[INFO] fetching crate sever 1.1.2...
[INFO] checking sever-1.1.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate sever 1.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate sever 1.1.2 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 sever 1.1.2
[INFO] finished tweaking crates.io crate sever 1.1.2
[INFO] tweaked toml for crates.io crate sever 1.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate sever 1.1.2 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 cpuid-bool v0.1.2
[INFO] [stderr]   Downloaded recolored v1.9.3
[INFO] [stderr]   Downloaded indenter v0.3.0
[INFO] [stderr]   Downloaded futures-sink v0.3.6
[INFO] [stderr]   Downloaded sha2 v0.9.1
[INFO] [stderr]   Downloaded owo-colors v1.1.3
[INFO] [stderr]   Downloaded futures-executor v0.3.6
[INFO] [stderr]   Downloaded futures-channel v0.3.6
[INFO] [stderr]   Downloaded futures-io v0.3.6
[INFO] [stderr]   Downloaded futures-macro v0.3.6
[INFO] [stderr]   Downloaded miniz_oxide v0.4.2
[INFO] [stderr]   Downloaded backtrace v0.3.51
[INFO] [stderr]   Downloaded eyre v0.6.1
[INFO] [stderr]   Downloaded color-eyre v0.5.6
[INFO] [stderr]   Downloaded futures-util v0.3.6
[INFO] [stderr]   Downloaded futures-task v0.3.6
[INFO] [stderr]   Downloaded futures v0.3.6
[INFO] [stderr]   Downloaded pin-project-internal v0.4.26
[INFO] [stderr]   Downloaded pin-project v0.4.26
[INFO] [stderr]   Downloaded futures-core v0.3.6
[INFO] [stderr]   Downloaded pin-project-lite v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ed1b1b024330c55040d15f3d06074d2cf50fd99cf132438ed4047dcd9f0237ee
[INFO] running `Command { std: "docker" "start" "-a" "ed1b1b024330c55040d15f3d06074d2cf50fd99cf132438ed4047dcd9f0237ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed1b1b024330c55040d15f3d06074d2cf50fd99cf132438ed4047dcd9f0237ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed1b1b024330c55040d15f3d06074d2cf50fd99cf132438ed4047dcd9f0237ee", kill_on_drop: false }`
[INFO] [stdout] ed1b1b024330c55040d15f3d06074d2cf50fd99cf132438ed4047dcd9f0237ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b23dc021d21e6b0517309392b1ae5f005add8d90c5693e8233af6e4dd7d4acb9
[INFO] running `Command { std: "docker" "start" "-a" "b23dc021d21e6b0517309392b1ae5f005add8d90c5693e8233af6e4dd7d4acb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.26
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking futures-core v0.3.6
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking futures-sink v0.3.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking futures-io v0.3.6
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking futures-channel v0.3.6
[INFO] [stderr]     Checking futures-task v0.3.6
[INFO] [stderr]     Checking gimli v0.22.0
[INFO] [stderr]    Compiling eyre v0.6.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking indenter v0.3.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling sever v1.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking owo-colors v1.1.3
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking pin-project-lite v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking recolored v1.9.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking addr2line v0.13.0
[INFO] [stderr]     Checking backtrace v0.3.51
[INFO] [stderr]     Checking color-eyre v0.5.6
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pin-project v0.4.26
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking futures-executor v0.3.6
[INFO] [stderr]     Checking futures v0.3.6
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/ext.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     #[pin_project]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `::pin_project::__private::__PinProjectInternalDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/ext.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     #[pin_project]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `::pin_project::__private::__PinProjectInternalDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.93s
[INFO] running `Command { std: "docker" "inspect" "b23dc021d21e6b0517309392b1ae5f005add8d90c5693e8233af6e4dd7d4acb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b23dc021d21e6b0517309392b1ae5f005add8d90c5693e8233af6e4dd7d4acb9", kill_on_drop: false }`
[INFO] [stdout] b23dc021d21e6b0517309392b1ae5f005add8d90c5693e8233af6e4dd7d4acb9