[INFO] fetching crate on-off-sequence-output 0.2.0...
[INFO] checking on-off-sequence-output-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate on-off-sequence-output 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate on-off-sequence-output 0.2.0 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] started tweaking crates.io crate on-off-sequence-output 0.2.0
[INFO] finished tweaking crates.io crate on-off-sequence-output 0.2.0
[INFO] tweaked toml for crates.io crate on-off-sequence-output 0.2.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate on-off-sequence-output 0.2.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.8
[INFO] [stderr]   Downloaded stm32f4xx-hal v0.7.0
[INFO] [stderr]   Downloaded panic-semihosting v0.5.6
[INFO] [stderr]   Downloaded volatile-register v0.2.0
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.14
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.3.7
[INFO] [stderr]   Downloaded cortex-m v0.7.2
[INFO] [stderr]   Downloaded cast v0.2.6
[INFO] [stderr]   Downloaded aligned v0.3.4
[INFO] [stderr]   Downloaded embedded-hal v0.2.5
[INFO] [stderr]   Downloaded stm32f4 v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c75ce7266f8c2c946cfd6f95334edf176b1e7fc86222359c59e435d2aa89afcf
[INFO] running `Command { std: "docker" "start" "-a" "c75ce7266f8c2c946cfd6f95334edf176b1e7fc86222359c59e435d2aa89afcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c75ce7266f8c2c946cfd6f95334edf176b1e7fc86222359c59e435d2aa89afcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c75ce7266f8c2c946cfd6f95334edf176b1e7fc86222359c59e435d2aa89afcf", kill_on_drop: false }`
[INFO] [stdout] c75ce7266f8c2c946cfd6f95334edf176b1e7fc86222359c59e435d2aa89afcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 255d2cbee02813bcb086f8f04b3e13ed2f56c33e25b025ed446c3c908982b0b2
[INFO] running `Command { std: "docker" "start" "-a" "255d2cbee02813bcb086f8f04b3e13ed2f56c33e25b025ed446c3c908982b0b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling cortex-m v0.7.2
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cortex-m-rt v0.6.14
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling stm32f4 v0.10.0
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.7
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking on-off-sequence-output v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking panic-semihosting v0.5.6
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking stm32f4xx-hal v0.7.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.67s
[INFO] running `Command { std: "docker" "inspect" "255d2cbee02813bcb086f8f04b3e13ed2f56c33e25b025ed446c3c908982b0b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "255d2cbee02813bcb086f8f04b3e13ed2f56c33e25b025ed446c3c908982b0b2", kill_on_drop: false }`
[INFO] [stdout] 255d2cbee02813bcb086f8f04b3e13ed2f56c33e25b025ed446c3c908982b0b2
[INFO] checking on-off-sequence-output-0.2.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate on-off-sequence-output 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate on-off-sequence-output 0.2.0 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] started tweaking crates.io crate on-off-sequence-output 0.2.0
[INFO] finished tweaking crates.io crate on-off-sequence-output 0.2.0
[INFO] tweaked toml for crates.io crate on-off-sequence-output 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate on-off-sequence-output 0.2.0 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b89499f9ac21da02b170f57d645ff2149deb19a767544639c0e075483ba34463
[INFO] running `Command { std: "docker" "start" "-a" "b89499f9ac21da02b170f57d645ff2149deb19a767544639c0e075483ba34463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b89499f9ac21da02b170f57d645ff2149deb19a767544639c0e075483ba34463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b89499f9ac21da02b170f57d645ff2149deb19a767544639c0e075483ba34463", kill_on_drop: false }`
[INFO] [stdout] b89499f9ac21da02b170f57d645ff2149deb19a767544639c0e075483ba34463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a494c459921e687626ca0f77d2b25bcff04879942e78655905e6204374d32ee1
[INFO] running `Command { std: "docker" "start" "-a" "a494c459921e687626ca0f77d2b25bcff04879942e78655905e6204374d32ee1", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling cortex-m v0.7.2
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]    Compiling cortex-m v0.6.7
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling cortex-m-rt v0.6.14
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.7
[INFO] [stderr]    Compiling stm32f4 v0.10.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking on-off-sequence-output v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking panic-semihosting v0.5.6
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking stm32f4xx-hal v0.7.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.53s
[INFO] running `Command { std: "docker" "inspect" "a494c459921e687626ca0f77d2b25bcff04879942e78655905e6204374d32ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a494c459921e687626ca0f77d2b25bcff04879942e78655905e6204374d32ee1", kill_on_drop: false }`
[INFO] [stdout] a494c459921e687626ca0f77d2b25bcff04879942e78655905e6204374d32ee1