[INFO] fetching crate p256-cortex-m4 0.1.0-alpha.6...
[INFO] checking p256-cortex-m4-0.1.0-alpha.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate p256-cortex-m4 0.1.0-alpha.6 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate p256-cortex-m4 0.1.0-alpha.6 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-tc1/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-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 36 packages
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding crypto-bigint v0.2.11 (latest: v0.5.5)
[INFO] [stderr]       Adding der v0.4.5 (latest: v0.7.9)
[INFO] [stderr]       Adding der_derive v0.4.1 (latest: v0.7.2)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ecdsa v0.12.4 (latest: v0.16.9)
[INFO] [stderr]       Adding elliptic-curve v0.10.6 (latest: v0.13.8)
[INFO] [stderr]       Adding ff v0.10.1 (latest: v0.13.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding group v0.10.0 (latest: v0.13.0)
[INFO] [stderr]       Adding hmac v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding p256 v0.9.0 (latest: v0.13.2)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding signature v1.3.2 (latest: v2.2.0)
[INFO] [stderr]       Adding subtle v2.4.1 (latest: v2.5.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding zeroize v1.4.3 (latest: v1.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded group v0.10.0
[INFO] [stderr]   Downloaded ff v0.10.1
[INFO] [stderr]   Downloaded p256 v0.9.0
[INFO] [stderr]   Downloaded zeroize v1.4.3
[INFO] [stderr]   Downloaded der_derive v0.4.1
[INFO] [stderr]   Downloaded ecdsa v0.12.4
[INFO] [stderr]   Downloaded signature v1.3.2
[INFO] [stderr]   Downloaded der v0.4.5
[INFO] [stderr]   Downloaded crypto-bigint v0.2.11
[INFO] [stderr]   Downloaded elliptic-curve v0.10.6
[INFO] [stderr]   Downloaded p256-cortex-m4-sys v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92f8094b854f283328379e48622bd5ed785833d4c4ef69eaf29170a4aada98a2
[INFO] running `Command { std: "docker" "start" "-a" "92f8094b854f283328379e48622bd5ed785833d4c4ef69eaf29170a4aada98a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92f8094b854f283328379e48622bd5ed785833d4c4ef69eaf29170a4aada98a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92f8094b854f283328379e48622bd5ed785833d4c4ef69eaf29170a4aada98a2", kill_on_drop: false }`
[INFO] [stdout] 92f8094b854f283328379e48622bd5ed785833d4c4ef69eaf29170a4aada98a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8aea4e59beb95567ee8703c0ba02cdc05d6b8c84db9a3369fd57645f9bd23ae4
[INFO] running `Command { std: "docker" "start" "-a" "8aea4e59beb95567ee8703c0ba02cdc05d6b8c84db9a3369fd57645f9bd23ae4", kill_on_drop: false }`
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking der v0.4.5
[INFO] [stderr]    Compiling p256-cortex-m4 v0.1.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cty v0.2.2
[INFO] [stderr]    Compiling p256-cortex-m4-sys v0.1.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking crypto-mac v0.11.1
[INFO] [stderr]     Checking ff v0.10.1
[INFO] [stderr]     Checking signature v1.3.2
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]     Checking group v0.10.0
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]     Checking zeroize v1.4.3
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.20s
[INFO] running `Command { std: "docker" "inspect" "8aea4e59beb95567ee8703c0ba02cdc05d6b8c84db9a3369fd57645f9bd23ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aea4e59beb95567ee8703c0ba02cdc05d6b8c84db9a3369fd57645f9bd23ae4", kill_on_drop: false }`
[INFO] [stdout] 8aea4e59beb95567ee8703c0ba02cdc05d6b8c84db9a3369fd57645f9bd23ae4
[INFO] checking p256-cortex-m4-0.1.0-alpha.6 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate p256-cortex-m4 0.1.0-alpha.6 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate p256-cortex-m4 0.1.0-alpha.6 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-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-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 36 packages
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding crypto-bigint v0.2.11 (latest: v0.5.5)
[INFO] [stderr]       Adding der v0.4.5 (latest: v0.7.9)
[INFO] [stderr]       Adding der_derive v0.4.1 (latest: v0.7.2)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ecdsa v0.12.4 (latest: v0.16.9)
[INFO] [stderr]       Adding elliptic-curve v0.10.6 (latest: v0.13.8)
[INFO] [stderr]       Adding ff v0.10.1 (latest: v0.13.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding group v0.10.0 (latest: v0.13.0)
[INFO] [stderr]       Adding hmac v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding p256 v0.9.0 (latest: v0.13.2)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding signature v1.3.2 (latest: v2.2.0)
[INFO] [stderr]       Adding subtle v2.4.1 (latest: v2.5.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding zeroize v1.4.3 (latest: v1.7.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc1b52eaf9a41404f1f6a155cd7af067bc5e382d093e245b400d1568d4443006
[INFO] running `Command { std: "docker" "start" "-a" "cc1b52eaf9a41404f1f6a155cd7af067bc5e382d093e245b400d1568d4443006", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc1b52eaf9a41404f1f6a155cd7af067bc5e382d093e245b400d1568d4443006", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc1b52eaf9a41404f1f6a155cd7af067bc5e382d093e245b400d1568d4443006", kill_on_drop: false }`
[INFO] [stdout] cc1b52eaf9a41404f1f6a155cd7af067bc5e382d093e245b400d1568d4443006
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 088c3e1a41670828ccee0142cbfe01715be26c03818382289e165218f0d4f925
[INFO] running `Command { std: "docker" "start" "-a" "088c3e1a41670828ccee0142cbfe01715be26c03818382289e165218f0d4f925", kill_on_drop: false }`
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling p256-cortex-m4-sys v0.1.0
[INFO] [stderr]     Checking der v0.4.5
[INFO] [stderr]     Checking cty v0.2.2
[INFO] [stderr]    Compiling p256-cortex-m4 v0.1.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking crypto-mac v0.11.1
[INFO] [stderr]     Checking ff v0.10.1
[INFO] [stderr]     Checking signature v1.3.2
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]     Checking group v0.10.0
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]     Checking zeroize v1.4.3
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.01s
[INFO] running `Command { std: "docker" "inspect" "088c3e1a41670828ccee0142cbfe01715be26c03818382289e165218f0d4f925", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "088c3e1a41670828ccee0142cbfe01715be26c03818382289e165218f0d4f925", kill_on_drop: false }`
[INFO] [stdout] 088c3e1a41670828ccee0142cbfe01715be26c03818382289e165218f0d4f925