[INFO] fetching crate atsamd-usb-host 0.2.0...
[INFO] checking atsamd-usb-host-0.2.0 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate atsamd-usb-host 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate atsamd-usb-host 0.2.0 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate atsamd-usb-host 0.2.0
[INFO] finished tweaking crates.io crate atsamd-usb-host 0.2.0
[INFO] tweaked toml for crates.io crate atsamd-usb-host 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2456241ba668089ff7185acb3f17a18487c46651c2cfdd5a4126a78fe3a0e8f6
[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" "2456241ba668089ff7185acb3f17a18487c46651c2cfdd5a4126a78fe3a0e8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2456241ba668089ff7185acb3f17a18487c46651c2cfdd5a4126a78fe3a0e8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2456241ba668089ff7185acb3f17a18487c46651c2cfdd5a4126a78fe3a0e8f6", kill_on_drop: false }`
[INFO] [stdout] 2456241ba668089ff7185acb3f17a18487c46651c2cfdd5a4126a78fe3a0e8f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 255408a25197f0d65ad92ffbb4d713f21ee82bfce982fea25b567937ca979ffe
[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" "255408a25197f0d65ad92ffbb4d713f21ee82bfce982fea25b567937ca979ffe", kill_on_drop: false }`
[INFO] [stderr]    Compiling atsamd21e18a v0.6.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking starb v0.3.0
[INFO] [stderr]     Checking usb-host v0.1.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking atsamd-hal v0.7.4
[INFO] [stderr]     Checking atsamd-usb-host v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the type `usb_host::DeviceDescriptor` does not permit being left uninitialized
[INFO] [stdout]    --> src/lib.rs:396:22
[INFO] [stdout]     |
[INFO] [stdout] 396 |             unsafe { MaybeUninit::<DeviceDescriptor>::uninit().assume_init() };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this code causes undefined behavior when executed
[INFO] [stdout]     |                      help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] note: enums have to be initialized to a variant
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/usb-host-0.1.2/src/descriptor.rs:13:1
[INFO] [stdout]     |
[INFO] [stdout] 13  | / pub enum DescriptorType {
[INFO] [stdout] 14  | |     Device = 1,
[INFO] [stdout] 15  | |     Configuration = 2,
[INFO] [stdout] 16  | |     String = 3,
[INFO] [stdout] ...   |
[INFO] [stdout] 21  | |     InterfacePower = 8,
[INFO] [stdout] 22  | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `usb_host::DeviceDescriptor` does not permit being left uninitialized
[INFO] [stdout]    --> src/lib.rs:396:22
[INFO] [stdout]     |
[INFO] [stdout] 396 |             unsafe { MaybeUninit::<DeviceDescriptor>::uninit().assume_init() };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this code causes undefined behavior when executed
[INFO] [stdout]     |                      help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] note: enums have to be initialized to a variant
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/usb-host-0.1.2/src/descriptor.rs:13:1
[INFO] [stdout]     |
[INFO] [stdout] 13  | / pub enum DescriptorType {
[INFO] [stdout] 14  | |     Device = 1,
[INFO] [stdout] 15  | |     Configuration = 2,
[INFO] [stdout] 16  | |     String = 3,
[INFO] [stdout] ...   |
[INFO] [stdout] 21  | |     InterfacePower = 8,
[INFO] [stdout] 22  | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.63s
[INFO] running `Command { std: "docker" "inspect" "255408a25197f0d65ad92ffbb4d713f21ee82bfce982fea25b567937ca979ffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "255408a25197f0d65ad92ffbb4d713f21ee82bfce982fea25b567937ca979ffe", kill_on_drop: false }`
[INFO] [stdout] 255408a25197f0d65ad92ffbb4d713f21ee82bfce982fea25b567937ca979ffe