[INFO] fetching crate mrecordlog 0.4.0...
[INFO] checking mrecordlog-0.4.0 against 1.95.0 for pr-155915
[INFO] extracting crate mrecordlog 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate mrecordlog 0.4.0
[INFO] finished tweaking crates.io crate mrecordlog 0.4.0
[INFO] tweaked toml for crates.io crate mrecordlog 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mrecordlog 0.4.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mrecordlog 0.4.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stdout] warning: struct `ArrayReader` is never constructed
[INFO] [stdout]   --> src/block_read_write.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct ArrayReader<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout]    |
[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/mem/queue.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn get_range(&self, bounds: impl RangeBounds<usize>) -> Cow<[u8]> {
[INFO] [stdout]    |                  ^^^^^ the lifetime is elided here          ^^^^^^^^^ the same lifetime is hidden 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] 71 |     fn get_range(&self, bounds: impl RangeBounds<usize>) -> Cow<'_, [u8]> {
[INFO] [stdout]    |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mem/queue.rs:194:21
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn range<R>(&self, range: R) -> impl Iterator<Item = (u64, Cow<[u8]>)> + '_
[INFO] [stdout]     |                     ^^^^^                                          ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]     |                     |                                              |
[INFO] [stdout]     |                     the lifetime is elided here                    the same lifetime is hidden 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] 194 |     pub fn range<R>(&self, range: R) -> impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_
[INFO] [stdout]     |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mem/queues.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         &self,
[INFO] [stdout]    |         ^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 47 |     ) -> Result<impl Iterator<Item = (u64, Cow<[u8]>)> + '_, MissingQueue>
[INFO] [stdout]    |                                            ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]    |                                            |
[INFO] [stdout]    |                                            the same lifetime is hidden 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] 47 |     ) -> Result<impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_, MissingQueue>
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/multi_record_log.rs:291:9
[INFO] [stdout]     |
[INFO] [stdout] 291 |         &self,
[INFO] [stdout]     |         ^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 294 |     ) -> Result<impl Iterator<Item = (u64, Cow<[u8]>)> + '_, MissingQueue>
[INFO] [stdout]     |                                            ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            the same lifetime is hidden 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] 294 |     ) -> Result<impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_, MissingQueue>
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/record.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn new(buffer: &[u8]) -> Result<MultiRecord, MultiRecordCorruption> {
[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] 126 |     pub fn new(buffer: &[u8]) -> Result<MultiRecord<'_>, MultiRecordCorruption> {
[INFO] [stdout]     |                                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/record.rs:139:34
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn new_unchecked(buffer: &[u8]) -> MultiRecord {
[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] 139 |     pub fn new_unchecked(buffer: &[u8]) -> MultiRecord<'_> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mem/queue.rs:71:18
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn get_range(&self, bounds: impl RangeBounds<usize>) -> Cow<[u8]> {
[INFO] [stdout]    |                  ^^^^^ the lifetime is elided here          ^^^^^^^^^ the same lifetime is hidden 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] 71 |     fn get_range(&self, bounds: impl RangeBounds<usize>) -> Cow<'_, [u8]> {
[INFO] [stdout]    |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.59s
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/mem/queue.rs:194:21
[INFO] [stdout]     |
[INFO] [stdout] 194 |     pub fn range<R>(&self, range: R) -> impl Iterator<Item = (u64, Cow<[u8]>)> + '_
[INFO] [stdout]     |                     ^^^^^                                          ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]     |                     |                                              |
[INFO] [stdout]     |                     the lifetime is elided here                    the same lifetime is hidden 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] 194 |     pub fn range<R>(&self, range: R) -> impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_
[INFO] [stdout]     |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/mem/queues.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         &self,
[INFO] [stdout]    |         ^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 47 |     ) -> Result<impl Iterator<Item = (u64, Cow<[u8]>)> + '_, MissingQueue>
[INFO] [stdout]    |                                            ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]    |                                            |
[INFO] [stdout]    |                                            the same lifetime is hidden 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] 47 |     ) -> Result<impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_, MissingQueue>
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/multi_record_log.rs:291:9
[INFO] [stdout]     |
[INFO] [stdout] 291 |         &self,
[INFO] [stdout]     |         ^^^^^ the lifetime is elided here
[INFO] [stdout] ...
[INFO] [stdout] 294 |     ) -> Result<impl Iterator<Item = (u64, Cow<[u8]>)> + '_, MissingQueue>
[INFO] [stdout]     |                                            ^^^^^^^^^     ^^ the same lifetime is elided here
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            the same lifetime is hidden 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] 294 |     ) -> Result<impl Iterator<Item = (u64, Cow<'_, [u8]>)> + '_, MissingQueue>
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/record.rs:126:24
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn new(buffer: &[u8]) -> Result<MultiRecord, MultiRecordCorruption> {
[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] 126 |     pub fn new(buffer: &[u8]) -> Result<MultiRecord<'_>, MultiRecordCorruption> {
[INFO] [stdout]     |                                                    ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/record.rs:139:34
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn new_unchecked(buffer: &[u8]) -> MultiRecord {
[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] 139 |     pub fn new_unchecked(buffer: &[u8]) -> MultiRecord<'_> {
[INFO] [stdout]     |                                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aafd2d516ba1093e4e6c3d4a8417edd04a902fecbce88782ab907add66f3e39a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aafd2d516ba1093e4e6c3d4a8417edd04a902fecbce88782ab907add66f3e39a", kill_on_drop: false }`
[INFO] [stdout] aafd2d516ba1093e4e6c3d4a8417edd04a902fecbce88782ab907add66f3e39a
