[INFO] cloning repository https://github.com/guccialex/shared
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guccialex/shared" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguccialex%2Fshared", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguccialex%2Fshared'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 93e5ca15255d8869bebdc2b3d02583b764c62a92
[INFO] checking guccialex/shared against try#8ce16caa975da810c768ab50cc10f47a50531548 for pr-115538
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguccialex%2Fshared" "/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/guccialex/shared on toolchain 8ce16caa975da810c768ab50cc10f47a50531548
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ce16caa975da810c768ab50cc10f47a50531548" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guccialex/shared
[INFO] finished tweaking git repo https://github.com/guccialex/shared
[INFO] tweaked toml for git repo https://github.com/guccialex/shared written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/guccialex/shared 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" "+8ce16caa975da810c768ab50cc10f47a50531548" "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@sha256:8d77639b970c52ec67607038b3ec48894629de24504b62a68269497566821cc0" "/opt/rustwide/cargo-home/bin/cargo" "+8ce16caa975da810c768ab50cc10f47a50531548" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3897947aa9253f57c10463be81ff0f388a8503cdcd8e6a2b1828d52c0061991
[INFO] running `Command { std: "docker" "start" "-a" "d3897947aa9253f57c10463be81ff0f388a8503cdcd8e6a2b1828d52c0061991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3897947aa9253f57c10463be81ff0f388a8503cdcd8e6a2b1828d52c0061991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3897947aa9253f57c10463be81ff0f388a8503cdcd8e6a2b1828d52c0061991", kill_on_drop: false }`
[INFO] [stdout] d3897947aa9253f57c10463be81ff0f388a8503cdcd8e6a2b1828d52c0061991
[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@sha256:8d77639b970c52ec67607038b3ec48894629de24504b62a68269497566821cc0" "/opt/rustwide/cargo-home/bin/cargo" "+8ce16caa975da810c768ab50cc10f47a50531548" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 030e93142a3e3025090df6f7a1d7c2b653cdbb174ca61a11f6cf6c74e5ab7f1a
[INFO] running `Command { std: "docker" "start" "-a" "030e93142a3e3025090df6f7a1d7c2b653cdbb174ca61a11f6cf6c74e5ab7f1a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr] thread 'rustc' panicked at compiler/rustc_metadata/src/rmeta/encoder.rs:450:9:
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] running `Command { std: "docker" "inspect" "030e93142a3e3025090df6f7a1d7c2b653cdbb174ca61a11f6cf6c74e5ab7f1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030e93142a3e3025090df6f7a1d7c2b653cdbb174ca61a11f6cf6c74e5ab7f1a", kill_on_drop: false }`
[INFO] [stdout] 030e93142a3e3025090df6f7a1d7c2b653cdbb174ca61a11f6cf6c74e5ab7f1a