek-credentials v0.0.0 (/mnt/big/crater/work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/dalek-credentials/0.0.0)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed