[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 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlsaiSamo%2Fembed_rust_playground" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AlsaiSamo/embed_rust_playground on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-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-0-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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2ca3d6955196846a40161c8da019546cff1ad417c6ef3bcb6379a6cfb7edfa5
[INFO] running `Command { std: "docker" "start" "-a" "e2ca3d6955196846a40161c8da019546cff1ad417c6ef3bcb6379a6cfb7edfa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2ca3d6955196846a40161c8da019546cff1ad417c6ef3bcb6379a6cfb7edfa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2ca3d6955196846a40161c8da019546cff1ad417c6ef3bcb6379a6cfb7edfa5", kill_on_drop: false }`
[INFO] [stdout] e2ca3d6955196846a40161c8da019546cff1ad417c6ef3bcb6379a6cfb7edfa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 850d2e26bbb300e6bc89d4e1a1762d65f3dfbc423e516b54c499ae40fe06547f
[INFO] running `Command { std: "docker" "start" "-a" "850d2e26bbb300e6bc89d4e1a1762d65f3dfbc423e516b54c499ae40fe06547f", kill_on_drop: false }`
[INFO] [stderr] error: output of --print=file-names missing when learning about target-specific information from rustc
[INFO] [stderr] command was: `/opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc/bin/rustc - --crate-name ___ --print=file-names --cap-lints=allow --target thumbv7em-none-eabihf --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg`
[INFO] [stderr] 
[INFO] [stderr] --- stdout
[INFO] [stderr] ___
[INFO] [stderr] lib___.rlib
[INFO] [stderr] lib___.a
[INFO] [stderr] /opt/rustwide/rustup-home/toolchains/506512391b1a75ae450d36c9420978402a91abcc
[INFO] [stderr] off
[INFO] [stderr] ___
[INFO] [stderr] debug_assertions
[INFO] [stderr] overflow_checks
[INFO] [stderr] panic="abort"
[INFO] [stderr] proc_macro
[INFO] [stderr] relocation_model="static"
[INFO] [stderr] target_abi="eabihf"
[INFO] [stderr] target_arch="arm"
[INFO] [stderr] target_endian="little"
[INFO] [stderr] target_env=""
[INFO] [stderr] target_feature="dsp"
[INFO] [stderr] target_feature="mclass"
[INFO] [stderr] target_feature="thumb-mode"
[INFO] [stderr] target_feature="thumb2"
[INFO] [stderr] target_feature="v5te"
[INFO] [stderr] target_feature="v6"
[INFO] [stderr] target_feature="v6k"
[INFO] [stderr] target_feature="v6t2"
[INFO] [stderr] target_feature="v7"
[INFO] [stderr] target_has_atomic
[INFO] [stderr] target_has_atomic="16"
[INFO] [stderr] target_has_atomic="32"
[INFO] [stderr] target_has_atomic="8"
[INFO] [stderr] target_has_atomic="ptr"
[INFO] [stderr] target_has_atomic_equal_alignment="16"
[INFO] [stderr] target_has_atomic_equal_alignment="32"
[INFO] [stderr] target_has_atomic_equal_alignment="8"
[INFO] [stderr] target_has_atomic_equal_alignment="ptr"
[INFO] [stderr] target_has_atomic_load_store
[INFO] [stderr] target_has_atomic_load_store="16"
[INFO] [stderr] target_has_atomic_load_store="32"
[INFO] [stderr] target_has_atomic_load_store="8"
[INFO] [stderr] target_has_atomic_load_store="ptr"
[INFO] [stderr] target_os="none"
[INFO] [stderr] target_pointer_width="32"
[INFO] [stderr] target_vendor="unknown"
[INFO] [stderr] ub_checks
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "850d2e26bbb300e6bc89d4e1a1762d65f3dfbc423e516b54c499ae40fe06547f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "850d2e26bbb300e6bc89d4e1a1762d65f3dfbc423e516b54c499ae40fe06547f", kill_on_drop: false }`
[INFO] [stdout] 850d2e26bbb300e6bc89d4e1a1762d65f3dfbc423e516b54c499ae40fe06547f