[INFO] cloning repository https://github.com/henriklaxhuber/perspektiv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/henriklaxhuber/perspektiv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenriklaxhuber%2Fperspektiv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenriklaxhuber%2Fperspektiv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88d93c1c6cfa34162515e5619c651e3c7f8711b5
[INFO] checking henriklaxhuber/perspektiv against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhenriklaxhuber%2Fperspektiv" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/henriklaxhuber/perspektiv on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/henriklaxhuber/perspektiv
[INFO] finished tweaking git repo https://github.com/henriklaxhuber/perspektiv
[INFO] tweaked toml for git repo https://github.com/henriklaxhuber/perspektiv written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/henriklaxhuber/perspektiv 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gobject-sys v0.6.0
[INFO] [stderr]   Downloaded pango-sys v0.6.0
[INFO] [stderr]   Downloaded glib-sys v0.6.0
[INFO] [stderr]   Downloaded gio-sys v0.6.0
[INFO] [stderr]   Downloaded dirs v1.0.3
[INFO] [stderr]   Downloaded stderrlog v0.4.1
[INFO] [stderr]   Downloaded cairo-rs v0.4.1
[INFO] [stderr]   Downloaded nix v0.9.0
[INFO] [stderr]   Downloaded gio v0.4.1
[INFO] [stderr]   Downloaded gtk v0.4.1
[INFO] [stderr]   Downloaded alsa v0.2.0
[INFO] [stderr]   Downloaded gdk v0.8.0
[INFO] [stderr]   Downloaded gdk-sys v0.6.0
[INFO] [stderr]   Downloaded gtk-sys v0.6.0
[INFO] [stderr]   Downloaded gdk-pixbuf v0.4.0
[INFO] [stderr]   Downloaded cairo-sys-rs v0.6.0
[INFO] [stderr]   Downloaded glib v0.5.0
[INFO] [stderr]   Downloaded pango v0.4.0
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.6.0
[INFO] [stderr]   Downloaded atk-sys v0.6.0
[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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47d7f2a3996b11b6aa0275afb6228299d3c089a8fb58ae5791b4e24eee363426
[INFO] running `Command { std: "docker" "start" "-a" "47d7f2a3996b11b6aa0275afb6228299d3c089a8fb58ae5791b4e24eee363426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47d7f2a3996b11b6aa0275afb6228299d3c089a8fb58ae5791b4e24eee363426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d7f2a3996b11b6aa0275afb6228299d3c089a8fb58ae5791b4e24eee363426", kill_on_drop: false }`
[INFO] [stdout] 47d7f2a3996b11b6aa0275afb6228299d3c089a8fb58ae5791b4e24eee363426
[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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a272812a751dcc3bb3a1f03032c5714aeff2651deb64e5d2f96313a1e4c44808
[INFO] running `Command { std: "docker" "start" "-a" "a272812a751dcc3bb3a1f03032c5714aeff2651deb64e5d2f96313a1e4c44808", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.12
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling gio v0.4.1
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling cairo-rs v0.4.1
[INFO] [stderr]    Compiling gdk-pixbuf v0.4.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling gdk v0.8.0
[INFO] [stderr]     Checking c_vec v1.2.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling gtk v0.4.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]    Compiling glib-sys v0.6.0
[INFO] [stderr]    Compiling gobject-sys v0.6.0
[INFO] [stderr]    Compiling gio-sys v0.6.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.6.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.6.0
[INFO] [stderr]    Compiling pango-sys v0.6.0
[INFO] [stderr]    Compiling gdk-sys v0.6.0
[INFO] [stderr]    Compiling atk-sys v0.6.0
[INFO] [stderr]    Compiling gtk-sys v0.6.0
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]    Compiling syn v0.14.5
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking dirs v1.0.3
[INFO] [stderr]     Checking stderrlog v0.4.1
[INFO] [stderr]     Checking glib v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking pango v0.4.0
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]     Checking threlm v0.1.0 (/opt/rustwide/workdir/threlm)
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]   --> threlm/src/lib.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::{clone::Clone, ops::Deref, sync, sync::Arc};
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/af4a5a13a15fa0c60e06321077ef452f769b42fd/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Clone` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]   --> threlm/src/lib.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |         &mut *(&self.0 as *const T as *mut T)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]    = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `threlm` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "a272812a751dcc3bb3a1f03032c5714aeff2651deb64e5d2f96313a1e4c44808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a272812a751dcc3bb3a1f03032c5714aeff2651deb64e5d2f96313a1e4c44808", kill_on_drop: false }`
[INFO] [stdout] a272812a751dcc3bb3a1f03032c5714aeff2651deb64e5d2f96313a1e4c44808