[INFO] cloning repository https://github.com/ahouts/mbuffer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ahouts/mbuffer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmbuffer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmbuffer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e198c4cd8762a038dde0af1710f32f20a0986edf
[INFO] testing ahouts/mbuffer against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahouts%2Fmbuffer" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ahouts/mbuffer on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ahouts/mbuffer
[INFO] finished tweaking git repo https://github.com/ahouts/mbuffer
[INFO] tweaked toml for git repo https://github.com/ahouts/mbuffer written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ahouts/mbuffer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", 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] 83286b120cbf0c109ed88742ded55769cdf7cd02211b2d60f422a2bae293687c
[INFO] running `Command { std: "docker" "start" "-a" "83286b120cbf0c109ed88742ded55769cdf7cd02211b2d60f422a2bae293687c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83286b120cbf0c109ed88742ded55769cdf7cd02211b2d60f422a2bae293687c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83286b120cbf0c109ed88742ded55769cdf7cd02211b2d60f422a2bae293687c", kill_on_drop: false }`
[INFO] [stdout] 83286b120cbf0c109ed88742ded55769cdf7cd02211b2d60f422a2bae293687c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58b21b7f99266caa92cfcaf928472ce0c3342bcf67009a62365012f69b6db5d8
[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" "58b21b7f99266caa92cfcaf928472ce0c3342bcf67009a62365012f69b6db5d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling atty v0.2.10
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling mbuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/buff/mod.rs:17:70
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^ help: use `dyn`: `dyn Read + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/buff/mod.rs:17:95
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stdout]    |                                                                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Write + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.86s
[INFO] running `Command { std: "docker" "inspect" "58b21b7f99266caa92cfcaf928472ce0c3342bcf67009a62365012f69b6db5d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58b21b7f99266caa92cfcaf928472ce0c3342bcf67009a62365012f69b6db5d8", kill_on_drop: false }`
[INFO] [stdout] 58b21b7f99266caa92cfcaf928472ce0c3342bcf67009a62365012f69b6db5d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--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] a55c9b9a2b0795809ab9edcf65c21b3ddc1cb19c06194363e8e9cf2581b8fced
[INFO] running `Command { std: "docker" "start" "-a" "a55c9b9a2b0795809ab9edcf65c21b3ddc1cb19c06194363e8e9cf2581b8fced", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mbuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/buff/mod.rs:17:70
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^ help: use `dyn`: `dyn Read + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/buff/mod.rs:17:95
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stdout]    |                                                                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Write + Send`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "a55c9b9a2b0795809ab9edcf65c21b3ddc1cb19c06194363e8e9cf2581b8fced", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a55c9b9a2b0795809ab9edcf65c21b3ddc1cb19c06194363e8e9cf2581b8fced", kill_on_drop: false }`
[INFO] [stdout] a55c9b9a2b0795809ab9edcf65c21b3ddc1cb19c06194363e8e9cf2581b8fced
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", 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] 4113727a93c215b64829300d651cc261267ccfb932aeff5f4f16343d5c09e661
[INFO] running `Command { std: "docker" "start" "-a" "4113727a93c215b64829300d651cc261267ccfb932aeff5f4f16343d5c09e661", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/buff/mod.rs:17:70
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stderr]    |                                                                      ^^^^^^^^^^^ help: use `dyn`: `dyn Read + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/buff/mod.rs:17:95
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(segment_length: usize, buffer_size: usize, mut r: Box<Read + Send>, mut w: Box<Write + Send>) -> Self {
[INFO] [stderr]    |                                                                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn Write + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mbuffer-549414cef6a853f9)
[INFO] running `Command { std: "docker" "inspect" "4113727a93c215b64829300d651cc261267ccfb932aeff5f4f16343d5c09e661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4113727a93c215b64829300d651cc261267ccfb932aeff5f4f16343d5c09e661", kill_on_drop: false }`
[INFO] [stdout] 4113727a93c215b64829300d651cc261267ccfb932aeff5f4f16343d5c09e661