[INFO] fetching crate mprober-lib 0.1.15...
[INFO] checking mprober-lib-0.1.15 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate mprober-lib 0.1.15 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate mprober-lib 0.1.15 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 mprober-lib 0.1.15
[INFO] finished tweaking crates.io crate mprober-lib 0.1.15
[INFO] tweaked toml for crates.io crate mprober-lib 0.1.15 written to /workspace/builds/worker-5-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 51 packages
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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 educe v0.5.11
[INFO] [stderr]   Downloaded page_size v0.6.0
[INFO] [stderr]   Downloaded enum-ordinalize-derive v4.3.1
[INFO] [stderr]   Downloaded enum-ordinalize v4.3.0
[INFO] [stderr]   Downloaded generic-array v1.0.0
[INFO] [stderr]   Downloaded scanner-rust v2.0.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] e3309fa96d022c1986161ce2856d345ca222f3a92d252fce21fcfcfd96532316
[INFO] running `Command { std: "docker" "start" "-a" "e3309fa96d022c1986161ce2856d345ca222f3a92d252fce21fcfcfd96532316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3309fa96d022c1986161ce2856d345ca222f3a92d252fce21fcfcfd96532316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3309fa96d022c1986161ce2856d345ca222f3a92d252fce21fcfcfd96532316", kill_on_drop: false }`
[INFO] [stdout] e3309fa96d022c1986161ce2856d345ca222f3a92d252fce21fcfcfd96532316
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1c0a683401c301ca54113443e61bb2d2884db3f5c8935d6e0abbaee420bb8926
[INFO] running `Command { std: "docker" "start" "-a" "1c0a683401c301ca54113443e61bb2d2884db3f5c8935d6e0abbaee420bb8926", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]    Compiling enum-ordinalize-derive v4.3.1
[INFO] [stderr]    Compiling enum-ordinalize v4.3.0
[INFO] [stderr]    Compiling educe v0.5.11
[INFO] [stderr]     Checking generic-array v1.0.0
[INFO] [stderr]     Checking scanner-rust v2.0.17
[INFO] [stderr]     Checking mprober-lib v0.1.15 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.07s
[INFO] running `Command { std: "docker" "inspect" "1c0a683401c301ca54113443e61bb2d2884db3f5c8935d6e0abbaee420bb8926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0a683401c301ca54113443e61bb2d2884db3f5c8935d6e0abbaee420bb8926", kill_on_drop: false }`
[INFO] [stdout] 1c0a683401c301ca54113443e61bb2d2884db3f5c8935d6e0abbaee420bb8926
[INFO] checking mprober-lib-0.1.15 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate mprober-lib 0.1.15 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate mprober-lib 0.1.15 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 mprober-lib 0.1.15
[INFO] finished tweaking crates.io crate mprober-lib 0.1.15
[INFO] tweaked toml for crates.io crate mprober-lib 0.1.15 written to /workspace/builds/worker-5-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 51 packages
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 25d48c45f4cbe857a7d7171aaa178f26a205b085475ad5f6802b7df3b42cc82d
[INFO] running `Command { std: "docker" "start" "-a" "25d48c45f4cbe857a7d7171aaa178f26a205b085475ad5f6802b7df3b42cc82d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25d48c45f4cbe857a7d7171aaa178f26a205b085475ad5f6802b7df3b42cc82d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25d48c45f4cbe857a7d7171aaa178f26a205b085475ad5f6802b7df3b42cc82d", kill_on_drop: false }`
[INFO] [stdout] 25d48c45f4cbe857a7d7171aaa178f26a205b085475ad5f6802b7df3b42cc82d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] c2c70e1984be763ca0fc2483502c2123ba14dce007b0a431ba03fe18e6feef46
[INFO] running `Command { std: "docker" "start" "-a" "c2c70e1984be763ca0fc2483502c2123ba14dce007b0a431ba03fe18e6feef46", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]    Compiling enum-ordinalize-derive v4.3.1
[INFO] [stderr]    Compiling enum-ordinalize v4.3.0
[INFO] [stderr]    Compiling educe v0.5.11
[INFO] [stderr]     Checking generic-array v1.0.0
[INFO] [stderr]     Checking scanner-rust v2.0.17
[INFO] [stderr]     Checking mprober-lib v0.1.15 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.39s
[INFO] running `Command { std: "docker" "inspect" "c2c70e1984be763ca0fc2483502c2123ba14dce007b0a431ba03fe18e6feef46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2c70e1984be763ca0fc2483502c2123ba14dce007b0a431ba03fe18e6feef46", kill_on_drop: false }`
[INFO] [stdout] c2c70e1984be763ca0fc2483502c2123ba14dce007b0a431ba03fe18e6feef46