[INFO] fetching crate vanessa 0.1.2...
[INFO] checking vanessa-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate vanessa 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate vanessa 0.1.2
[INFO] finished tweaking crates.io crate vanessa 0.1.2
[INFO] tweaked toml for crates.io crate vanessa 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate vanessa 0.1.2 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c091e2c746d8ab8dadeadc08afbe3e9e13a4c5362413379b9879f0a21ab3e8c1
[INFO] running `Command { std: "docker" "start" "-a" "c091e2c746d8ab8dadeadc08afbe3e9e13a4c5362413379b9879f0a21ab3e8c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c091e2c746d8ab8dadeadc08afbe3e9e13a4c5362413379b9879f0a21ab3e8c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c091e2c746d8ab8dadeadc08afbe3e9e13a4c5362413379b9879f0a21ab3e8c1", kill_on_drop: false }`
[INFO] [stdout] c091e2c746d8ab8dadeadc08afbe3e9e13a4c5362413379b9879f0a21ab3e8c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef95862236f4249beef221f51c85cc57e6a2799cc06b5f4252bcbeba1f1e2bbe
[INFO] running `Command { std: "docker" "start" "-a" "ef95862236f4249beef221f51c85cc57e6a2799cc06b5f4252bcbeba1f1e2bbe", kill_on_drop: false }`
[INFO] [stderr]     Checking vanessa v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/log.rs:224:18
[INFO] [stdout]     |
[INFO] [stdout] 224 |     file.replace(PathBuf::from_str("latest.log").unwrap());
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/log.rs:381:24
[INFO] [stdout]     |
[INFO] [stdout] 381 |     pub fn new(prefix: &str, tlevel: LogLevel, flevel: LogLevel) -> Logger {
[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] 381 |     pub fn new(prefix: &str, tlevel: LogLevel, flevel: LogLevel) -> Logger<'_> {
[INFO] [stdout]     |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/log.rs:391:26
[INFO] [stdout]     |
[INFO] [stdout] 391 |     pub fn quick(prefix: &str) -> Logger {
[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] 391 |     pub fn quick(prefix: &str) -> Logger<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/log.rs:224:18
[INFO] [stdout]     |
[INFO] [stdout] 224 |     file.replace(PathBuf::from_str("latest.log").unwrap());
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/log.rs:381:24
[INFO] [stdout]     |
[INFO] [stdout] 381 |     pub fn new(prefix: &str, tlevel: LogLevel, flevel: LogLevel) -> Logger {
[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] 381 |     pub fn new(prefix: &str, tlevel: LogLevel, flevel: LogLevel) -> Logger<'_> {
[INFO] [stdout]     |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/log.rs:391:26
[INFO] [stdout]     |
[INFO] [stdout] 391 |     pub fn quick(prefix: &str) -> Logger {
[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] 391 |     pub fn quick(prefix: &str) -> Logger<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vanessa` (lib) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `vanessa` (lib test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ef95862236f4249beef221f51c85cc57e6a2799cc06b5f4252bcbeba1f1e2bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef95862236f4249beef221f51c85cc57e6a2799cc06b5f4252bcbeba1f1e2bbe", kill_on_drop: false }`
[INFO] [stdout] ef95862236f4249beef221f51c85cc57e6a2799cc06b5f4252bcbeba1f1e2bbe