[INFO] cloning repository https://github.com/AlsaiSamo/embed_rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlsaiSamo/embed_rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlsaiSamo%2Fembed_rust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlsaiSamo%2Fembed_rust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b5830ede8f89694fd36f7c7813a7a2fedeb9d14b
[INFO] checking AlsaiSamo/embed_rust_playground/b5830ede8f89694fd36f7c7813a7a2fedeb9d14b against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlsaiSamo%2Fembed_rust_playground" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AlsaiSamo/embed_rust_playground on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/AlsaiSamo/embed_rust_playground
[INFO] finished tweaking git repo https://github.com/AlsaiSamo/embed_rust_playground
[INFO] tweaked toml for git repo https://github.com/AlsaiSamo/embed_rust_playground written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/AlsaiSamo/embed_rust_playground 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc6ac9bbba3d874526b7d1710411d71e84173c77245df6cc231c58823fffe8ab
[INFO] running `Command { std: "docker" "start" "-a" "fc6ac9bbba3d874526b7d1710411d71e84173c77245df6cc231c58823fffe8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc6ac9bbba3d874526b7d1710411d71e84173c77245df6cc231c58823fffe8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc6ac9bbba3d874526b7d1710411d71e84173c77245df6cc231c58823fffe8ab", kill_on_drop: false }`
[INFO] [stdout] fc6ac9bbba3d874526b7d1710411d71e84173c77245df6cc231c58823fffe8ab
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68a0a799b5c412160740e79e908fe1b1114cf547c92ca06cbe73a05a34282f4f
[INFO] running `Command { std: "docker" "start" "-a" "68a0a799b5c412160740e79e908fe1b1114cf547c92ca06cbe73a05a34282f4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling at32f403acgu7_experiment v0.1.0 (/opt/rustwide/workdir/at32f403acgu7_experiment)
[INFO] [stdout] error[E0463]: can't find crate for `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `thumbv7em-none-eabihf` target may not be installed
[INFO] [stdout]   = help: consider downloading the target with `rustup target add thumbv7em-none-eabihf`
[INFO] [stdout]   = help: consider building the standard library from source with `cargo build -Zbuild-std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `core`
[INFO] [stdout]   |
[INFO] [stdout]   = note: the `thumbv7em-none-eabihf` target may not be installed
[INFO] [stdout]   = help: consider downloading the target with `rustup target add thumbv7em-none-eabihf`
[INFO] [stdout]   = help: consider building the standard library from source with `cargo build -Zbuild-std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `at32f403acgu7_experiment` (bin "at32f403acgu7_experiment") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `at32f403acgu7_experiment` (bin "at32f403acgu7_experiment" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "68a0a799b5c412160740e79e908fe1b1114cf547c92ca06cbe73a05a34282f4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68a0a799b5c412160740e79e908fe1b1114cf547c92ca06cbe73a05a34282f4f", kill_on_drop: false }`
[INFO] [stdout] 68a0a799b5c412160740e79e908fe1b1114cf547c92ca06cbe73a05a34282f4f