[INFO] crate u2f 0.1.2 is already in cache [INFO] extracting crate u2f 0.1.2 into work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/u2f/0.1.2 [INFO] extracting crate u2f 0.1.2 into work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/reg/u2f/0.1.2 [INFO] validating manifest of u2f-0.1.2 on toolchain master#2bde39b8edce6463e1c37f8a8082a875e7b536b1 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of u2f-0.1.2 on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing u2f-0.1.2 [INFO] finished frobbing u2f-0.1.2 [INFO] frobbed toml for u2f-0.1.2 written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/u2f/0.1.2/Cargo.toml [INFO] started frobbing u2f-0.1.2 [INFO] finished frobbing u2f-0.1.2 [INFO] frobbed toml for u2f-0.1.2 written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/reg/u2f/0.1.2/Cargo.toml [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-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"` [INFO] [stderr] candidate versions found which didn't match: 0.14.0, 0.13.5, 0.8.1 [INFO] [stderr] location searched: crates.io index [INFO] [stderr] required by package `u2f v0.1.2 (/mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/u2f/0.1.2)` [ERROR] this task or one of its parent failed! [ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed