[INFO] fetching crate blackbox_core 0.1.1...
[INFO] checking blackbox_core-0.1.1 against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] extracting crate blackbox_core 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate blackbox_core 0.1.1
[INFO] finished tweaking crates.io crate blackbox_core 0.1.1
[INFO] tweaked toml for crates.io crate blackbox_core 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate blackbox_core 0.1.1 on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 101 packages to latest compatible versions
[INFO] [stderr]       Adding colored v2.2.0 (available: v3.1.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linkme-impl v0.3.36
[INFO] [stderr]   Downloaded linkme v0.3.36
[INFO] [stderr]   Downloaded blackbox_cast v0.1.1
[INFO] [stderr]   Downloaded blackbox_cast_codegen v0.1.1
[INFO] [stderr]   Downloaded blackbox_core_codegen v0.1.1
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4849754df8a498e258b77a30cb33dfdadda66a159e31ff1273b850889013d8e4
[INFO] running `Command { std: "docker" "start" "-a" "4849754df8a498e258b77a30cb33dfdadda66a159e31ff1273b850889013d8e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4849754df8a498e258b77a30cb33dfdadda66a159e31ff1273b850889013d8e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4849754df8a498e258b77a30cb33dfdadda66a159e31ff1273b850889013d8e4", kill_on_drop: false }`
[INFO] [stdout] 4849754df8a498e258b77a30cb33dfdadda66a159e31ff1273b850889013d8e4
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9375e429fbbfc6790df211454ce41c241d478452eb6b354a1d17230212f6b484
[INFO] running `Command { std: "docker" "start" "-a" "9375e429fbbfc6790df211454ce41c241d478452eb6b354a1d17230212f6b484", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling rand_core v0.10.1
[INFO] [stderr]    Compiling cpufeatures v0.3.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling linkme-impl v0.3.36
[INFO] [stderr]    Compiling linkme v0.3.36
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking colored v2.2.0
[INFO] [stderr]     Checking chacha20 v0.10.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]    Compiling rand v0.10.1
[INFO] [stderr]    Compiling uuid v1.23.1
[INFO] [stderr]     Checking chrono v0.4.44
[INFO] [stderr]    Compiling blackbox_cast_codegen v0.1.1
[INFO] [stderr]    Compiling blackbox_core_codegen v0.1.1
[INFO] [stderr]     Checking blackbox_cast v0.1.1
[INFO] [stderr]     Checking blackbox_core v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/lazy.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lazy<T>(Arc<T>);
[INFO] [stdout]   |            ----    ^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/reference_mut.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn as_ref(&self) -> RefMutRef<T> {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn as_ref(&self) -> RefMutRef<'_, T> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/reference_mut.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn as_mut(&self) -> RefMutRefMut<T> {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn as_mut(&self) -> RefMutRefMut<'_, T> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/lazy.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Lazy<T>(Arc<T>);
[INFO] [stdout]   |            ----    ^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/reference_mut.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn as_ref(&self) -> RefMutRef<T> {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn as_ref(&self) -> RefMutRef<'_, T> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/reference_mut.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn as_mut(&self) -> RefMutRefMut<T> {
[INFO] [stdout]    |                   ^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn as_mut(&self) -> RefMutRefMut<'_, T> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.64s
[INFO] running `Command { std: "docker" "inspect" "9375e429fbbfc6790df211454ce41c241d478452eb6b354a1d17230212f6b484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9375e429fbbfc6790df211454ce41c241d478452eb6b354a1d17230212f6b484", kill_on_drop: false }`
[INFO] [stdout] 9375e429fbbfc6790df211454ce41c241d478452eb6b354a1d17230212f6b484
