[INFO] cloning repository https://github.com/KayJay7/rpn-c
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KayJay7/rpn-c" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKayJay7%2Frpn-c", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKayJay7%2Frpn-c'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b75643e74bc973b2e8be9def72a32cb8c24a8ebc
[INFO] checking KayJay7/rpn-c against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKayJay7%2Frpn-c" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KayJay7/rpn-c 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] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/KayJay7/rpn-c
[INFO] finished tweaking git repo https://github.com/KayJay7/rpn-c
[INFO] tweaked toml for git repo https://github.com/KayJay7/rpn-c written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/KayJay7/rpn-c 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 rustyline-derive v0.4.0
[INFO] [stderr]   Downloaded hamming v0.1.3
[INFO] [stderr]   Downloaded rustyline v9.0.0
[INFO] [stderr]   Downloaded beef v0.5.1
[INFO] [stderr]   Downloaded logos v0.12.0
[INFO] [stderr]   Downloaded logos-derive v0.12.0
[INFO] [stderr]   Downloaded ramp v0.7.0
[INFO] [stderr]   Downloaded fd-lock v3.0.0
[INFO] [stderr]   Downloaded nix v0.22.2
[INFO] [stderr]   Downloaded syn v1.0.78
[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] 94770881c2a7cccd50a4227e90eef2fb52b48d4c26166ed5bf7e46135057e88d
[INFO] running `Command { std: "docker" "start" "-a" "94770881c2a7cccd50a4227e90eef2fb52b48d4c26166ed5bf7e46135057e88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94770881c2a7cccd50a4227e90eef2fb52b48d4c26166ed5bf7e46135057e88d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94770881c2a7cccd50a4227e90eef2fb52b48d4c26166ed5bf7e46135057e88d", kill_on_drop: false }`
[INFO] [stdout] 94770881c2a7cccd50a4227e90eef2fb52b48d4c26166ed5bf7e46135057e88d
[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] 060568492af374e2feb96d1c416646f086941784ece64560bcbea2fb93a759a0
[INFO] running `Command { std: "docker" "start" "-a" "060568492af374e2feb96d1c416646f086941784ece64560bcbea2fb93a759a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling syn v1.0.78
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling num-bigint v0.4.2
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling beef v0.5.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking ieee754 v0.2.6
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.6
[INFO] [stderr]     Checking fd-lock v3.0.0
[INFO] [stderr]     Checking nix v0.22.2
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking directories v3.0.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling addr2line v0.16.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]     Checking rustyline v9.0.0
[INFO] [stderr]    Compiling logos-derive v0.12.0
[INFO] [stderr]    Compiling rustyline-derive v0.4.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling rustc-cfg v0.4.0
[INFO] [stderr]    Compiling ramp v0.7.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking rpn-c v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/calculator/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]  --> src/calculator/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `String` is already defined here
[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 18.39s
[INFO] running `Command { std: "docker" "inspect" "060568492af374e2feb96d1c416646f086941784ece64560bcbea2fb93a759a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "060568492af374e2feb96d1c416646f086941784ece64560bcbea2fb93a759a0", kill_on_drop: false }`
[INFO] [stdout] 060568492af374e2feb96d1c416646f086941784ece64560bcbea2fb93a759a0