[INFO] fetching crate cueball-tcp-stream-connection 0.3.1...
[INFO] checking cueball-tcp-stream-connection-0.3.1 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate cueball-tcp-stream-connection 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cueball-tcp-stream-connection 0.3.1 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cueball-tcp-stream-connection 0.3.1
[INFO] finished tweaking crates.io crate cueball-tcp-stream-connection 0.3.1
[INFO] tweaked toml for crates.io crate cueball-tcp-stream-connection 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cueball v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6842c3c21279005eeac9672057549acca6dfdd31dfcd4ee4fb02230596ca8f1
[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" "e6842c3c21279005eeac9672057549acca6dfdd31dfcd4ee4fb02230596ca8f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6842c3c21279005eeac9672057549acca6dfdd31dfcd4ee4fb02230596ca8f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6842c3c21279005eeac9672057549acca6dfdd31dfcd4ee4fb02230596ca8f1", kill_on_drop: false }`
[INFO] [stdout] e6842c3c21279005eeac9672057549acca6dfdd31dfcd4ee4fb02230596ca8f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cde05baf0960a09568ed3d93896cbc8452666df7b210437d0def250170c07290
[INFO] running `Command { std: "docker" "start" "-a" "cde05baf0960a09568ed3d93896cbc8452666df7b210437d0def250170c07290", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[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]     Checking log v0.3.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]     Checking slog-stdlog v3.0.5
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking backoff v0.1.6
[INFO] [stderr]     Checking timer v0.2.0
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]     Checking cueball v0.3.5
[INFO] [stderr]     Checking cueball-tcp-stream-connection v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.16s
[INFO] running `Command { std: "docker" "inspect" "cde05baf0960a09568ed3d93896cbc8452666df7b210437d0def250170c07290", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cde05baf0960a09568ed3d93896cbc8452666df7b210437d0def250170c07290", kill_on_drop: false }`
[INFO] [stdout] cde05baf0960a09568ed3d93896cbc8452666df7b210437d0def250170c07290