[INFO] fetching crate safe_thing 0.0.3...
[INFO] testing safe_thing-0.0.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate safe_thing 0.0.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate safe_thing 0.0.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate safe_thing 0.0.3
[INFO] finished tweaking crates.io crate safe_thing 0.0.3
[INFO] tweaked toml for crates.io crate safe_thing 0.0.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7ad1cfac39f0e9e51acf7f6219664cda0dc16706450509e8ff3dccc8090f78d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b7ad1cfac39f0e9e51acf7f6219664cda0dc16706450509e8ff3dccc8090f78d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7ad1cfac39f0e9e51acf7f6219664cda0dc16706450509e8ff3dccc8090f78d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7ad1cfac39f0e9e51acf7f6219664cda0dc16706450509e8ff3dccc8090f78d", kill_on_drop: false }`
[INFO] [stdout] b7ad1cfac39f0e9e51acf7f6219664cda0dc16706450509e8ff3dccc8090f78d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c86021e38aebebb12812fbc6c3725a3762016cdd1ce05e22f140ab282615956b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c86021e38aebebb12812fbc6c3725a3762016cdd1ce05e22f140ab282615956b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.0.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling unwrap v1.2.1
[INFO] [stderr]    Compiling ucd-util v0.1.8
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling byte-tools v0.2.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling podio v0.1.7
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling sha1 v0.2.0
[INFO] [stderr]    Compiling tiny-keccak v1.3.1
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling ascii v0.9.3
[INFO] [stderr]    Compiling rustfmt v0.10.0
[INFO] [stderr]    Compiling jni-sys v0.3.0
[INFO] [stderr]    Compiling fake_clock v0.2.0
[INFO] [stderr]    Compiling alloc-no-stdlib v1.2.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling lru_time_cache v0.8.1
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.3
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling block-buffer v0.3.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling walkdir v2.0.1
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling brotli-decompressor v1.3.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling tokio-executor v0.1.9
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling extprim v1.7.1
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling libflate v0.1.27
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling generic-array v0.9.1
[INFO] [stderr]    Compiling tokio-timer v0.2.12
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling xmltree v0.3.2
[INFO] [stderr]    Compiling jni v0.10.2
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling strings v0.1.1
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling crossbeam-channel v0.3.7
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/context.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crossbeam_utils::Backoff;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/array.rs:23:23
[INFO] [stdout]    |
[INFO] [stdout] 23 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stdout]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/list.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stdout]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/zero.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/select.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crossbeam_utils::Backoff;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/utils.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling addr2line v0.16.0
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crossbeam-channel` due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c86021e38aebebb12812fbc6c3725a3762016cdd1ce05e22f140ab282615956b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c86021e38aebebb12812fbc6c3725a3762016cdd1ce05e22f140ab282615956b", kill_on_drop: false }`
[INFO] [stdout] c86021e38aebebb12812fbc6c3725a3762016cdd1ce05e22f140ab282615956b