[INFO] crate safe_app 0.9.0 is already in cache
[INFO] extracting crate safe_app 0.9.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/safe_app/0.9.0
[INFO] extracting crate safe_app 0.9.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/safe_app/0.9.0
[INFO] validating manifest of safe_app-0.9.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of safe_app-0.9.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing safe_app-0.9.0
[INFO] removed 3 missing examples
[INFO] finished frobbing safe_app-0.9.0
[INFO] frobbed toml for safe_app-0.9.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/safe_app/0.9.0/Cargo.toml
[INFO] started frobbing safe_app-0.9.0
[INFO] removed 3 missing examples
[INFO] finished frobbing safe_app-0.9.0
[INFO] frobbed toml for safe_app-0.9.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/safe_app/0.9.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing safe_app-0.9.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/safe_app/0.9.0:/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] cdfdd1051d260f2df771eb66fff8ff2aa70b0fcaf7aef3a1a2e2dbc673778b9c
[INFO] running `"docker" "start" "-a" "cdfdd1051d260f2df771eb66fff8ff2aa70b0fcaf7aef3a1a2e2dbc673778b9c"`
[INFO] [stderr] warning: An explicit [[example]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other example targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a example target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/examples/gen_invites.rs
[INFO] [stderr] * /opt/crater/workdir/examples/self_authentication.rs
[INFO] [stderr] * /opt/crater/workdir/examples/client_stress_test.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a example target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autoexamples = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling unwrap v1.2.1
[INFO] [stderr]    Compiling rustfmt v0.10.0
[INFO] [stderr]    Compiling jni-sys v0.3.0
[INFO] [stderr]    Compiling alloc-no-stdlib v1.2.0
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling lru_time_cache v0.8.1
[INFO] [stderr]    Compiling crossbeam-utils v0.6.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling walkdir v2.0.1
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling brotli-decompressor v1.3.0
[INFO] [stderr]    Compiling extprim v1.7.0
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling openssl v0.10.24
[INFO] [stderr]    Compiling strings v0.1.1
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling crossbeam-channel v0.3.7
[INFO] [stderr]    Compiling tokio-executor v0.1.8
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/context.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crossbeam_utils::Backoff;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/array.rs:23:23
[INFO] [stderr]    |
[INFO] [stderr] 23 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stderr]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/list.rs:10:23
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stderr]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/zero.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crossbeam_utils::Backoff;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/select.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crossbeam_utils::Backoff;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/utils.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crossbeam_utils::Backoff;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `crossbeam-channel`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "cdfdd1051d260f2df771eb66fff8ff2aa70b0fcaf7aef3a1a2e2dbc673778b9c"`
[INFO] running `"docker" "rm" "-f" "cdfdd1051d260f2df771eb66fff8ff2aa70b0fcaf7aef3a1a2e2dbc673778b9c"`
[INFO] [stdout] cdfdd1051d260f2df771eb66fff8ff2aa70b0fcaf7aef3a1a2e2dbc673778b9c