[INFO] fetching crate tokenizer 0.1.2...
[INFO] checking tokenizer-0.1.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tokenizer 0.1.2 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate tokenizer 0.1.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokenizer 0.1.2
[INFO] finished tweaking crates.io crate tokenizer 0.1.2
[INFO] tweaked toml for crates.io crate tokenizer 0.1.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages
[INFO] [stderr]       Adding num v0.2.1 (latest: v0.4.1)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding num-complex v0.2.4 (latest: v0.4.5)
[INFO] [stderr]       Adding num-rational v0.2.4 (latest: v0.4.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded permutator v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a625d3f7f5fc57cf847494216153e5fe3f4fec4f588ca9fdf302646afe3d4f54
[INFO] running `Command { std: "docker" "start" "-a" "a625d3f7f5fc57cf847494216153e5fe3f4fec4f588ca9fdf302646afe3d4f54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a625d3f7f5fc57cf847494216153e5fe3f4fec4f588ca9fdf302646afe3d4f54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a625d3f7f5fc57cf847494216153e5fe3f4fec4f588ca9fdf302646afe3d4f54", kill_on_drop: false }`
[INFO] [stdout] a625d3f7f5fc57cf847494216153e5fe3f4fec4f588ca9fdf302646afe3d4f54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96b11378f1de0a22f946aa8c23d0a7f849ebd1c1ea7a992fda5e933bedf30a5e
[INFO] running `Command { std: "docker" "start" "-a" "96b11378f1de0a22f946aa8c23d0a7f849ebd1c1ea7a992fda5e933bedf30a5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking tokenizer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `level` and `into_vec` are never used
[INFO] [stdout]   --> src/tokenizer/mod.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait TreeOp<T> {
[INFO] [stdout]    |           ------ methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn level(&self) -> usize;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn into_vec(self) -> Vec<T>;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking permutator v0.4.3
[INFO] [stdout] warning: methods `level` and `into_vec` are never used
[INFO] [stdout]   --> src/tokenizer/mod.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait TreeOp<T> {
[INFO] [stdout]    |           ------ methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn level(&self) -> usize;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn into_vec(self) -> Vec<T>;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]   --> src/tokenizer/tests.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Vec::<&str>::from(&*TreeNode::root().read().unwrap());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let _ = Vec::<&str>::from(&*TreeNode::root().read().unwrap());
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `Command { std: "docker" "inspect" "96b11378f1de0a22f946aa8c23d0a7f849ebd1c1ea7a992fda5e933bedf30a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96b11378f1de0a22f946aa8c23d0a7f849ebd1c1ea7a992fda5e933bedf30a5e", kill_on_drop: false }`
[INFO] [stdout] 96b11378f1de0a22f946aa8c23d0a7f849ebd1c1ea7a992fda5e933bedf30a5e