[INFO] fetching crate crates-io-semverver 0.22.0...
[INFO] checking crates-io-semverver-0.22.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate crates-io-semverver 0.22.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate crates-io-semverver 0.22.0 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 crates-io-semverver 0.22.0
[INFO] finished tweaking crates.io crate crates-io-semverver 0.22.0
[INFO] tweaked toml for crates.io crate crates-io-semverver 0.22.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 52 packages
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[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 url v1.7.2 (latest: v2.5.0)
[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]     Blocking waiting for file lock on package cache
[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] 4de274284082491ee7842655325e3d1428d3e94e5734acb22ac541d0cd05f5f7
[INFO] running `Command { std: "docker" "start" "-a" "4de274284082491ee7842655325e3d1428d3e94e5734acb22ac541d0cd05f5f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4de274284082491ee7842655325e3d1428d3e94e5734acb22ac541d0cd05f5f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4de274284082491ee7842655325e3d1428d3e94e5734acb22ac541d0cd05f5f7", kill_on_drop: false }`
[INFO] [stdout] 4de274284082491ee7842655325e3d1428d3e94e5734acb22ac541d0cd05f5f7
[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] 264f5a2359f9f90f475f6619f42e02dbf06dd54b3956be43de1015ed71104284
[INFO] running `Command { std: "docker" "start" "-a" "264f5a2359f9f90f475f6619f42e02dbf06dd54b3956be43de1015ed71104284", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling curl-sys v0.4.72+curl-8.6.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]    Compiling curl v0.4.46
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking crates-io-semverver v0.22.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.43s
[INFO] running `Command { std: "docker" "inspect" "264f5a2359f9f90f475f6619f42e02dbf06dd54b3956be43de1015ed71104284", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "264f5a2359f9f90f475f6619f42e02dbf06dd54b3956be43de1015ed71104284", kill_on_drop: false }`
[INFO] [stdout] 264f5a2359f9f90f475f6619f42e02dbf06dd54b3956be43de1015ed71104284
[INFO] checking crates-io-semverver-0.22.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate crates-io-semverver 0.22.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate crates-io-semverver 0.22.0 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 crates-io-semverver 0.22.0
[INFO] finished tweaking crates.io crate crates-io-semverver 0.22.0
[INFO] tweaked toml for crates.io crate crates-io-semverver 0.22.0 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 52 packages
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[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 url v1.7.2 (latest: v2.5.0)
[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] a00aa9838b658fd2d98ed86fd3f9a1ec4bdd72a2fdef7c4d9b3d4dcd187602de
[INFO] running `Command { std: "docker" "start" "-a" "a00aa9838b658fd2d98ed86fd3f9a1ec4bdd72a2fdef7c4d9b3d4dcd187602de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a00aa9838b658fd2d98ed86fd3f9a1ec4bdd72a2fdef7c4d9b3d4dcd187602de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a00aa9838b658fd2d98ed86fd3f9a1ec4bdd72a2fdef7c4d9b3d4dcd187602de", kill_on_drop: false }`
[INFO] [stdout] a00aa9838b658fd2d98ed86fd3f9a1ec4bdd72a2fdef7c4d9b3d4dcd187602de
[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] 5b3d08b440aa3bec1482d82f5adb71b12203fa9ba2a9fcade8e353401fe0be06
[INFO] running `Command { std: "docker" "start" "-a" "5b3d08b440aa3bec1482d82f5adb71b12203fa9ba2a9fcade8e353401fe0be06", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling curl-sys v0.4.72+curl-8.6.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking gimli v0.28.1
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling curl v0.4.46
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking addr2line v0.21.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking crates-io-semverver v0.22.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.06s
[INFO] running `Command { std: "docker" "inspect" "5b3d08b440aa3bec1482d82f5adb71b12203fa9ba2a9fcade8e353401fe0be06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b3d08b440aa3bec1482d82f5adb71b12203fa9ba2a9fcade8e353401fe0be06", kill_on_drop: false }`
[INFO] [stdout] 5b3d08b440aa3bec1482d82f5adb71b12203fa9ba2a9fcade8e353401fe0be06