[INFO] fetching crate tree-buf 0.10.0...
[INFO] checking tree-buf-0.10.0 against master#893fadd11a52aa26fc19c67ee1b79f03d6a1bed3 for pr-77153
[INFO] extracting crate tree-buf 0.10.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate tree-buf 0.10.0 on toolchain 893fadd11a52aa26fc19c67ee1b79f03d6a1bed3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tree-buf 0.10.0
[INFO] finished tweaking crates.io crate tree-buf 0.10.0
[INFO] tweaked toml for crates.io crate tree-buf 0.10.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99801f0a864f6c1a65f3fe48936c13f2cb7ad104c7ce7688f3330a6a79249ec5
[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" "99801f0a864f6c1a65f3fe48936c13f2cb7ad104c7ce7688f3330a6a79249ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99801f0a864f6c1a65f3fe48936c13f2cb7ad104c7ce7688f3330a6a79249ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99801f0a864f6c1a65f3fe48936c13f2cb7ad104c7ce7688f3330a6a79249ec5", kill_on_drop: false }`
[INFO] [stdout] 99801f0a864f6c1a65f3fe48936c13f2cb7ad104c7ce7688f3330a6a79249ec5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2008646e6d8969b55e407425cb67ddc8da73d526b23e79ff2e8a8baf2a1c17e2
[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" "2008646e6d8969b55e407425cb67ddc8da73d526b23e79ff2e8a8baf2a1c17e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking firestorm v0.3.0
[INFO] [stderr]     Checking transmute v0.1.1
[INFO] [stderr]     Checking defer v0.1.0
[INFO] [stderr]     Checking gibbon v0.1.3
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking simple-16 v0.2.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking miniz_oxide v0.4.2
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking zigzag v0.1.0
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking rayon-core v1.8.1
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking rayon v1.4.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking coercible_errors v0.1.4
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling tree-buf-macros v0.10.0
[INFO] [stderr]     Checking tree-buf v0.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stdout] warning: unused import: `tree_buf::prelude::*`
[INFO] [stdout]  --> benches/float_list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tree_buf::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
[INFO] running `Command { std: "docker" "inspect" "2008646e6d8969b55e407425cb67ddc8da73d526b23e79ff2e8a8baf2a1c17e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2008646e6d8969b55e407425cb67ddc8da73d526b23e79ff2e8a8baf2a1c17e2", kill_on_drop: false }`
[INFO] [stdout] 2008646e6d8969b55e407425cb67ddc8da73d526b23e79ff2e8a8baf2a1c17e2