[INFO] updating cached repository mayflower/duck
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mayflower/duck
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mayflower/duck" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/mayflower/duck"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/mayflower/duck'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mayflower/duck" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/mayflower/duck"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/mayflower/duck'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e5c1ee04dca9284ee552f5925ec511e4c9b2dd81
[INFO] sha for GitHub repo mayflower/duck: e5c1ee04dca9284ee552f5925ec511e4c9b2dd81
[INFO] validating manifest of mayflower/duck on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mayflower/duck on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mayflower/duck
[INFO] finished frobbing mayflower/duck
[INFO] frobbed toml for mayflower/duck written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/mayflower/duck/Cargo.toml
[INFO] started frobbing mayflower/duck
[INFO] finished frobbing mayflower/duck
[INFO] frobbed toml for mayflower/duck written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/mayflower/duck/Cargo.toml
[INFO] crate mayflower/duck already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/mayflower/duck/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mayflower/duck against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-0/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/mayflower/duck:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5866ced378628cf2764a9c10d74b975ae98f74e6c5cd599f1f28fae237843b39
[INFO] running `"docker" "start" "-a" "5866ced378628cf2764a9c10d74b975ae98f74e6c5cd599f1f28fae237843b39"`
[INFO] [stderr] error: multiple packages link to native library `z`, but a native library can be linked only once
[INFO] [stderr] 
[INFO] [stderr] package `libz-sys v1.0.25`
[INFO] [stderr]     ... which is depended on by `curl-sys v0.1.35`
[INFO] [stderr]     ... which is depended on by `curl v0.2.19`
[INFO] [stderr]     ... which is depended on by `cargo v0.5.0`
[INFO] [stderr]     ... which is depended on by `duck v0.0.1 (/opt/crater/workdir)`
[INFO] [stderr] links to native library `z`
[INFO] [stderr] 
[INFO] [stderr] package `libz-sys v0.1.9`
[INFO] [stderr]     ... which is depended on by `libgit2-sys v0.2.20`
[INFO] [stderr]     ... which is depended on by `cargo v0.5.0`
[INFO] [stderr]     ... which is depended on by `duck v0.0.1 (/opt/crater/workdir)`
[INFO] [stderr] also links to native library `z`
[INFO] running `"docker" "inspect" "5866ced378628cf2764a9c10d74b975ae98f74e6c5cd599f1f28fae237843b39"`
[INFO] running `"docker" "rm" "-f" "5866ced378628cf2764a9c10d74b975ae98f74e6c5cd599f1f28fae237843b39"`
[INFO] [stdout] 5866ced378628cf2764a9c10d74b975ae98f74e6c5cd599f1f28fae237843b39