[INFO] fetching crate alloc-singleton 0.1.0...
[INFO] testing alloc-singleton-0.1.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate alloc-singleton 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate alloc-singleton 0.1.0
[INFO] finished tweaking crates.io crate alloc-singleton 0.1.0
[INFO] tweaked toml for crates.io crate alloc-singleton 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate alloc-singleton 0.1.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding as-slice v0.1.5 (available: v0.2.1)
[INFO] [stderr]       Adding generic-array v0.12.4 (available: v1.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa457a87b3134a31f7ad294dd0a7eace123e125ec0256213127f240c325387e5
[INFO] running `Command { std: "docker" "start" "-a" "fa457a87b3134a31f7ad294dd0a7eace123e125ec0256213127f240c325387e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa457a87b3134a31f7ad294dd0a7eace123e125ec0256213127f240c325387e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa457a87b3134a31f7ad294dd0a7eace123e125ec0256213127f240c325387e5", kill_on_drop: false }`
[INFO] [stdout] fa457a87b3134a31f7ad294dd0a7eace123e125ec0256213127f240c325387e5
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cd784c89c10a42da3a32dd6881ceaf4646c410c72fd907e293f25710a6bd3ea
[INFO] running `Command { std: "docker" "start" "-a" "7cd784c89c10a42da3a32dd6881ceaf4646c410c72fd907e293f25710a6bd3ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling as-slice v0.1.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling owned-singleton-macros v0.1.0
[INFO] [stderr]    Compiling owned-singleton v0.1.0
[INFO] [stderr]    Compiling alloc-singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.86s
[INFO] running `Command { std: "docker" "inspect" "7cd784c89c10a42da3a32dd6881ceaf4646c410c72fd907e293f25710a6bd3ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd784c89c10a42da3a32dd6881ceaf4646c410c72fd907e293f25710a6bd3ea", kill_on_drop: false }`
[INFO] [stdout] 7cd784c89c10a42da3a32dd6881ceaf4646c410c72fd907e293f25710a6bd3ea
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04284e1b8e02d2d5828f9f4af29ed96d443c0e520f36c807b079996e1e777d04
[INFO] running `Command { std: "docker" "start" "-a" "04284e1b8e02d2d5828f9f4af29ed96d443c0e520f36c807b079996e1e777d04", kill_on_drop: false }`
[INFO] [stderr]    Compiling alloc-singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:294:22
[INFO] [stdout]     |
[INFO] [stdout] 294 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:11:9
[INFO] [stdout]     |
[INFO] [stdout]  11 | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: field `0` is never read
[INFO] [stdout]    --> src/stable/pool.rs:331:22
[INFO] [stdout]     |
[INFO] [stdout] 331 |         pub struct A(u32);
[INFO] [stdout]     |                    - ^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alloc-singleton` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "04284e1b8e02d2d5828f9f4af29ed96d443c0e520f36c807b079996e1e777d04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04284e1b8e02d2d5828f9f4af29ed96d443c0e520f36c807b079996e1e777d04", kill_on_drop: false }`
[INFO] [stdout] 04284e1b8e02d2d5828f9f4af29ed96d443c0e520f36c807b079996e1e777d04