[INFO] cloning repository https://github.com/nyu-latency-labs/timer-example [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nyu-latency-labs/timer-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnyu-latency-labs%2Ftimer-example", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnyu-latency-labs%2Ftimer-example'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5d564d5d64a317aaecca6ac1a39d3aeeaf712539 [INFO] testing nyu-latency-labs/timer-example against 1.49.0 for beta-1.50-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnyu-latency-labs%2Ftimer-example" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/nyu-latency-labs/timer-example 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] started tweaking git repo https://github.com/nyu-latency-labs/timer-example [INFO] finished tweaking git repo https://github.com/nyu-latency-labs/timer-example [INFO] tweaked toml for git repo https://github.com/nyu-latency-labs/timer-example written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/nyu-latency-labs/timer-example 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] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] [stderr] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] e11d2810bb4562f9c134e84325749157a79bf42aaaaff139b71aa824b797c53a [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" "e11d2810bb4562f9c134e84325749157a79bf42aaaaff139b71aa824b797c53a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e11d2810bb4562f9c134e84325749157a79bf42aaaaff139b71aa824b797c53a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e11d2810bb4562f9c134e84325749157a79bf42aaaaff139b71aa824b797c53a", kill_on_drop: false }` [INFO] [stdout] e11d2810bb4562f9c134e84325749157a79bf42aaaaff139b71aa824b797c53a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] cbbee984209b1805144d4436498cc8126c988f44805c7c9ec2c22227e1e76eb2 [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" "cbbee984209b1805144d4436498cc8126c988f44805c7c9ec2c22227e1e76eb2", kill_on_drop: false }` [INFO] [stderr] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] [stderr] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] [stderr] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] [stderr] warning: two git dependencies found for `https://github.com/nyu-latency-labs/tarpc.git` where one uses `branch = "master"` and the other doesn't; this will break in a future version of Cargo, so please ensure the dependency forms are consistent [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Compiling cfg-if v0.1.9 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Compiling futures v0.1.28 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling proc-macro2 v1.0.1 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling smallvec v0.6.10 [INFO] [stderr] Compiling getrandom v0.1.11 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling ppv-lite86 v0.2.5 [INFO] [stderr] Compiling stable_deref_trait v1.1.1 [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Compiling proc-macro-nested v0.1.3 [INFO] [stderr] Compiling arrayvec v0.4.11 [INFO] [stderr] Compiling futures-core-preview v0.3.0-alpha.18 [INFO] [stderr] Compiling serde v1.0.99 [INFO] [stderr] Compiling nodrop v0.1.13 [INFO] [stderr] Compiling pin-utils v0.1.0-alpha.4 [INFO] [stderr] Compiling futures-io-preview v0.3.0-alpha.18 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Compiling lock_api v0.3.1 [INFO] [stderr] Compiling crossbeam-utils v0.6.6 [INFO] [stderr] Compiling owning_ref v0.4.0 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Compiling futures-sink-preview v0.3.0-alpha.18 [INFO] [stderr] Compiling itertools v0.8.0 [INFO] [stderr] Compiling humantime v1.2.0 [INFO] [stderr] Compiling textwrap v0.11.0 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling c2-chacha v0.2.2 [INFO] [stderr] Compiling futures-channel-preview v0.3.0-alpha.18 [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 lock_api v0.1.5 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Compiling memoffset v0.5.1 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling bincode v1.1.4 [INFO] [stderr] Compiling crossbeam-queue v0.1.2 [INFO] [stderr] Compiling tokio-executor v0.1.8 [INFO] [stderr] Compiling tokio-sync v0.1.6 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Compiling tokio-timer v0.2.11 [INFO] [stderr] Compiling tokio-current-thread v0.1.6 [INFO] [stderr] Compiling crossbeam-epoch v0.7.2 [INFO] [stderr] Compiling num_cpus v1.10.1 [INFO] [stderr] Compiling iovec v0.1.2 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Compiling net2 v0.2.33 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling atty v0.2.13 [INFO] [stderr] Compiling time v0.1.42 [INFO] [stderr] Compiling crossbeam-deque v0.7.1 [INFO] [stderr] Compiling bytes v0.4.12 [INFO] [stderr] Compiling clap v2.33.0 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling mio v0.6.19 [INFO] [stderr] Compiling rand_chacha v0.2.1 [INFO] [stderr] Compiling tokio-io v0.1.12 [INFO] [stderr] Compiling once_cell v0.2.7 [INFO] [stderr] Compiling rand v0.7.0 [INFO] [stderr] Compiling tokio-codec v0.1.1 [INFO] [stderr] Compiling mio-uds v0.6.7 [INFO] [stderr] Compiling tokio-threadpool v0.1.15 [INFO] [stderr] Compiling parking_lot v0.7.1 [INFO] [stderr] Compiling tokio-fs v0.1.6 [INFO] [stderr] Compiling tokio-reactor v0.1.9 [INFO] [stderr] Compiling tokio-uds v0.2.5 [INFO] [stderr] Compiling tokio-udp v0.1.3 [INFO] [stderr] Compiling tokio-tcp v0.1.3 [INFO] [stderr] Compiling tokio v0.1.22 [INFO] [stderr] Compiling proc-macro-hack v0.5.9 [INFO] [stderr] Compiling serde_derive v1.0.99 [INFO] [stderr] Compiling futures-join-macro-preview v0.3.0-alpha.18 [INFO] [stderr] Compiling futures-select-macro-preview v0.3.0-alpha.18 [INFO] [stderr] Compiling tarpc-plugins v0.5.1 (https://github.com/nyu-latency-labs/tarpc.git#537446a5) [INFO] [stderr] Compiling futures-util-preview v0.3.0-alpha.18 [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-util-preview-0.3.0-alpha.18/src/lib.rs:4:38 [INFO] [stdout] | [INFO] [stdout] 4 | #![cfg_attr(feature = "async-await", feature(async_await))] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `futures-util-preview` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "cbbee984209b1805144d4436498cc8126c988f44805c7c9ec2c22227e1e76eb2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cbbee984209b1805144d4436498cc8126c988f44805c7c9ec2c22227e1e76eb2", kill_on_drop: false }` [INFO] [stdout] cbbee984209b1805144d4436498cc8126c988f44805c7c9ec2c22227e1e76eb2