[INFO] fetching crate metro_m0 0.20.3...
[INFO] testing metro_m0-0.20.3 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate metro_m0 0.20.3 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate metro_m0 0.20.3
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate metro_m0 0.20.3
[INFO] tweaked toml for crates.io crate metro_m0 0.20.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate metro_m0 0.20.3 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate metro_m0 0.20.3 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71236172d483f4dd2d91107b843b177e242147bdd37f5f8d3e5c236c1d1abdb2
[INFO] running `Command { std: "docker" "start" "-a" "71236172d483f4dd2d91107b843b177e242147bdd37f5f8d3e5c236c1d1abdb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71236172d483f4dd2d91107b843b177e242147bdd37f5f8d3e5c236c1d1abdb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71236172d483f4dd2d91107b843b177e242147bdd37f5f8d3e5c236c1d1abdb2", kill_on_drop: false }`
[INFO] [stdout] 71236172d483f4dd2d91107b843b177e242147bdd37f5f8d3e5c236c1d1abdb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26773bf47b981a0f18b22bd11f276094d9cd35aefa6bc5373911addd5a74f94c
[INFO] running `Command { std: "docker" "start" "-a" "26773bf47b981a0f18b22bd11f276094d9cd35aefa6bc5373911addd5a74f94c", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling cortex-m v0.7.7
[INFO] [stderr]    Compiling cortex-m-rt v0.7.5
[INFO] [stderr]    Compiling itoa v1.0.17
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.11
[INFO] [stderr]    Compiling ryu v1.0.23
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling atsamd21g v0.14.2
[INFO] [stderr]    Compiling critical-section v1.2.0
[INFO] [stderr]    Compiling crypto-common v0.1.7
[INFO] [stderr]    Compiling bitfield v0.13.2
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling litrs v0.4.2
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling volatile-register v0.2.2
[INFO] [stderr]    Compiling gcd v2.3.0
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling sorted-hlist v0.2.0
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling cipher v0.4.4
[INFO] [stderr]    Compiling fugit v0.3.9
[INFO] [stderr]    Compiling metro_m0 v0.20.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling embedded-io v0.6.1
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling phf v0.11.3
[INFO] [stderr]    Compiling aes v0.8.4
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]    Compiling modular-bitfield v0.11.2
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.5
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_yaml v0.9.34+deprecated
[INFO] [stderr]    Compiling atsamd-hal-macros v0.3.0
[INFO] [stderr]    Compiling atsamd-hal v0.23.3
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.36s
[INFO] running `Command { std: "docker" "inspect" "26773bf47b981a0f18b22bd11f276094d9cd35aefa6bc5373911addd5a74f94c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26773bf47b981a0f18b22bd11f276094d9cd35aefa6bc5373911addd5a74f94c", kill_on_drop: false }`
[INFO] [stdout] 26773bf47b981a0f18b22bd11f276094d9cd35aefa6bc5373911addd5a74f94c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2199661d12c4804f1f8406c234c8fcf7318468f7e777a8b366b6a34b8f354b8f
[INFO] running `Command { std: "docker" "start" "-a" "2199661d12c4804f1f8406c234c8fcf7318468f7e777a8b366b6a34b8f354b8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.7
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling panic-semihosting v0.5.6
[INFO] [stderr]    Compiling usb-device v0.3.2
[INFO] [stderr]    Compiling usbd-serial v0.2.2
[INFO] [stderr]    Compiling metro_m0 v0.20.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metro_m0` (example "blinky_basic") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2199661d12c4804f1f8406c234c8fcf7318468f7e777a8b366b6a34b8f354b8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2199661d12c4804f1f8406c234c8fcf7318468f7e777a8b366b6a34b8f354b8f", kill_on_drop: false }`
[INFO] [stdout] 2199661d12c4804f1f8406c234c8fcf7318468f7e777a8b366b6a34b8f354b8f