[INFO] fetching crate serpente 0.5.0...
[INFO] checking serpente-0.5.0 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate serpente 0.5.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate serpente 0.5.0 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking crates.io crate serpente 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate serpente 0.5.0
[INFO] tweaked toml for crates.io crate serpente 0.5.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate serpente 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.13
[INFO] [stderr]   Downloaded atsamd-hal v0.12.0
[INFO] [stderr]   Downloaded atsamd21e v0.9.0
[INFO] [stderr]   Downloaded cortex-m v0.6.4
[INFO] [stderr]   Downloaded as-slice v0.1.4
[INFO] [stderr]   Downloaded panic-halt v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2449f6657ed684f59eb1a5341fcb288fbe2c0404823a2f0b121d2b03810ed014
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2449f6657ed684f59eb1a5341fcb288fbe2c0404823a2f0b121d2b03810ed014", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2449f6657ed684f59eb1a5341fcb288fbe2c0404823a2f0b121d2b03810ed014", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2449f6657ed684f59eb1a5341fcb288fbe2c0404823a2f0b121d2b03810ed014", kill_on_drop: false }`
[INFO] [stdout] 2449f6657ed684f59eb1a5341fcb288fbe2c0404823a2f0b121d2b03810ed014
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3419403917eece7f9ca4d6946a50f1a8c53f07d7e5cf6dcd8b3f68dd01013c28
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3419403917eece7f9ca4d6946a50f1a8c53f07d7e5cf6dcd8b3f68dd01013c28", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.6.4
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling atsamd21e v0.9.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling serpente v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]     Checking as-slice v0.1.4
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking cortex-m-rt v0.6.13
[INFO] [stderr]     Checking atsamd-hal v0.12.0
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serpente`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3419403917eece7f9ca4d6946a50f1a8c53f07d7e5cf6dcd8b3f68dd01013c28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3419403917eece7f9ca4d6946a50f1a8c53f07d7e5cf6dcd8b3f68dd01013c28", kill_on_drop: false }`
[INFO] [stdout] 3419403917eece7f9ca4d6946a50f1a8c53f07d7e5cf6dcd8b3f68dd01013c28