[INFO] crate merkle_light 0.3.1 is already in cache
[INFO] extracting crate merkle_light 0.3.1 into work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/merkle_light/0.3.1
[INFO] extracting crate merkle_light 0.3.1 into work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/merkle_light/0.3.1
[INFO] validating manifest of merkle_light-0.3.1 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of merkle_light-0.3.1 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing merkle_light-0.3.1
[INFO] finished frobbing merkle_light-0.3.1
[INFO] frobbed toml for merkle_light-0.3.1 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/merkle_light/0.3.1/Cargo.toml
[INFO] started frobbing merkle_light-0.3.1
[INFO] finished frobbing merkle_light-0.3.1
[INFO] frobbed toml for merkle_light-0.3.1 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/reg/merkle_light/0.3.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `ring = "^0.12.1"`
[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 `merkle_light v0.3.1 (/mnt/big/crater/work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/reg/merkle_light/0.3.1)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate merkle_light-0.3.1 depends on yanked crates
[ERROR]