[INFO] fetching crate nospin 0.2.4...
[INFO] testing nospin-0.2.4 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739
[INFO] extracting crate nospin 0.2.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate nospin 0.2.4
[INFO] finished tweaking crates.io crate nospin 0.2.4
[INFO] tweaked toml for crates.io crate nospin 0.2.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nospin 0.2.4 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nospin 0.2.4 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee34c5205718773c90d401bdf6bf305a8fc2c8fb753f2f7b78b3722014bac8bb
[INFO] running `Command { std: "docker" "start" "-a" "ee34c5205718773c90d401bdf6bf305a8fc2c8fb753f2f7b78b3722014bac8bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee34c5205718773c90d401bdf6bf305a8fc2c8fb753f2f7b78b3722014bac8bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee34c5205718773c90d401bdf6bf305a8fc2c8fb753f2f7b78b3722014bac8bb", kill_on_drop: false }`
[INFO] [stdout] ee34c5205718773c90d401bdf6bf305a8fc2c8fb753f2f7b78b3722014bac8bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3b4602c967f2d6f0607da52c7124aea560df58c6e25ef03222795211a4f2574
[INFO] running `Command { std: "docker" "start" "-a" "d3b4602c967f2d6f0607da52c7124aea560df58c6e25ef03222795211a4f2574", kill_on_drop: false }`
[INFO] [stderr]    Compiling nospin v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:286:17
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn read(&self) -> RwLockReadGuard<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] 286 |     pub fn read(&self) -> RwLockReadGuard<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:309:18
[INFO] [stdout]     |
[INFO] [stdout] 309 |     pub fn write(&self) -> RwLockWriteGuard<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] 309 |     pub fn write(&self) -> RwLockWriteGuard<'_, T> {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:317:29
[INFO] [stdout]     |
[INFO] [stdout] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<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] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<'_, T> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:362:21
[INFO] [stdout]     |
[INFO] [stdout] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<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] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<'_, T>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:450:22
[INFO] [stdout]     |
[INFO] [stdout] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<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] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<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] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:476:33
[INFO] [stdout]     |
[INFO] [stdout] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<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] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<'_, T>> {
[INFO] [stdout]     |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "d3b4602c967f2d6f0607da52c7124aea560df58c6e25ef03222795211a4f2574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3b4602c967f2d6f0607da52c7124aea560df58c6e25ef03222795211a4f2574", kill_on_drop: false }`
[INFO] [stdout] d3b4602c967f2d6f0607da52c7124aea560df58c6e25ef03222795211a4f2574
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 379b75d942450a1eb3aeb04859fe0408caef5938f7d04e132539bac2f066eac9
[INFO] running `Command { std: "docker" "start" "-a" "379b75d942450a1eb3aeb04859fe0408caef5938f7d04e132539bac2f066eac9", kill_on_drop: false }`
[INFO] [stderr]    Compiling nospin v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:286:17
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn read(&self) -> RwLockReadGuard<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] 286 |     pub fn read(&self) -> RwLockReadGuard<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:309:18
[INFO] [stdout]     |
[INFO] [stdout] 309 |     pub fn write(&self) -> RwLockWriteGuard<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] 309 |     pub fn write(&self) -> RwLockWriteGuard<'_, T> {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:317:29
[INFO] [stdout]     |
[INFO] [stdout] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<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] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<'_, T> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:362:21
[INFO] [stdout]     |
[INFO] [stdout] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<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] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<'_, T>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:450:22
[INFO] [stdout]     |
[INFO] [stdout] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<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] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<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] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:476:33
[INFO] [stdout]     |
[INFO] [stdout] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<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] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<'_, T>> {
[INFO] [stdout]     |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:286:17
[INFO] [stdout]     |
[INFO] [stdout] 286 |     pub fn read(&self) -> RwLockReadGuard<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] 286 |     pub fn read(&self) -> RwLockReadGuard<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:309:18
[INFO] [stdout]     |
[INFO] [stdout] 309 |     pub fn write(&self) -> RwLockWriteGuard<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] 309 |     pub fn write(&self) -> RwLockWriteGuard<'_, T> {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:317:29
[INFO] [stdout]     |
[INFO] [stdout] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<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] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<'_, T> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:362:21
[INFO] [stdout]     |
[INFO] [stdout] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<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] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<'_, T>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:450:22
[INFO] [stdout]     |
[INFO] [stdout] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<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] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:470:27
[INFO] [stdout]     |
[INFO] [stdout] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<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] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stdout]     |                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/rwlock.rs:476:33
[INFO] [stdout]     |
[INFO] [stdout] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<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] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<'_, T>> {
[INFO] [stdout]     |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "379b75d942450a1eb3aeb04859fe0408caef5938f7d04e132539bac2f066eac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "379b75d942450a1eb3aeb04859fe0408caef5938f7d04e132539bac2f066eac9", kill_on_drop: false }`
[INFO] [stdout] 379b75d942450a1eb3aeb04859fe0408caef5938f7d04e132539bac2f066eac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 36ad83edfdfdf5a01849ca1a6f5f26cabc253108f561ad7385a2b5dfcc4b020f
[INFO] running `Command { std: "docker" "start" "-a" "36ad83edfdfdf5a01849ca1a6f5f26cabc253108f561ad7385a2b5dfcc4b020f", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:286:17
[INFO] [stderr]     |
[INFO] [stderr] 286 |     pub fn read(&self) -> RwLockReadGuard<T> {
[INFO] [stderr]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 286 |     pub fn read(&self) -> RwLockReadGuard<'_, T> {
[INFO] [stderr]     |                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:309:18
[INFO] [stderr]     |
[INFO] [stderr] 309 |     pub fn write(&self) -> RwLockWriteGuard<T> {
[INFO] [stderr]     |                  ^^^^^     ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 309 |     pub fn write(&self) -> RwLockWriteGuard<'_, T> {
[INFO] [stderr]     |                                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:317:29
[INFO] [stderr]     |
[INFO] [stderr] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<T> {
[INFO] [stderr]     |                             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 317 |     pub fn upgradeable_read(&self) -> RwLockUpgradableGuard<'_, T> {
[INFO] [stderr]     |                                                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:362:21
[INFO] [stderr]     |
[INFO] [stderr] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<T>> {
[INFO] [stderr]     |                     ^^^^^            ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 362 |     pub fn try_read(&self) -> Option<RwLockReadGuard<'_, T>> {
[INFO] [stderr]     |                                                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:450:22
[INFO] [stderr]     |
[INFO] [stderr] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<T>> {
[INFO] [stderr]     |                      ^^^^^            ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 450 |     pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stderr]     |                                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:470:27
[INFO] [stderr]     |
[INFO] [stderr] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<T>> {
[INFO] [stderr]     |                           ^^^^^            ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 470 |     pub fn try_write_weak(&self) -> Option<RwLockWriteGuard<'_, T>> {
[INFO] [stderr]     |                                                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/rwlock.rs:476:33
[INFO] [stderr]     |
[INFO] [stderr] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<T>> {
[INFO] [stderr]     |                                 ^^^^^            ^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 476 |     pub fn try_upgradeable_read(&self) -> Option<RwLockUpgradableGuard<'_, T>> {
[INFO] [stderr]     |                                                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: `nospin` (lib) generated 7 warnings (run `cargo fix --lib -p nospin` to apply 7 suggestions)
[INFO] [stderr] warning: `nospin` (lib test) generated 7 warnings (7 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nospin-14a2f95986d60094)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test mutex::tests::smoke ... ok
[INFO] [stdout] test mutex::tests::lots_and_lots ... ok
[INFO] [stdout] test mutex::tests::test_mutex_arc_nested ... ok
[INFO] [stdout] test mutex::tests::test_into_inner ... ok
[INFO] [stdout] test mutex::tests::test_mutex_unsized ... ok
[INFO] [stdout] test mutex::tests::test_into_inner_drop ... ok
[INFO] [stdout] test once::tests::drop_occurs_and_skip_uninit_drop ... ok
[INFO] [stdout] test once::tests::get ... ok
[INFO] [stdout] test once::tests::call_once_test ... ok
[INFO] [stdout] test mutex::tests::test_mutex_force_lock ... ok
[INFO] [stdout] test mutex::tests::try_lock ... ok
[INFO] [stdout] test once::tests::init_constant ... ok
[INFO] [stdout] test once::tests::poll ... ok
[INFO] [stdout] test once::tests::smoke_once ... ok
[INFO] [stdout] test once::tests::smoke_once_value ... ok
[INFO] [stdout] test rwlock::tests::smoke ... ok
[INFO] [stdout] test rwlock::tests::test_force_write_unlock ... ok
[INFO] [stdout] test rwlock::tests::test_rwlock_unsized ... ok
[INFO] [stdout] test rwlock::tests::test_force_read_decrement ... ok
[INFO] [stdout] test once::tests::wait ... ok
[INFO] [stdout] test rwlock::tests::test_into_inner ... ok
[INFO] [stdout] test rwlock::tests::test_rw_try_read ... ok
[INFO] [stdout] test rwlock::tests::test_rwlock_try_write ... ok
[INFO] [stdout] test rwlock::tests::test_into_inner_drop ... ok
[INFO] [stdout] test rwlock::tests::test_upgrade_downgrade ... ok
[INFO] [stdout] test mutex::tests::test_mutex_arc_access_in_unwind ... ok
[INFO] [stdout] test once::tests::stampede_once ... ok
[INFO] [stdout] test once::tests::panic ... ok
[INFO] [stdout] test rwlock::tests::test_rw_access_in_unwind ... ok
[INFO] [stdout] test once::tests::try_call_once_err ... ok
[INFO] [stdout] test once::tests::get_no_wait ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nospin
[INFO] [stdout] 
[INFO] [stdout] running 27 tests
[INFO] [stdout] test src/lazy.rs - lazy::Lazy (line 17) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex<T>::try_lock (line 175) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex<T>::into_inner (line 86) ... ok
[INFO] [stdout] test src/lazy.rs - lazy::Lazy<T,F>::force (line 88) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex (line 15) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex<T>::new (line 63) ... ok
[INFO] [stdout] test src/once.rs - once::Once (line 17) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex<T>::get_mut (line 120) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::as_mut_ptr (line 244) ... ok
[INFO] [stdout] test src/once.rs - once::Once<T>::try_call_once (line 172) ... ok
[INFO] [stdout] test src/mutex.rs - mutex::Mutex<T>::lock (line 148) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockUpgradableGuard<'rwlock,T>::downgrade (line 626) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock (line 132) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockWriteGuard<'rwlock,T>::downgrade_to_upgradeable (line 714) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockWriteGuard<'rwlock,T>::downgrade (line 686) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockUpgradableGuard<'rwlock,T>::leak (line 656) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockUpgradableGuard<'rwlock,T>::try_upgrade (line 582) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockReadGuard<'rwlock,T>::leak (line 536) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::try_write (line 436) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::write (line 299) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::try_read (line 348) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::read (line 276) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::new (line 208) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockUpgradableGuard<'rwlock,T>::upgrade (line 566) ... ok
[INFO] [stdout] test src/once.rs - once::Once<T>::call_once (line 133) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLock<T>::get_mut (line 496) ... ok
[INFO] [stdout] test src/rwlock.rs - rwlock::RwLockWriteGuard<'rwlock,T>::leak (line 748) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 27 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.21s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 1.19s; merged doctests compilation took 0.98s
[INFO] running `Command { std: "docker" "inspect" "36ad83edfdfdf5a01849ca1a6f5f26cabc253108f561ad7385a2b5dfcc4b020f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36ad83edfdfdf5a01849ca1a6f5f26cabc253108f561ad7385a2b5dfcc4b020f", kill_on_drop: false }`
[INFO] [stdout] 36ad83edfdfdf5a01849ca1a6f5f26cabc253108f561ad7385a2b5dfcc4b020f
