[INFO] crate packet-stream-codec 0.2.0 is already in cache [INFO] extracting crate packet-stream-codec 0.2.0 into work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/packet-stream-codec/0.2.0 [INFO] extracting crate packet-stream-codec 0.2.0 into work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/reg/packet-stream-codec/0.2.0 [INFO] validating manifest of packet-stream-codec-0.2.0 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 packet-stream-codec-0.2.0 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 packet-stream-codec-0.2.0 [INFO] finished frobbing packet-stream-codec-0.2.0 [INFO] frobbed toml for packet-stream-codec-0.2.0 written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/packet-stream-codec/0.2.0/Cargo.toml [INFO] started frobbing packet-stream-codec-0.2.0 [INFO] finished frobbing packet-stream-codec-0.2.0 [INFO] frobbed toml for packet-stream-codec-0.2.0 written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/reg/packet-stream-codec/0.2.0/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 `futures = "^0.2.0-alpha"` [INFO] [stderr] candidate versions found which didn't match: 0.1.25, 0.1.24, 0.1.23, ... [INFO] [stderr] location searched: crates.io index [INFO] [stderr] required by package `packet-stream-codec v0.2.0 (/mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/reg/packet-stream-codec/0.2.0)` [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