[INFO] crate blindsign 0.0.6 is already in cache
[INFO] extracting crate blindsign 0.0.6 into work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/blindsign/0.0.6
[INFO] extracting crate blindsign 0.0.6 into work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/blindsign/0.0.6
[INFO] validating manifest of blindsign-0.0.6 on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of blindsign-0.0.6 on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing blindsign-0.0.6
[INFO] finished frobbing blindsign-0.0.6
[INFO] frobbed toml for blindsign-0.0.6 written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/blindsign/0.0.6/Cargo.toml
[INFO] started frobbing blindsign-0.0.6
[INFO] finished frobbing blindsign-0.0.6
[INFO] frobbed toml for blindsign-0.0.6 written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/blindsign/0.0.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `curve25519-dalek = "^0.17"`
[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 `blindsign v0.0.6 (/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/blindsign/0.0.6)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed