[INFO] fetching crate marching-buffer 0.1.0...
[INFO] checking marching-buffer-0.1.0 against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] extracting crate marching-buffer 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate marching-buffer 0.1.0
[INFO] finished tweaking crates.io crate marching-buffer 0.1.0
[INFO] tweaked toml for crates.io crate marching-buffer 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate marching-buffer 0.1.0 on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c45463eeead9605165b6f852da906ba7a83bb2165e84f3bc286835b426b08971
[INFO] running `Command { std: "docker" "start" "-a" "c45463eeead9605165b6f852da906ba7a83bb2165e84f3bc286835b426b08971", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c45463eeead9605165b6f852da906ba7a83bb2165e84f3bc286835b426b08971", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c45463eeead9605165b6f852da906ba7a83bb2165e84f3bc286835b426b08971", kill_on_drop: false }`
[INFO] [stdout] c45463eeead9605165b6f852da906ba7a83bb2165e84f3bc286835b426b08971
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 909be7576aa7cdf25d95e95f8fa7c3001f8adace455346a16df98b9a275280d7
[INFO] running `Command { std: "docker" "start" "-a" "909be7576aa7cdf25d95e95f8fa7c3001f8adace455346a16df98b9a275280d7", kill_on_drop: false }`
[INFO] [stderr]     Checking marching-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn access(&self) -> ReaderAccess<T> {
[INFO] [stdout]     |                   ^^^^^     ---------------
[INFO] [stdout]     |                   |         |
[INFO] [stdout]     |                   |         the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   |         the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn access(&self) -> ReaderAccess<'_, T> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:115:23
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn try_access(&self) -> Option<ReaderAccess<T>> {
[INFO] [stdout]     |                       ^^^^^            ---------------
[INFO] [stdout]     |                       |                |
[INFO] [stdout]     |                       |                the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |                the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn try_access(&self) -> Option<ReaderAccess<'_, T>> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:229:19
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn access(&mut self) -> WriterAccess<T> {
[INFO] [stdout]     |                   ^^^^^^^^^     ---------------
[INFO] [stdout]     |                   |             |
[INFO] [stdout]     |                   |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn access(&mut self) -> WriterAccess<'_, T> {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:233:23
[INFO] [stdout]     |
[INFO] [stdout] 233 |     pub fn try_access(&mut self) -> Option<WriterAccess<T>> {
[INFO] [stdout]     |                       ^^^^^^^^^            ---------------
[INFO] [stdout]     |                       |                    |
[INFO] [stdout]     |                       |                    the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |                    the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 233 |     pub fn try_access(&mut self) -> Option<WriterAccess<'_, T>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn access(&self) -> ReaderAccess<T> {
[INFO] [stdout]     |                   ^^^^^     ---------------
[INFO] [stdout]     |                   |         |
[INFO] [stdout]     |                   |         the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   |         the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn access(&self) -> ReaderAccess<'_, T> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:115:23
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn try_access(&self) -> Option<ReaderAccess<T>> {
[INFO] [stdout]     |                       ^^^^^            ---------------
[INFO] [stdout]     |                       |                |
[INFO] [stdout]     |                       |                the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |                the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn try_access(&self) -> Option<ReaderAccess<'_, T>> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:229:19
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn access(&mut self) -> WriterAccess<T> {
[INFO] [stdout]     |                   ^^^^^^^^^     ---------------
[INFO] [stdout]     |                   |             |
[INFO] [stdout]     |                   |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                   this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 229 |     pub fn access(&mut self) -> WriterAccess<'_, T> {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:233:23
[INFO] [stdout]     |
[INFO] [stdout] 233 |     pub fn try_access(&mut self) -> Option<WriterAccess<T>> {
[INFO] [stdout]     |                       ^^^^^^^^^            ---------------
[INFO] [stdout]     |                       |                    |
[INFO] [stdout]     |                       |                    the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |                    the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 233 |     pub fn try_access(&mut self) -> Option<WriterAccess<'_, T>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "909be7576aa7cdf25d95e95f8fa7c3001f8adace455346a16df98b9a275280d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "909be7576aa7cdf25d95e95f8fa7c3001f8adace455346a16df98b9a275280d7", kill_on_drop: false }`
[INFO] [stdout] 909be7576aa7cdf25d95e95f8fa7c3001f8adace455346a16df98b9a275280d7
