[INFO] fetching crate covert_client 0.1.5...
[INFO] checking covert_client-0.1.5 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate covert_client 0.1.5 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate covert_client 0.1.5
[INFO] finished tweaking crates.io crate covert_client 0.1.5
[INFO] tweaked toml for crates.io crate covert_client 0.1.5 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate covert_client 0.1.5 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate covert_client 0.1.5 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d91b5a04a9fe725c11dcbe8847c891d9a6978ebda83b521cfee1a118b58a5a90
[INFO] running `Command { std: "docker" "start" "-a" "d91b5a04a9fe725c11dcbe8847c891d9a6978ebda83b521cfee1a118b58a5a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d91b5a04a9fe725c11dcbe8847c891d9a6978ebda83b521cfee1a118b58a5a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d91b5a04a9fe725c11dcbe8847c891d9a6978ebda83b521cfee1a118b58a5a90", kill_on_drop: false }`
[INFO] [stdout] d91b5a04a9fe725c11dcbe8847c891d9a6978ebda83b521cfee1a118b58a5a90
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2c1b034bed2adebae762d4927cfb7e8a2b78a76ccb98c636dbd0eae0004ea1f
[INFO] running `Command { std: "docker" "start" "-a" "f2c1b034bed2adebae762d4927cfb7e8a2b78a76ccb98c636dbd0eae0004ea1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling windows_x86_64_gnu v0.39.0
[INFO] [stdout] error[E0463]: can't find crate for `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `x86_64-pc-windows-gnu` target may not be installed
[INFO] [stdout]   = help: consider downloading the target with `rustup target add x86_64-pc-windows-gnu`
[INFO] [stdout]   = help: consider building the standard library from source with `cargo build -Zbuild-std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `windows_x86_64_gnu` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f2c1b034bed2adebae762d4927cfb7e8a2b78a76ccb98c636dbd0eae0004ea1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2c1b034bed2adebae762d4927cfb7e8a2b78a76ccb98c636dbd0eae0004ea1f", kill_on_drop: false }`
[INFO] [stdout] f2c1b034bed2adebae762d4927cfb7e8a2b78a76ccb98c636dbd0eae0004ea1f