[INFO] fetching crate stocker 0.2.0...
[INFO] testing stocker-0.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate stocker 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate stocker 0.2.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking crates.io crate stocker 0.2.0
[INFO] finished tweaking crates.io crate stocker 0.2.0
[INFO] tweaked toml for crates.io crate stocker 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate stocker 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65aec48f3e8a692498a98c0c81150d44840e188f23e39f8bd1f06453b0c35018
[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" "65aec48f3e8a692498a98c0c81150d44840e188f23e39f8bd1f06453b0c35018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65aec48f3e8a692498a98c0c81150d44840e188f23e39f8bd1f06453b0c35018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65aec48f3e8a692498a98c0c81150d44840e188f23e39f8bd1f06453b0c35018", kill_on_drop: false }`
[INFO] [stdout] 65aec48f3e8a692498a98c0c81150d44840e188f23e39f8bd1f06453b0c35018
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17b10df4126b328e1bb2ff62c8845d1d7128804c0488a1253c041bb22c7c2fca
[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" "17b10df4126b328e1bb2ff62c8845d1d7128804c0488a1253c041bb22c7c2fca", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling hashbrown v0.9.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling arc-swap v0.4.7
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling protobuf v2.17.0
[INFO] [stderr]    Compiling async-task v4.0.1
[INFO] [stderr]    Compiling argh_shared v0.1.1
[INFO] [stderr]    Compiling trilean v1.0.1
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling tracing-core v0.1.16
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]    Compiling bimap v0.4.0
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling http v0.2.1
[INFO] [stderr]    Compiling input_buffer v0.3.1
[INFO] [stderr]    Compiling async-mutex v1.3.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling bit-set v0.2.0
[INFO] [stderr]    Compiling async-channel v1.4.2
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling futures-lite v1.7.0
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling itertools-num v0.1.3
[INFO] [stderr]    Compiling tracing v0.1.19
[INFO] [stderr]    Compiling blocking v0.4.7
[INFO] [stderr]    Compiling sha-1 v0.9.1
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling net2 v0.2.35
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling socket2 v0.3.15
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling polling v1.1.0
[INFO] [stderr]    Compiling mio v0.7.0
[INFO] [stderr]    Compiling nb-connect v1.0.0
[INFO] [stderr]    Compiling signal-hook-registry v1.2.1
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling termios v0.3.2
[INFO] [stderr]    Compiling clicolors-control v1.0.1
[INFO] [stderr]    Compiling slice-deque v0.1.16
[INFO] [stderr]    Compiling async-executor v1.3.0
[INFO] [stderr]    Compiling blocking v1.0.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling async-io v1.1.2
[INFO] [stderr]    Compiling signal-hook v0.1.16
[INFO] [stderr]    Compiling console v0.9.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling reactive-rs v0.1.1
[INFO] [stderr]    Compiling libmath v0.2.1
[INFO] [stderr]    Compiling async-global-executor v1.1.1
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling better-panic v0.2.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling async-std v1.6.4
[INFO] [stderr]    Compiling ta v0.1.5
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling gcollections v1.4.0
[INFO] [stderr]    Compiling intervallum v1.3.0
[INFO] [stderr]    Compiling tungstenite v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling snafu-derive v0.6.9
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling argh_derive v0.1.1
[INFO] [stderr]    Compiling smol-potat-derive v0.1.0
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling derive_more v0.99.10
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]    Compiling derive-new v0.5.8
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr] error: could not compile `async-std`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name async_std --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/async-std-1.6.4/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="async-global-executor"' --cfg 'feature="async-io"' --cfg 'feature="async-mutex"' --cfg 'feature="async-task"' --cfg 'feature="blocking"' --cfg 'feature="crossbeam-utils"' --cfg 'feature="default"' --cfg 'feature="futures-channel"' --cfg 'feature="futures-core"' --cfg 'feature="futures-io"' --cfg 'feature="futures-lite"' --cfg 'feature="gloo-timers"' --cfg 'feature="kv-log-macro"' --cfg 'feature="log"' --cfg 'feature="memchr"' --cfg 'feature="num_cpus"' --cfg 'feature="once_cell"' --cfg 'feature="pin-project-lite"' --cfg 'feature="pin-utils"' --cfg 'feature="slab"' --cfg 'feature="std"' --cfg 'feature="unstable"' --cfg 'feature="wasm-bindgen-futures"' -C metadata=db99e374fc5c9802 -C extra-filename=-db99e374fc5c9802 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern async_global_executor=/opt/rustwide/target/debug/deps/libasync_global_executor-3d10df8badcafd78.rmeta --extern async_io=/opt/rustwide/target/debug/deps/libasync_io-aa92189baed7ff8e.rmeta --extern async_mutex=/opt/rustwide/target/debug/deps/libasync_mutex-246a16f5621e135c.rmeta --extern async_task=/opt/rustwide/target/debug/deps/libasync_task-096052e1dbfd0b53.rmeta --extern blocking=/opt/rustwide/target/debug/deps/libblocking-02b803594401f579.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-ff13728372c662eb.rmeta --extern futures_core=/opt/rustwide/target/debug/deps/libfutures_core-81f3bfe52e38863d.rmeta --extern futures_io=/opt/rustwide/target/debug/deps/libfutures_io-3229a1b93cb26564.rmeta --extern futures_lite=/opt/rustwide/target/debug/deps/libfutures_lite-bd59121bac9df300.rmeta --extern kv_log_macro=/opt/rustwide/target/debug/deps/libkv_log_macro-a9ddcf206ea66d2d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-574ec1b45a6b839c.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-68751ffea57ec29e.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-7f8b44ddda62669a.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-debe3179146a0b19.rmeta --extern pin_project_lite=/opt/rustwide/target/debug/deps/libpin_project_lite-992c3165e37b3b8d.rmeta --extern pin_utils=/opt/rustwide/target/debug/deps/libpin_utils-1b5011892cb37eb5.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-65742487a18009d6.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "17b10df4126b328e1bb2ff62c8845d1d7128804c0488a1253c041bb22c7c2fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17b10df4126b328e1bb2ff62c8845d1d7128804c0488a1253c041bb22c7c2fca", kill_on_drop: false }`
[INFO] [stdout] 17b10df4126b328e1bb2ff62c8845d1d7128804c0488a1253c041bb22c7c2fca