[INFO] fetching crate persist-o-vec 0.3.1...
[INFO] testing persist-o-vec-0.3.1 against 1.91.0 for beta-1.92-2
[INFO] extracting crate persist-o-vec 0.3.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate persist-o-vec 0.3.1
[INFO] finished tweaking crates.io crate persist-o-vec 0.3.1
[INFO] tweaked toml for crates.io crate persist-o-vec 0.3.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate persist-o-vec 0.3.1 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c6bb9b8e04044c4ed3e7f5565e49df04329cea7e1bef50814fa7630b0d083d7
[INFO] running `Command { std: "docker" "start" "-a" "3c6bb9b8e04044c4ed3e7f5565e49df04329cea7e1bef50814fa7630b0d083d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c6bb9b8e04044c4ed3e7f5565e49df04329cea7e1bef50814fa7630b0d083d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c6bb9b8e04044c4ed3e7f5565e49df04329cea7e1bef50814fa7630b0d083d7", kill_on_drop: false }`
[INFO] [stdout] 3c6bb9b8e04044c4ed3e7f5565e49df04329cea7e1bef50814fa7630b0d083d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5f2e5593ca321d4f77c5dc560a98b33e2889f501fdc3f769b1e9ff92f4aaf92
[INFO] running `Command { std: "docker" "start" "-a" "a5f2e5593ca321d4f77c5dc560a98b33e2889f501fdc3f769b1e9ff92f4aaf92", kill_on_drop: false }`
[INFO] [stderr]    Compiling persist-o-vec v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:255:29
[INFO] [stdout]     |
[INFO] [stdout] 255 |                 if let Some(mut into_used) = into_used.as_mut() {
[INFO] [stdout]     |                             ----^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:285:25
[INFO] [stdout]     |
[INFO] [stdout] 285 |             if let Some(mut prev) = slot.prev.as_mut() {
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:286:29
[INFO] [stdout]     |
[INFO] [stdout] 286 |                 if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:293:32
[INFO] [stdout]     |
[INFO] [stdout] 293 |             } else if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                                ----^^^^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:311:17
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let mut slot = &mut self.entries[index];
[INFO] [stdout]     |                 ----^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:340:29
[INFO] [stdout]     |
[INFO] [stdout] 340 |                 if let Some(mut next) = (*slot).next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         let mut slot = &mut self.entries[index];
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:378:17
[INFO] [stdout]     |
[INFO] [stdout] 378 |     pub fn iter(&self) -> Iter<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] 378 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:395:21
[INFO] [stdout]     |
[INFO] [stdout] 395 |     pub fn iter_mut(&mut self) -> IterMut<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] 395 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "a5f2e5593ca321d4f77c5dc560a98b33e2889f501fdc3f769b1e9ff92f4aaf92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5f2e5593ca321d4f77c5dc560a98b33e2889f501fdc3f769b1e9ff92f4aaf92", kill_on_drop: false }`
[INFO] [stdout] a5f2e5593ca321d4f77c5dc560a98b33e2889f501fdc3f769b1e9ff92f4aaf92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2ea769f3029ea5208516ac830504bc2d0f4ea48ca9de5f77635627ad00ee268
[INFO] running `Command { std: "docker" "start" "-a" "e2ea769f3029ea5208516ac830504bc2d0f4ea48ca9de5f77635627ad00ee268", kill_on_drop: false }`
[INFO] [stderr]    Compiling bencher v0.1.5
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:255:29
[INFO] [stdout]     |
[INFO] [stdout] 255 |                 if let Some(mut into_used) = into_used.as_mut() {
[INFO] [stdout]     |                             ----^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:285:25
[INFO] [stdout]     |
[INFO] [stdout] 285 |             if let Some(mut prev) = slot.prev.as_mut() {
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:286:29
[INFO] [stdout]     |
[INFO] [stdout] 286 |                 if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:293:32
[INFO] [stdout]     |
[INFO] [stdout] 293 |             } else if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                                ----^^^^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:311:17
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let mut slot = &mut self.entries[index];
[INFO] [stdout]     |                 ----^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:340:29
[INFO] [stdout]     |
[INFO] [stdout] 340 |                 if let Some(mut next) = (*slot).next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         let mut slot = &mut self.entries[index];
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:378:17
[INFO] [stdout]     |
[INFO] [stdout] 378 |     pub fn iter(&self) -> Iter<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] 378 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:395:21
[INFO] [stdout]     |
[INFO] [stdout] 395 |     pub fn iter_mut(&mut self) -> IterMut<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] 395 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling persist-o-vec v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:255:29
[INFO] [stdout]     |
[INFO] [stdout] 255 |                 if let Some(mut into_used) = into_used.as_mut() {
[INFO] [stdout]     |                             ----^^^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:285:25
[INFO] [stdout]     |
[INFO] [stdout] 285 |             if let Some(mut prev) = slot.prev.as_mut() {
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:286:29
[INFO] [stdout]     |
[INFO] [stdout] 286 |                 if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:293:32
[INFO] [stdout]     |
[INFO] [stdout] 293 |             } else if let Some(mut next) = slot.next.as_mut() {
[INFO] [stdout]     |                                ----^^^^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:311:17
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let mut slot = &mut self.entries[index];
[INFO] [stdout]     |                 ----^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:340:29
[INFO] [stdout]     |
[INFO] [stdout] 340 |                 if let Some(mut next) = (*slot).next.as_mut() {
[INFO] [stdout]     |                             ----^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         let mut slot = &mut self.entries[index];
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:378:17
[INFO] [stdout]     |
[INFO] [stdout] 378 |     pub fn iter(&self) -> Iter<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] 378 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:395:21
[INFO] [stdout]     |
[INFO] [stdout] 395 |     pub fn iter_mut(&mut self) -> IterMut<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] 395 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 2.87s
[INFO] running `Command { std: "docker" "inspect" "e2ea769f3029ea5208516ac830504bc2d0f4ea48ca9de5f77635627ad00ee268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2ea769f3029ea5208516ac830504bc2d0f4ea48ca9de5f77635627ad00ee268", kill_on_drop: false }`
[INFO] [stdout] e2ea769f3029ea5208516ac830504bc2d0f4ea48ca9de5f77635627ad00ee268
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] adb35ae2621171503083e82eff79db45a1dc811f5ecf2e789b4df382e337e1be
[INFO] running `Command { std: "docker" "start" "-a" "adb35ae2621171503083e82eff79db45a1dc811f5ecf2e789b4df382e337e1be", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:255:29
[INFO] [stderr]     |
[INFO] [stderr] 255 |                 if let Some(mut into_used) = into_used.as_mut() {
[INFO] [stderr]     |                             ----^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:285:25
[INFO] [stderr]     |
[INFO] [stderr] 285 |             if let Some(mut prev) = slot.prev.as_mut() {
[INFO] [stderr]     |                         ----^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:286:29
[INFO] [stderr]     |
[INFO] [stderr] 286 |                 if let Some(mut next) = slot.next.as_mut() {
[INFO] [stderr]     |                             ----^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:293:32
[INFO] [stderr]     |
[INFO] [stderr] 293 |             } else if let Some(mut next) = slot.next.as_mut() {
[INFO] [stderr]     |                                ----^^^^
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:311:17
[INFO] [stderr]     |
[INFO] [stderr] 311 |             let mut slot = &mut self.entries[index];
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:340:29
[INFO] [stderr]     |
[INFO] [stderr] 340 |                 if let Some(mut next) = (*slot).next.as_mut() {
[INFO] [stderr]     |                             ----^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:356:13
[INFO] [stderr]     |
[INFO] [stderr] 356 |         let mut slot = &mut self.entries[index];
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:378:17
[INFO] [stderr]     |
[INFO] [stderr] 378 |     pub fn iter(&self) -> Iter<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] 378 |     pub fn iter(&self) -> Iter<'_, T> {
[INFO] [stderr]     |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:395:21
[INFO] [stderr]     |
[INFO] [stderr] 395 |     pub fn iter_mut(&mut self) -> IterMut<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] 395 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stderr]     |                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: `persist-o-vec` (lib) generated 9 warnings (run `cargo fix --lib -p persist-o-vec` to apply 9 suggestions)
[INFO] [stderr] warning: `persist-o-vec` (lib test) generated 9 warnings (9 duplicates)
[INFO] [stderr]     Finished `test` profile [optimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/persist_o_vec-aa7a6c21cc784aef)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test tests::get ... ok
[INFO] [stdout] test tests::get_mut ... ok
[INFO] [stdout] test tests::insert ... ok
[INFO] [stdout] test tests::index_validation ... ok
[INFO] [stdout] test tests::clear ... ok
[INFO] [stdout] test tests::iter_mut ... ok
[INFO] [stdout] test tests::iter ... ok
[INFO] [stdout] test tests::from_slice_reserve ... ok
[INFO] [stdout] test tests::iter_over_removed ... ok
[INFO] [stdout] test tests::insert_at_end ... ok
[INFO] [stdout] test tests::pop ... ok
[INFO] [stdout] test tests::push_to_full_then_pop_all ... ok
[INFO] [stdout] test tests::pst_remove_and_push ... ok
[INFO] [stdout] test tests::with_capacity ... ok
[INFO] [stdout] test tests::remove ... ok
[INFO] [stdout] test tests::panic_out_of_bounds - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests persist_o_vec
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "adb35ae2621171503083e82eff79db45a1dc811f5ecf2e789b4df382e337e1be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adb35ae2621171503083e82eff79db45a1dc811f5ecf2e789b4df382e337e1be", kill_on_drop: false }`
[INFO] [stdout] adb35ae2621171503083e82eff79db45a1dc811f5ecf2e789b4df382e337e1be
