[INFO] fetching crate collatz 0.5.1...
[INFO] checking collatz-0.5.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate collatz 0.5.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate collatz 0.5.1 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 collatz 0.5.1
[INFO] finished tweaking crates.io crate collatz 0.5.1
[INFO] tweaked toml for crates.io crate collatz 0.5.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate collatz 0.5.1 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 unicode-ident v1.0.10
[INFO] [stderr]   Downloaded meval v0.2.0
[INFO] [stderr]   Downloaded drawille v0.3.0
[INFO] [stderr]   Downloaded rgb v0.8.36
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded quote v1.0.29
[INFO] [stderr]   Downloaded bytemuck v1.13.1
[INFO] [stderr]   Downloaded nom v1.2.4
[INFO] [stderr]   Downloaded textplots v0.8.0
[INFO] [stderr]   Downloaded rustix v0.38.3
[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] b5fe13c49c6515ffe65c4a9dc21519c405044fa55ab1d07a0358b1423fca634f
[INFO] running `Command { std: "docker" "start" "-a" "b5fe13c49c6515ffe65c4a9dc21519c405044fa55ab1d07a0358b1423fca634f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5fe13c49c6515ffe65c4a9dc21519c405044fa55ab1d07a0358b1423fca634f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5fe13c49c6515ffe65c4a9dc21519c405044fa55ab1d07a0358b1423fca634f", kill_on_drop: false }`
[INFO] [stdout] b5fe13c49c6515ffe65c4a9dc21519c405044fa55ab1d07a0358b1423fca634f
[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] 0a05530a7742e65cd5510fdb467a7d51ffc51389d2dfa60f5868632139890054
[INFO] running `Command { std: "docker" "start" "-a" "0a05530a7742e65cd5510fdb467a7d51ffc51389d2dfa60f5868632139890054", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling rustix v0.38.3
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]     Checking linux-raw-sys v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking rgb v0.8.36
[INFO] [stderr]     Checking meval v0.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking colored v2.0.4
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]     Checking drawille v0.3.0
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking collatz v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking textplots v0.8.0
[INFO] [stdout] warning: the item `collatz` is imported redundantly
[INFO] [stdout]  --> examples/get_steps.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use collatz;
[INFO] [stdout]   |     ^^^^^^^ the item `collatz` 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 `collatz` is imported redundantly
[INFO] [stdout]  --> examples/total_stopping_time.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use collatz;
[INFO] [stdout]   |     ^^^^^^^ the item `collatz` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.64s
[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 1`
[INFO] running `Command { std: "docker" "inspect" "0a05530a7742e65cd5510fdb467a7d51ffc51389d2dfa60f5868632139890054", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a05530a7742e65cd5510fdb467a7d51ffc51389d2dfa60f5868632139890054", kill_on_drop: false }`
[INFO] [stdout] 0a05530a7742e65cd5510fdb467a7d51ffc51389d2dfa60f5868632139890054
[INFO] checking collatz-0.5.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate collatz 0.5.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate collatz 0.5.1 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate collatz 0.5.1
[INFO] finished tweaking crates.io crate collatz 0.5.1
[INFO] tweaked toml for crates.io crate collatz 0.5.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate collatz 0.5.1 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf428c90e4d6f405b3a6ab756634d93092e6098c9d07710468ec4d6663c4a7f1
[INFO] running `Command { std: "docker" "start" "-a" "bf428c90e4d6f405b3a6ab756634d93092e6098c9d07710468ec4d6663c4a7f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf428c90e4d6f405b3a6ab756634d93092e6098c9d07710468ec4d6663c4a7f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf428c90e4d6f405b3a6ab756634d93092e6098c9d07710468ec4d6663c4a7f1", kill_on_drop: false }`
[INFO] [stdout] bf428c90e4d6f405b3a6ab756634d93092e6098c9d07710468ec4d6663c4a7f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df2a0c41ab281ffeb9cb33e156195fb0450970676bef123230a0930c8e9aca7a
[INFO] running `Command { std: "docker" "start" "-a" "df2a0c41ab281ffeb9cb33e156195fb0450970676bef123230a0930c8e9aca7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling rustix v0.38.3
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]     Checking linux-raw-sys v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]     Checking rgb v0.8.36
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking meval v0.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking colored v2.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking drawille v0.3.0
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking collatz v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking textplots v0.8.0
[INFO] [stdout] warning: the item `collatz` is imported redundantly
[INFO] [stdout]  --> examples/get_steps.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use collatz;
[INFO] [stdout]   |     ^^^^^^^ the item `collatz` 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 `collatz` is imported redundantly
[INFO] [stdout]  --> examples/total_stopping_time.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use collatz;
[INFO] [stdout]   |     ^^^^^^^ the item `collatz` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.71s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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 1`
[INFO] running `Command { std: "docker" "inspect" "df2a0c41ab281ffeb9cb33e156195fb0450970676bef123230a0930c8e9aca7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df2a0c41ab281ffeb9cb33e156195fb0450970676bef123230a0930c8e9aca7a", kill_on_drop: false }`
[INFO] [stdout] df2a0c41ab281ffeb9cb33e156195fb0450970676bef123230a0930c8e9aca7a