[INFO] cloning repository https://github.com/tonyhb/rc32fast-repro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tonyhb/rc32fast-repro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyhb%2Frc32fast-repro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyhb%2Frc32fast-repro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e0d45bcdeeaf655fb8d0970691e15e30f7b73c8
[INFO] checking tonyhb/rc32fast-repro against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftonyhb%2Frc32fast-repro" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tonyhb/rc32fast-repro 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 git repo https://github.com/tonyhb/rc32fast-repro
[INFO] finished tweaking git repo https://github.com/tonyhb/rc32fast-repro
[INFO] tweaked toml for git repo https://github.com/tonyhb/rc32fast-repro written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tonyhb/rc32fast-repro 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]  Downloading crates ...
[INFO] [stderr]   Downloaded simple-error v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6ade2abdaa0ca4e7144e0986e2b03672ca78822ada971015384089ca7b0892a8
[INFO] running `Command { std: "docker" "start" "-a" "6ade2abdaa0ca4e7144e0986e2b03672ca78822ada971015384089ca7b0892a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ade2abdaa0ca4e7144e0986e2b03672ca78822ada971015384089ca7b0892a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ade2abdaa0ca4e7144e0986e2b03672ca78822ada971015384089ca7b0892a8", kill_on_drop: false }`
[INFO] [stdout] 6ade2abdaa0ca4e7144e0986e2b03672ca78822ada971015384089ca7b0892a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6c151429bb9039efc853642a0e6d399e447b91347dc0241cb8731139d736c5ee
[INFO] running `Command { std: "docker" "start" "-a" "6c151429bb9039efc853642a0e6d399e447b91347dc0241cb8731139d736c5ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling serde v1.0.112
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.63
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.5
[INFO] [stderr]     Checking adler32 v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]    Compiling stdweb v0.4.20
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.63
[INFO] [stderr]    Compiling base-x v0.2.6
[INFO] [stderr]     Checking discard v1.0.4
[INFO] [stderr]     Checking podio v0.1.7
[INFO] [stderr]     Checking simple-error v0.2.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking zip v0.5.6
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.63
[INFO] [stderr]    Compiling serde_derive v1.0.112
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.63
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.63
[INFO] [stderr]    Compiling stdweb-derive v0.5.3
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.9
[INFO] [stderr]     Checking crc32fast-repro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `wasm_bindgen::prelude::*`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use wasm_bindgen::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `wasm_bindgen::prelude::*`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use wasm_bindgen::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `data` are never read
[INFO] [stdout]   --> src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct File {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 59 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 60 |     data: Vec<u8>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `data` are never read
[INFO] [stdout]   --> src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct File {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 59 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 60 |     data: Vec<u8>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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` profile [unoptimized + debuginfo] target(s) in 21.05s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: stdweb v0.4.20, wasm-bindgen v0.2.63
[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" "6c151429bb9039efc853642a0e6d399e447b91347dc0241cb8731139d736c5ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c151429bb9039efc853642a0e6d399e447b91347dc0241cb8731139d736c5ee", kill_on_drop: false }`
[INFO] [stdout] 6c151429bb9039efc853642a0e6d399e447b91347dc0241cb8731139d736c5ee