[INFO] fetching crate tower-vm 0.3.0...
[INFO] building tower-vm-0.3.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate tower-vm 0.3.0 into /workspace/builds/worker-2-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-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tower-vm 0.3.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f8605808aa6274516944d52ab78dbff2d244c63dc54130be6a37c87aeb1a168
[INFO] running `Command { std: "docker" "start" "-a" "4f8605808aa6274516944d52ab78dbff2d244c63dc54130be6a37c87aeb1a168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f8605808aa6274516944d52ab78dbff2d244c63dc54130be6a37c87aeb1a168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f8605808aa6274516944d52ab78dbff2d244c63dc54130be6a37c87aeb1a168", kill_on_drop: false }`
[INFO] [stdout] 4f8605808aa6274516944d52ab78dbff2d244c63dc54130be6a37c87aeb1a168
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c85da9337d9b3a31c950c70d9e5f1a60a9fdfd1bf07fbfb87483867649c00ab8
[INFO] running `Command { std: "docker" "start" "-a" "c85da9337d9b3a31c950c70d9e5f1a60a9fdfd1bf07fbfb87483867649c00ab8", 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 0.53s
[INFO] running `Command { std: "docker" "inspect" "c85da9337d9b3a31c950c70d9e5f1a60a9fdfd1bf07fbfb87483867649c00ab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c85da9337d9b3a31c950c70d9e5f1a60a9fdfd1bf07fbfb87483867649c00ab8", kill_on_drop: false }`
[INFO] [stdout] c85da9337d9b3a31c950c70d9e5f1a60a9fdfd1bf07fbfb87483867649c00ab8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 313cd623f7c931a06ebaa84d6170ad19e546f823d36c562e380bdce03bcb3cae
[INFO] running `Command { std: "docker" "start" "-a" "313cd623f7c931a06ebaa84d6170ad19e546f823d36c562e380bdce03bcb3cae", kill_on_drop: false }`
[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] [stderr]    Compiling tower-vm v0.3.0 (/opt/rustwide/workdir)
[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 1.11s
[INFO] running `Command { std: "docker" "inspect" "313cd623f7c931a06ebaa84d6170ad19e546f823d36c562e380bdce03bcb3cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "313cd623f7c931a06ebaa84d6170ad19e546f823d36c562e380bdce03bcb3cae", kill_on_drop: false }`
[INFO] [stdout] 313cd623f7c931a06ebaa84d6170ad19e546f823d36c562e380bdce03bcb3cae