[INFO] fetching crate silverfish 0.3.0...
[INFO] testing silverfish-0.3.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate silverfish 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate silverfish 0.3.0
[INFO] finished tweaking crates.io crate silverfish 0.3.0
[INFO] tweaked toml for crates.io crate silverfish 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate silverfish 0.3.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate silverfish 0.3.0 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89b46fdf246860b106acbd4b5ddd1d67628ddf02969f7f355b9cb9b627f0c411
[INFO] running `Command { std: "docker" "start" "-a" "89b46fdf246860b106acbd4b5ddd1d67628ddf02969f7f355b9cb9b627f0c411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89b46fdf246860b106acbd4b5ddd1d67628ddf02969f7f355b9cb9b627f0c411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89b46fdf246860b106acbd4b5ddd1d67628ddf02969f7f355b9cb9b627f0c411", kill_on_drop: false }`
[INFO] [stdout] 89b46fdf246860b106acbd4b5ddd1d67628ddf02969f7f355b9cb9b627f0c411
[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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac20f5543f7b357eb908c3e7bec832fc3e33e505d2934be04136f06154b179a0
[INFO] running `Command { std: "docker" "start" "-a" "ac20f5543f7b357eb908c3e7bec832fc3e33e505d2934be04136f06154b179a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling twox-hash v1.6.3
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling lz4_flex v0.11.5
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling simd_cesu8 v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling fixedbitset v0.5.7
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling lz4-java-wrc v0.2.0
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling dashmap v6.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]    Compiling simdnbt-derive v0.8.0
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling thiserror v2.0.16
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling mca v1.1.0
[INFO] [stderr]    Compiling simdnbt v0.8.0
[INFO] [stderr]    Compiling silverfish v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/region.rs:476:13
[INFO] [stdout]     |
[INFO] [stdout] 476 |             len -= 1;
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.86s
[INFO] running `Command { std: "docker" "inspect" "ac20f5543f7b357eb908c3e7bec832fc3e33e505d2934be04136f06154b179a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac20f5543f7b357eb908c3e7bec832fc3e33e505d2934be04136f06154b179a0", kill_on_drop: false }`
[INFO] [stdout] ac20f5543f7b357eb908c3e7bec832fc3e33e505d2934be04136f06154b179a0
[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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71cf44f49b5ddb296d401cd3a9ed63c0ebe06c025dd4205eac823d2e144bc313
[INFO] running `Command { std: "docker" "start" "-a" "71cf44f49b5ddb296d401cd3a9ed63c0ebe06c025dd4205eac823d2e144bc313", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.141
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling csv-core v0.1.12
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling criterion-plot v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dashmap v6.1.0
[INFO] [stderr]    Compiling csv v1.3.1
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling silverfish v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/region.rs:476:13
[INFO] [stdout]     |
[INFO] [stdout] 476 |             len -= 1;
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.6
[INFO] [stdout] error: couldn't read `src/../tests/full_region.mca`: No such file or directory (os error 2)
[INFO] [stdout]    --> src/region.rs:600:32
[INFO] [stdout]     |
[INFO] [stdout] 600 |     const TEST_REGION: &[u8] = include_bytes!("../tests/full_region.mca");
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read `src/../tests/empty_region.mca`: No such file or directory (os error 2)
[INFO] [stdout]    --> src/region.rs:610:33
[INFO] [stdout]     |
[INFO] [stdout] 610 |     const EMPTY_REGION: &[u8] = include_bytes!("../tests/empty_region.mca");
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/region.rs:476:13
[INFO] [stdout]     |
[INFO] [stdout] 476 |             len -= 1;
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `silverfish` (lib test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "71cf44f49b5ddb296d401cd3a9ed63c0ebe06c025dd4205eac823d2e144bc313", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71cf44f49b5ddb296d401cd3a9ed63c0ebe06c025dd4205eac823d2e144bc313", kill_on_drop: false }`
[INFO] [stdout] 71cf44f49b5ddb296d401cd3a9ed63c0ebe06c025dd4205eac823d2e144bc313