[INFO] cloning repository https://github.com/must-sh/must
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/must-sh/must" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmust-sh%2Fmust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmust-sh%2Fmust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ecaa00a2f8c365e15fd51247f85338f603a6638
[INFO] checking must-sh/must against 1af98b7cdf86932b76182a387f52f1be6f0c1be0 for pr-159706
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmust-sh%2Fmust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/must-sh/must
[INFO] finished tweaking git repo https://github.com/must-sh/must
[INFO] tweaked toml for git repo https://github.com/must-sh/must written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/must-sh/must on toolchain 1af98b7cdf86932b76182a387f52f1be6f0c1be0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1af98b7cdf86932b76182a387f52f1be6f0c1be0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/must-sh/must already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1af98b7cdf86932b76182a387f52f1be6f0c1be0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398
[INFO] running `Command { std: "docker" "start" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398" "/opt/rustwide/cargo-home/bin/cargo" "+1af98b7cdf86932b76182a387f52f1be6f0c1be0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398" "/opt/rustwide/cargo-home/bin/cargo" "+1af98b7cdf86932b76182a387f52f1be6f0c1be0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling must v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cranelift-module v0.132.0
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[INFO] [stdout] warning: associated function `unknown_type` is never used
[INFO] [stdout]    --> src/tp.rs:202:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl Diagnostic {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 202 |     pub fn unknown_type(db: &dyn Database, span: Span, name: String, source: Source) -> 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: method `new_unbound_var` is never used
[INFO] [stdout]    --> src/tp.rs:326:12
[INFO] [stdout]     |
[INFO] [stdout] 309 | impl<'a> Env<'a> {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 326 |     pub fn new_unbound_var(&mut self) -> TypeId<'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `unknown_type` is never used
[INFO] [stdout]    --> src/tp.rs:202:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl Diagnostic {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 202 |     pub fn unknown_type(db: &dyn Database, span: Span, name: String, source: Source) -> 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: method `new_unbound_var` is never used
[INFO] [stdout]    --> src/tp.rs:326:12
[INFO] [stdout]     |
[INFO] [stdout] 309 | impl<'a> Env<'a> {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 326 |     pub fn new_unbound_var(&mut self) -> TypeId<'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 06s
[INFO] running `Command { std: "docker" "inspect" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398", kill_on_drop: false }`
[INFO] [stdout] 76a5f0b486ef1239a894ae06d1943425c1558c02bfa34cb0e19aa296adeeb398