[INFO] cloning repository https://github.com/ebobrow/ream
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ebobrow/ream" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Febobrow%2Fream", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Febobrow%2Fream'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84cb83683a270d94b3dd67aa979f0f4c9ddf2029
[INFO] checking ebobrow/ream against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Febobrow%2Fream" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/ebobrow/ream
[INFO] finished tweaking git repo https://github.com/ebobrow/ream
[INFO] tweaked toml for git repo https://github.com/ebobrow/ream written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ebobrow/ream on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ebobrow/ream already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking ebobrow/ream against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Febobrow%2Fream" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/ebobrow/ream
[INFO] finished tweaking git repo https://github.com/ebobrow/ream
[INFO] tweaked toml for git repo https://github.com/ebobrow/ream written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ebobrow/ream on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ebobrow/ream already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sparsevec v0.2.2
[INFO] [stderr]   Downloaded lrtable v0.13.10
[INFO] [stderr]   Downloaded packedvec v1.2.5
[INFO] [stderr]   Downloaded lrpar v0.13.10
[INFO] [stderr]   Downloaded cactus v1.0.7
[INFO] [stderr]   Downloaded vob v3.0.4
[INFO] [stderr]   Downloaded cfgrammar v0.13.10
[INFO] [stderr]   Downloaded lrlex v0.13.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a136e3273c7e4a944e37e9aabb25c806f60dcac28563974f59e05442bc8974f2
[INFO] running `Command { std: "docker" "start" "-a" "a136e3273c7e4a944e37e9aabb25c806f60dcac28563974f59e05442bc8974f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a136e3273c7e4a944e37e9aabb25c806f60dcac28563974f59e05442bc8974f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a136e3273c7e4a944e37e9aabb25c806f60dcac28563974f59e05442bc8974f2", kill_on_drop: false }`
[INFO] [stdout] a136e3273c7e4a944e37e9aabb25c806f60dcac28563974f59e05442bc8974f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f77a5b2a41f073c2b4aa5bc11dbd92ff76514674fa54f992b33645397cfb44bc
[INFO] running `Command { std: "docker" "start" "-a" "f77a5b2a41f073c2b4aa5bc11dbd92ff76514674fa54f992b33645397cfb44bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling rustversion v1.0.20
[INFO] [stderr]    Compiling num_threads v0.1.7
[INFO] [stderr]    Compiling time-core v0.1.4
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling deranged v0.4.0
[INFO] [stderr]    Compiling anyhow v1.0.98
[INFO] [stderr]    Compiling hashbrown v0.15.3
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling cactus v1.0.7
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking filetime v0.2.25
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling indexmap v2.9.0
[INFO] [stderr]    Compiling time v0.3.41
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]    Compiling vergen v8.3.2
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling lrpar v0.13.10
[INFO] [stderr]    Compiling lrlex v0.13.10
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking vob v3.0.4
[INFO] [stderr]     Checking packedvec v1.2.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking sparsevec v0.2.2
[INFO] [stderr]     Checking cfgrammar v0.13.10
[INFO] [stderr]     Checking lrtable v0.13.10
[INFO] [stderr]    Compiling ream v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `save` is never read
[INFO] [stdout]  --> src/message.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Mailbox {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     msgs: Vec<DataObject>,
[INFO] [stdout] 8 |     save: Option<usize>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Mailbox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `MBuf` is never used
[INFO] [stdout]   --> src/message.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type MBuf = Arc<DataObject>;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/scheduler.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Scheduler {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 20 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Scheduler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Kill` is never constructed
[INFO] [stdout]   --> src/vm.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub enum VMCmd {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 18 |     Kill,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `save` is never read
[INFO] [stdout]  --> src/message.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Mailbox {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     msgs: Vec<DataObject>,
[INFO] [stdout] 8 |     save: Option<usize>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Mailbox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `MBuf` is never used
[INFO] [stdout]   --> src/message.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type MBuf = Arc<DataObject>;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/scheduler.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Scheduler {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 20 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Scheduler` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Kill` is never constructed
[INFO] [stdout]   --> src/vm.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub enum VMCmd {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 18 |     Kill,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.72s
[INFO] running `Command { std: "docker" "inspect" "f77a5b2a41f073c2b4aa5bc11dbd92ff76514674fa54f992b33645397cfb44bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f77a5b2a41f073c2b4aa5bc11dbd92ff76514674fa54f992b33645397cfb44bc", kill_on_drop: false }`
[INFO] [stdout] f77a5b2a41f073c2b4aa5bc11dbd92ff76514674fa54f992b33645397cfb44bc