[INFO] fetching crate feather_m4 0.13.1...
[INFO] checking feather_m4-0.13.1 against try#264a7c4a1c917c83d13895a31231f9d93c7b67e1 for pr-132289
[INFO] extracting crate feather_m4 0.13.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate feather_m4 0.13.1 on toolchain 264a7c4a1c917c83d13895a31231f9d93c7b67e1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate feather_m4 0.13.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate feather_m4 0.13.1
[INFO] tweaked toml for crates.io crate feather_m4 0.13.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate feather_m4 0.13.1 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" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9c522b3ca3cd79a9f879f4720eaa293927c4a3fc4e316610f760d65e355d442c
[INFO] running `Command { std: "docker" "start" "-a" "9c522b3ca3cd79a9f879f4720eaa293927c4a3fc4e316610f760d65e355d442c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c522b3ca3cd79a9f879f4720eaa293927c4a3fc4e316610f760d65e355d442c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c522b3ca3cd79a9f879f4720eaa293927c4a3fc4e316610f760d65e355d442c", kill_on_drop: false }`
[INFO] [stdout] 9c522b3ca3cd79a9f879f4720eaa293927c4a3fc4e316610f760d65e355d442c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b6b7942ef38423642ad13da2c6bfc257b2082a62c29015dc83d418dbc4525ec
[INFO] running `Command { std: "docker" "start" "-a" "3b6b7942ef38423642ad13da2c6bfc257b2082a62c29015dc83d418dbc4525ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
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[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/timers.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/pwm.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/blinky_basic.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/timers.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/pwm.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[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] [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] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/blinky_basic.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/trng.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/trng.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[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] [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] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/sleeping_timer_rtc.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/sleeping_timer_rtc.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/serial.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]  --> examples/serial.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]   = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/uart_poll_echo.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | #[cfg(not(feature = "use_semihosting"))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `use_semihosting`
[INFO] [stdout]   --> examples/uart_poll_echo.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[cfg(feature = "use_semihosting")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `cortex-m-rt`, `default`, `dma`, `max-channels`, `rt`, `usb`, and `usb-device`
[INFO] [stdout]    = help: consider adding `use_semihosting` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[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] [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] [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 `feather_m4` (example "timers") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `feather_m4` (example "trng") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "pwm") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "blinky_basic") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "serial") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "uart_poll_echo") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "sleeping_timer_rtc") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] error: could not compile `feather_m4` (example "clocking_v2") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3b6b7942ef38423642ad13da2c6bfc257b2082a62c29015dc83d418dbc4525ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b6b7942ef38423642ad13da2c6bfc257b2082a62c29015dc83d418dbc4525ec", kill_on_drop: false }`
[INFO] [stdout] 3b6b7942ef38423642ad13da2c6bfc257b2082a62c29015dc83d418dbc4525ec
