[INFO] cloning repository https://github.com/radonc0de/pee2_study_guide
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/radonc0de/pee2_study_guide" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fradonc0de%2Fpee2_study_guide", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fradonc0de%2Fpee2_study_guide'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9d2c0ac35b4ea680aa04b0d043713b305ad3a95
[INFO] checking radonc0de/pee2_study_guide against try#f1594433169cca61dd6137e11b86ca894968fb2f for pr-110100
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fradonc0de%2Fpee2_study_guide" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/radonc0de/pee2_study_guide on toolchain f1594433169cca61dd6137e11b86ca894968fb2f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f1594433169cca61dd6137e11b86ca894968fb2f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/radonc0de/pee2_study_guide
[INFO] finished tweaking git repo https://github.com/radonc0de/pee2_study_guide
[INFO] tweaked toml for git repo https://github.com/radonc0de/pee2_study_guide written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/radonc0de/pee2_study_guide 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" "+f1594433169cca61dd6137e11b86ca894968fb2f" "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@sha256:6ef671f6951f6f7b82eaf49ad0b3b99466e493f2d9d82dd96208252612681f61" "/opt/rustwide/cargo-home/bin/cargo" "+f1594433169cca61dd6137e11b86ca894968fb2f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06adfa225ae6629e6f7c2e777fdd3d1d477f54fa125584f0495be8ccafa2f1f3
[INFO] running `Command { std: "docker" "start" "-a" "06adfa225ae6629e6f7c2e777fdd3d1d477f54fa125584f0495be8ccafa2f1f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06adfa225ae6629e6f7c2e777fdd3d1d477f54fa125584f0495be8ccafa2f1f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06adfa225ae6629e6f7c2e777fdd3d1d477f54fa125584f0495be8ccafa2f1f3", kill_on_drop: false }`
[INFO] [stdout] 06adfa225ae6629e6f7c2e777fdd3d1d477f54fa125584f0495be8ccafa2f1f3
[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@sha256:6ef671f6951f6f7b82eaf49ad0b3b99466e493f2d9d82dd96208252612681f61" "/opt/rustwide/cargo-home/bin/cargo" "+f1594433169cca61dd6137e11b86ca894968fb2f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51a2789741b1d21c70e91310d183b12582bd9018446d43ec537db85f53ee0bb7
[INFO] running `Command { std: "docker" "start" "-a" "51a2789741b1d21c70e91310d183b12582bd9018446d43ec537db85f53ee0bb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.80
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking scoped-tls-hkt v0.1.2
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr] thread 'rustc' panicked at 'assertion failed: pos.get() <= self.position()', compiler/rustc_metadata/src/rmeta/encoder.rs:434:9
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] running `Command { std: "docker" "inspect" "51a2789741b1d21c70e91310d183b12582bd9018446d43ec537db85f53ee0bb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a2789741b1d21c70e91310d183b12582bd9018446d43ec537db85f53ee0bb7", kill_on_drop: false }`
[INFO] [stdout] 51a2789741b1d21c70e91310d183b12582bd9018446d43ec537db85f53ee0bb7