[INFO] crate libpasta 0.1.0-rc2 is already in cache
[INFO] extracting crate libpasta 0.1.0-rc2 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/libpasta/0.1.0-rc2
[INFO] extracting crate libpasta 0.1.0-rc2 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/libpasta/0.1.0-rc2
[INFO] validating manifest of libpasta-0.1.0-rc2 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of libpasta-0.1.0-rc2 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing libpasta-0.1.0-rc2
[INFO] finished frobbing libpasta-0.1.0-rc2
[INFO] frobbed toml for libpasta-0.1.0-rc2 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/libpasta/0.1.0-rc2/Cargo.toml
[INFO] started frobbing libpasta-0.1.0-rc2
[INFO] finished frobbing libpasta-0.1.0-rc2
[INFO] frobbed toml for libpasta-0.1.0-rc2 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/libpasta/0.1.0-rc2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `ring = ">= 0.11, < 0.13"`
[INFO] [stderr]   candidate versions found which didn't match: 0.14.4, 0.14.3, 0.14.2, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `libpasta v0.1.0-rc2 (/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/libpasta/0.1.0-rc2)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed