[INFO] fetching crate panic-semihosting 0.6.0...
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] crate panic-semihosting 0.6.0 is already in cache
[INFO] checking panic-semihosting-0.6.0 against master#ea6ab1bd845790fb31ba790d2c7aec898f89fe62 for pr-99880
[INFO] extracting crate panic-semihosting 0.6.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate panic-semihosting 0.6.0 on toolchain ea6ab1bd845790fb31ba790d2c7aec898f89fe62
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ea6ab1bd845790fb31ba790d2c7aec898f89fe62" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-semihosting 0.6.0
[INFO] finished tweaking crates.io crate panic-semihosting 0.6.0
[INFO] tweaked toml for crates.io crate panic-semihosting 0.6.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ea6ab1bd845790fb31ba790d2c7aec898f89fe62" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ea6ab1bd845790fb31ba790d2c7aec898f89fe62" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitfield v0.13.2
[INFO] [stderr]   Downloaded embedded-hal v0.2.7
[INFO] [stderr]   Downloaded vcell v0.1.3
[INFO] [stderr]   Downloaded volatile-register v0.2.1
[INFO] [stderr]   Downloaded cortex-m v0.7.5
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+ea6ab1bd845790fb31ba790d2c7aec898f89fe62" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbf76014089cea6e1a0764a9bebe00e78188b5b6bc88ab8b6c1908e6b62e8425
[INFO] running `Command { std: "docker" "start" "-a" "dbf76014089cea6e1a0764a9bebe00e78188b5b6bc88ab8b6c1908e6b62e8425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbf76014089cea6e1a0764a9bebe00e78188b5b6bc88ab8b6c1908e6b62e8425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbf76014089cea6e1a0764a9bebe00e78188b5b6bc88ab8b6c1908e6b62e8425", kill_on_drop: false }`
[INFO] [stdout] dbf76014089cea6e1a0764a9bebe00e78188b5b6bc88ab8b6c1908e6b62e8425
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+ea6ab1bd845790fb31ba790d2c7aec898f89fe62" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1af8af80819ab75fef246b55898a7ba780206e931f12b849f1d969c224ff4312
[INFO] running `Command { std: "docker" "start" "-a" "1af8af80819ab75fef246b55898a7ba780206e931f12b849f1d969c224ff4312", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cortex-m v0.7.5
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.5.0
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking panic-semihosting v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "1af8af80819ab75fef246b55898a7ba780206e931f12b849f1d969c224ff4312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1af8af80819ab75fef246b55898a7ba780206e931f12b849f1d969c224ff4312", kill_on_drop: false }`
[INFO] [stdout] 1af8af80819ab75fef246b55898a7ba780206e931f12b849f1d969c224ff4312