[INFO] cloning repository https://github.com/spica314/neco3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/spica314/neco3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspica314%2Fneco3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspica314%2Fneco3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c9c355523de9374b335ba05da5e1200ffca2355
[INFO] checking spica314/neco3 against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspica314%2Fneco3" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/spica314/neco3 on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/spica314/neco3
[INFO] finished tweaking git repo https://github.com/spica314/neco3
[INFO] tweaked toml for git repo https://github.com/spica314/neco3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/spica314/neco3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 609421598faedf6803e7580dd7208781609dd404e764b9c37d9f95c9f718c5c6
[INFO] running `Command { std: "docker" "start" "-a" "609421598faedf6803e7580dd7208781609dd404e764b9c37d9f95c9f718c5c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "609421598faedf6803e7580dd7208781609dd404e764b9c37d9f95c9f718c5c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "609421598faedf6803e7580dd7208781609dd404e764b9c37d9f95c9f718c5c6", kill_on_drop: false }`
[INFO] [stdout] 609421598faedf6803e7580dd7208781609dd404e764b9c37d9f95c9f718c5c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c71f47bdba65b2efec21706a3b6496d54ef31f2b52f7e5fc92f36c442ad1f606
[INFO] running `Command { std: "docker" "start" "-a" "c71f47bdba65b2efec21706a3b6496d54ef31f2b52f7e5fc92f36c442ad1f606", kill_on_drop: false }`
[INFO] [stderr]     Checking neco-table v0.1.0 (/opt/rustwide/workdir/src/neco-table)
[INFO] [stderr]     Checking neco v0.1.0 (/opt/rustwide/workdir/src/neco)
[INFO] [stderr]     Checking neco-types-and-values v0.1.0 (/opt/rustwide/workdir/src/neco-types-and-values)
[INFO] [stderr]     Checking neco-ir v0.1.0 (/opt/rustwide/workdir/src/neco-ir)
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/neco-types-and-values/src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/neco-types-and-values/src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking neco-syn v0.1.0 (/opt/rustwide/workdir/src/neco-syn)
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/neco-types-and-values/src/bit_vector.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 33 |         self.len()
[INFO] [stdout]    |         ---------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/neco-types-and-values/src/bit_vector.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 33 |         self.len()
[INFO] [stdout]    |         ---------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "c71f47bdba65b2efec21706a3b6496d54ef31f2b52f7e5fc92f36c442ad1f606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c71f47bdba65b2efec21706a3b6496d54ef31f2b52f7e5fc92f36c442ad1f606", kill_on_drop: false }`
[INFO] [stdout] c71f47bdba65b2efec21706a3b6496d54ef31f2b52f7e5fc92f36c442ad1f606