[INFO] fetching crate p256-cortex-m4 0.1.0-alpha.6...
[INFO] checking p256-cortex-m4-0.1.0-alpha.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate p256-cortex-m4 0.1.0-alpha.6 into /workspace/builds/worker-1-tc2/source
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-1-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate p256-cortex-m4 0.1.0-alpha.6
[INFO] finished tweaking crates.io crate p256-cortex-m4 0.1.0-alpha.6
[INFO] tweaked toml for crates.io crate p256-cortex-m4 0.1.0-alpha.6 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate p256-cortex-m4 0.1.0-alpha.6 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages to latest compatible versions
[INFO] [stderr]       Adding der v0.4.5 (available: v0.7.10)
[INFO] [stderr]       Adding ecdsa v0.12.4 (available: v0.16.9)
[INFO] [stderr]       Adding elliptic-curve v0.10.6 (available: v0.13.8)
[INFO] [stderr]       Adding p256 v0.9.0 (available: v0.13.2)
[INFO] [stderr]       Adding rand_core v0.6.4 (available: v0.9.3)
[INFO] [stderr]       Adding sha2 v0.9.9 (available: v0.10.9)
[INFO] [stderr]       Adding signature v1.3.2 (available: v1.6.4)
[INFO] [stderr]       Adding subtle v2.4.1 (available: v2.6.1)
[INFO] [stderr]       Adding zeroize v1.4.3 (available: v1.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c17a45dcf663036741f495ff9e7f86d86df0900df23cce85aba91c6436df9a1b
[INFO] running `Command { std: "docker" "start" "-a" "c17a45dcf663036741f495ff9e7f86d86df0900df23cce85aba91c6436df9a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c17a45dcf663036741f495ff9e7f86d86df0900df23cce85aba91c6436df9a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c17a45dcf663036741f495ff9e7f86d86df0900df23cce85aba91c6436df9a1b", kill_on_drop: false }`
[INFO] [stdout] c17a45dcf663036741f495ff9e7f86d86df0900df23cce85aba91c6436df9a1b
[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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc350932a253db33789ca9784e11cd8917867bce82d97964f111cfaca26882b6
[INFO] running `Command { std: "docker" "start" "-a" "bc350932a253db33789ca9784e11cd8917867bce82d97964f111cfaca26882b6", kill_on_drop: false }`
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking der v0.4.5
[INFO] [stderr]    Compiling p256-cortex-m4 v0.1.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking zeroize v1.4.3
[INFO] [stderr]    Compiling p256-cortex-m4-sys v0.1.0
[INFO] [stderr]     Checking ff v0.10.1
[INFO] [stderr]     Checking crypto-mac v0.11.1
[INFO] [stderr]     Checking group v0.10.0
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]     Checking signature v1.3.2
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking crypto-bigint v0.2.11
[INFO] [stderr]     Checking elliptic-curve v0.10.6
[INFO] [stderr]     Checking ecdsa v0.12.4
[INFO] [stderr]     Checking p256 v0.9.0
[INFO] [stdout] warning: unexpected `cfg` condition name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 | #[cfg(cortex_m4)]
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | #[cfg(cortex_m4)]
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:40:51
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(feature = "non-cortex-m4-fallback", not(cortex_m4)))]
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:42:51
[INFO] [stdout]    |
[INFO] [stdout] 42 | #[cfg(all(feature = "non-cortex-m4-fallback", not(cortex_m4)))]
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 | #[cfg(cortex_m4)]
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | #[cfg(cortex_m4)]
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:40:51
[INFO] [stdout]    |
[INFO] [stdout] 40 | #[cfg(all(feature = "non-cortex-m4-fallback", not(cortex_m4)))]
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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 name: `cortex_m4`
[INFO] [stdout]   --> src/lib.rs:42:51
[INFO] [stdout]    |
[INFO] [stdout] 42 | #[cfg(all(feature = "non-cortex-m4-fallback", not(cortex_m4)))]
[INFO] [stdout]    |                                                   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(cortex_m4)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(cortex_m4)");` to the top of the `build.rs`
[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: this type will no longer be must used: core::result::Result<&GenericArray<u8, elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]   --> src/fallback.rs:84:76
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let prehashed_message_as_scalar = p256::Scalar::from_bytes_reduced(prehashed_message.try_into().unwrap());
[INFO] [stdout]    |                                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<&GenericArray<u8, elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]    --> src/fallback.rs:171:75
[INFO] [stdout]     |
[INFO] [stdout] 171 |        let prehashed_message_as_scalar = p256::Scalar::from_bytes_reduced(prehashed_message.try_into().unwrap());
[INFO] [stdout]     |                                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `p256-cortex-m4` (lib test) due to 2 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<&GenericArray<u8, elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]   --> src/fallback.rs:84:76
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let prehashed_message_as_scalar = p256::Scalar::from_bytes_reduced(prehashed_message.try_into().unwrap());
[INFO] [stdout]    |                                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<&GenericArray<u8, elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<elliptic_curve::generic_array::typenum::UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]    --> src/fallback.rs:171:75
[INFO] [stdout]     |
[INFO] [stdout] 171 |        let prehashed_message_as_scalar = p256::Scalar::from_bytes_reduced(prehashed_message.try_into().unwrap());
[INFO] [stdout]     |                                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `p256-cortex-m4` (lib) due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "bc350932a253db33789ca9784e11cd8917867bce82d97964f111cfaca26882b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc350932a253db33789ca9784e11cd8917867bce82d97964f111cfaca26882b6", kill_on_drop: false }`
[INFO] [stdout] bc350932a253db33789ca9784e11cd8917867bce82d97964f111cfaca26882b6
