[INFO] cloning repository https://github.com/HenrySwanson/rust-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HenrySwanson/rust-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b5b3ce37d943f932b97ab7d3b8bc26153584c5d
[INFO] checking HenrySwanson/rust-lox against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHenrySwanson%2Frust-lox" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HenrySwanson/rust-lox on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HenrySwanson/rust-lox
[INFO] finished tweaking git repo https://github.com/HenrySwanson/rust-lox
[INFO] tweaked toml for git repo https://github.com/HenrySwanson/rust-lox written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/HenrySwanson/rust-lox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62099f3022a20f820b7c18af8edc1d1ab7efc544194c05d04047dac0bf51a23d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "62099f3022a20f820b7c18af8edc1d1ab7efc544194c05d04047dac0bf51a23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62099f3022a20f820b7c18af8edc1d1ab7efc544194c05d04047dac0bf51a23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62099f3022a20f820b7c18af8edc1d1ab7efc544194c05d04047dac0bf51a23d", kill_on_drop: false }`
[INFO] [stdout] 62099f3022a20f820b7c18af8edc1d1ab7efc544194c05d04047dac0bf51a23d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ea3c6f5d4a9b7f1214255ac73326691f8834e3ec03b3edf64ca81c924401cb3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2ea3c6f5d4a9b7f1214255ac73326691f8834e3ec03b3edf64ca81c924401cb3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.20
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]     Checking rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `disassemble`
[INFO] [stdout]    --> src/bytecode/chunk.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn disassemble(&self, name: &str) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `disassemble_at`
[INFO] [stdout]    --> src/bytecode/chunk.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn disassemble_at(&self, offset: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/bytecode/string_interning.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn insert<K>(&mut self, key: K)
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/bytecode/string_interning.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `disassemble`
[INFO] [stdout]    --> src/bytecode/chunk.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn disassemble(&self, name: &str) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `disassemble_at`
[INFO] [stdout]    --> src/bytecode/chunk.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn disassemble_at(&self, offset: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.56s
[INFO] running `Command { std: "docker" "inspect" "2ea3c6f5d4a9b7f1214255ac73326691f8834e3ec03b3edf64ca81c924401cb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ea3c6f5d4a9b7f1214255ac73326691f8834e3ec03b3edf64ca81c924401cb3", kill_on_drop: false }`
[INFO] [stdout] 2ea3c6f5d4a9b7f1214255ac73326691f8834e3ec03b3edf64ca81c924401cb3