[INFO] fetching crate tower-vm 0.3.0...
[INFO] building tower-vm-0.3.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate tower-vm 0.3.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate tower-vm 0.3.0
[INFO] finished tweaking crates.io crate tower-vm 0.3.0
[INFO] tweaked toml for crates.io crate tower-vm 0.3.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tower-vm 0.3.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8113cc14725f2342cdd727236ab0edae3d3c86a844dda9e54552f0630c72262e
[INFO] running `Command { std: "docker" "start" "-a" "8113cc14725f2342cdd727236ab0edae3d3c86a844dda9e54552f0630c72262e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8113cc14725f2342cdd727236ab0edae3d3c86a844dda9e54552f0630c72262e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8113cc14725f2342cdd727236ab0edae3d3c86a844dda9e54552f0630c72262e", kill_on_drop: false }`
[INFO] [stdout] 8113cc14725f2342cdd727236ab0edae3d3c86a844dda9e54552f0630c72262e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b066973fd4f0a6c5a8a51ed54f019180aebfe763d29bad5f59d493974b3e262
[INFO] running `Command { std: "docker" "start" "-a" "2b066973fd4f0a6c5a8a51ed54f019180aebfe763d29bad5f59d493974b3e262", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower-vm v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `bytecode`
[INFO] [stdout]   --> src/interpreter/machine.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 | macro_rules! bytecode {
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero` is never used
[INFO] [stdout]    --> src/interpreter/machine.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout]  60 | impl Machine {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn zero(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "2b066973fd4f0a6c5a8a51ed54f019180aebfe763d29bad5f59d493974b3e262", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b066973fd4f0a6c5a8a51ed54f019180aebfe763d29bad5f59d493974b3e262", kill_on_drop: false }`
[INFO] [stdout] 2b066973fd4f0a6c5a8a51ed54f019180aebfe763d29bad5f59d493974b3e262
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d75d5f2463f65e3486b42fa0f7bad7fc48aa1f22a734363c8d3d190b4552408a
[INFO] running `Command { std: "docker" "start" "-a" "d75d5f2463f65e3486b42fa0f7bad7fc48aa1f22a734363c8d3d190b4552408a", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower-vm v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `bytecode`
[INFO] [stdout]   --> src/interpreter/machine.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 | macro_rules! bytecode {
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `zero` is never used
[INFO] [stdout]    --> src/interpreter/machine.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout]  60 | impl Machine {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn zero(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `start` is never read
[INFO] [stdout]    --> src/interpreter/machine.rs:451:17
[INFO] [stdout]     |
[INFO] [stdout] 451 |         let mut start = vec![];
[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 `test` profile [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "d75d5f2463f65e3486b42fa0f7bad7fc48aa1f22a734363c8d3d190b4552408a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d75d5f2463f65e3486b42fa0f7bad7fc48aa1f22a734363c8d3d190b4552408a", kill_on_drop: false }`
[INFO] [stdout] d75d5f2463f65e3486b42fa0f7bad7fc48aa1f22a734363c8d3d190b4552408a