[INFO] fetching crate hanbun 0.4.1...
[INFO] checking hanbun-0.4.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate hanbun 0.4.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate hanbun 0.4.1 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 hanbun 0.4.1
[INFO] finished tweaking crates.io crate hanbun 0.4.1
[INFO] tweaked toml for crates.io crate hanbun 0.4.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate hanbun 0.4.1 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miniz_oxide v0.4.3
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 7b7bf4da19c118dec862614ab640036fef2ce8813113a573937ef8cd59d7b9f8
[INFO] running `Command { std: "docker" "start" "-a" "7b7bf4da19c118dec862614ab640036fef2ce8813113a573937ef8cd59d7b9f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b7bf4da19c118dec862614ab640036fef2ce8813113a573937ef8cd59d7b9f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b7bf4da19c118dec862614ab640036fef2ce8813113a573937ef8cd59d7b9f8", kill_on_drop: false }`
[INFO] [stdout] 7b7bf4da19c118dec862614ab640036fef2ce8813113a573937ef8cd59d7b9f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b08b2e6444342a4d3d0c56c281492a2750c29859bf95dd76e2091337fa15b9d3
[INFO] running `Command { std: "docker" "start" "-a" "b08b2e6444342a4d3d0c56c281492a2750c29859bf95dd76e2091337fa15b9d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
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[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-integer v0.1.44
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[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/katakana.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hanbun::{self, Color};
[INFO] [stdout]   |              ^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/image.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | use hanbun::{self, Color};
[INFO] [stdout]   |              ^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/snake.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hanbun::{self, Color};
[INFO] [stdout]   |              ^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/calculator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hanbun;
[INFO] [stdout]   |     ^^^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `meval` is imported redundantly
[INFO] [stdout]  --> examples/calculator.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use meval;
[INFO] [stdout]   |     ^^^^^ the item `meval` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/kanji.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hanbun::{self, Color};
[INFO] [stdout]   |              ^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hanbun` is imported redundantly
[INFO] [stdout]  --> examples/hiragana.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hanbun::{self, Color};
[INFO] [stdout]   |              ^^^^ the item `hanbun` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `digit` is never read
[INFO] [stdout]   --> examples/calculator.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Button {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 16 |     digit: usize,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Button` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.70s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v1.2.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "b08b2e6444342a4d3d0c56c281492a2750c29859bf95dd76e2091337fa15b9d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b08b2e6444342a4d3d0c56c281492a2750c29859bf95dd76e2091337fa15b9d3", kill_on_drop: false }`
[INFO] [stdout] b08b2e6444342a4d3d0c56c281492a2750c29859bf95dd76e2091337fa15b9d3