[INFO] fetching crate fnr 0.1.0...
[INFO] checking fnr-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate fnr 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate fnr 0.1.0
[INFO] finished tweaking crates.io crate fnr 0.1.0
[INFO] tweaked toml for crates.io crate fnr 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fnr 0.1.0 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] crate crates.io crate fnr 0.1.0 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" "+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] 7d8f2455ce48826716d25e12bfb2cd64ce8858429061e738ba309372a14e118f
[INFO] running `Command { std: "docker" "start" "-a" "7d8f2455ce48826716d25e12bfb2cd64ce8858429061e738ba309372a14e118f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d8f2455ce48826716d25e12bfb2cd64ce8858429061e738ba309372a14e118f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d8f2455ce48826716d25e12bfb2cd64ce8858429061e738ba309372a14e118f", kill_on_drop: false }`
[INFO] [stdout] 7d8f2455ce48826716d25e12bfb2cd64ce8858429061e738ba309372a14e118f
[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] 1ebf977ec108f9ddff40883dbeb7faec7d3c8692a9f0543ab99470927e9ee37a
[INFO] running `Command { std: "docker" "start" "-a" "1ebf977ec108f9ddff40883dbeb7faec7d3c8692a9f0543ab99470927e9ee37a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling encoding_rs v0.8.29
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking bytecount v0.6.2
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking grep-matcher v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking termtree v0.2.3
[INFO] [stderr]     Checking text_io v0.1.9
[INFO] [stderr]     Checking predicates-tree v1.0.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking grep-regex v0.1.9
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking memmap2 v0.3.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking grep-cli v0.1.6
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking predicates v2.1.0
[INFO] [stderr]     Checking encoding_rs_io v0.1.7
[INFO] [stderr]     Checking grep-searcher v0.1.8
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking assert_cmd v1.0.8
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking grep-printer v0.1.6
[INFO] [stderr]     Checking grep v0.2.8
[INFO] [stderr]     Checking fnr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn search_timer(&self) -> StatSearchTimer {
[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] 86 |     fn search_timer(&self) -> StatSearchTimer<'_> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:233:5
[INFO] [stdout]     |
[INFO] [stdout] 233 | /     /// Include only files or directories matching pattern.
[INFO] [stdout] 234 | |     #[structopt(short = "I", long)]
[INFO] [stdout] 235 | |     include: Option<Vec<String>>,
[INFO] [stdout]     | |________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:237:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | /     /// Exclude files or directories matching pattern.
[INFO] [stdout] 238 | |     #[structopt(short = "E", long)]
[INFO] [stdout] 239 | |     exclude: Vec<String>,
[INFO] [stdout]     | |________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:254:5
[INFO] [stdout]     |
[INFO] [stdout] 254 | /     /// What to search for. Literal string or regular expression.
[INFO] [stdout] 255 | |     ///
[INFO] [stdout] 256 | |     /// For supported regular expression syntax, see:
[INFO] [stdout] 257 | |     /// https://docs.rs/regex/latest/regex/#syntax
[INFO] [stdout] 258 | |     #[structopt(name = "FIND", required = true)]
[INFO] [stdout] 259 | |     find: String,
[INFO] [stdout]     | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:261:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | /     /// What to replace it with.
[INFO] [stdout] 262 | |     ///
[INFO] [stdout] 263 | |     /// May contain numbered references to capture groups given in
[INFO] [stdout] 264 | |     /// FIND in the form $1, $2, etc.
[INFO] [stdout] 265 | |     #[structopt(name = "REPLACE", required = true)]
[INFO] [stdout] 266 | |     replace: String,
[INFO] [stdout]     | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:295:16
[INFO] [stdout]     |
[INFO] [stdout] 295 |     fn pattern(&self) -> Cow<str> {
[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] 295 |     fn pattern(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:314:21
[INFO] [stdout]     |
[INFO] [stdout] 314 |     fn search_paths(&self) -> Result<Cow<[PathBuf]>> {
[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] 314 |     fn search_paths(&self) -> Result<Cow<'_, [PathBuf]>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fnr` (bin "fnr") due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:86:21
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn search_timer(&self) -> StatSearchTimer {
[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] 86 |     fn search_timer(&self) -> StatSearchTimer<'_> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:233:5
[INFO] [stdout]     |
[INFO] [stdout] 233 | /     /// Include only files or directories matching pattern.
[INFO] [stdout] 234 | |     #[structopt(short = "I", long)]
[INFO] [stdout] 235 | |     include: Option<Vec<String>>,
[INFO] [stdout]     | |________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:237:5
[INFO] [stdout]     |
[INFO] [stdout] 237 | /     /// Exclude files or directories matching pattern.
[INFO] [stdout] 238 | |     #[structopt(short = "E", long)]
[INFO] [stdout] 239 | |     exclude: Vec<String>,
[INFO] [stdout]     | |________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:254:5
[INFO] [stdout]     |
[INFO] [stdout] 254 | /     /// What to search for. Literal string or regular expression.
[INFO] [stdout] 255 | |     ///
[INFO] [stdout] 256 | |     /// For supported regular expression syntax, see:
[INFO] [stdout] 257 | |     /// https://docs.rs/regex/latest/regex/#syntax
[INFO] [stdout] 258 | |     #[structopt(name = "FIND", required = true)]
[INFO] [stdout] 259 | |     find: String,
[INFO] [stdout]     | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:261:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | /     /// What to replace it with.
[INFO] [stdout] 262 | |     ///
[INFO] [stdout] 263 | |     /// May contain numbered references to capture groups given in
[INFO] [stdout] 264 | |     /// FIND in the form $1, $2, etc.
[INFO] [stdout] 265 | |     #[structopt(name = "REPLACE", required = true)]
[INFO] [stdout] 266 | |     replace: String,
[INFO] [stdout]     | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:295:16
[INFO] [stdout]     |
[INFO] [stdout] 295 |     fn pattern(&self) -> Cow<str> {
[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] 295 |     fn pattern(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/main.rs:314:21
[INFO] [stdout]     |
[INFO] [stdout] 314 |     fn search_paths(&self) -> Result<Cow<[PathBuf]>> {
[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] 314 |     fn search_paths(&self) -> Result<Cow<'_, [PathBuf]>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fnr` (bin "fnr" test) due to 4 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1ebf977ec108f9ddff40883dbeb7faec7d3c8692a9f0543ab99470927e9ee37a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ebf977ec108f9ddff40883dbeb7faec7d3c8692a9f0543ab99470927e9ee37a", kill_on_drop: false }`
[INFO] [stdout] 1ebf977ec108f9ddff40883dbeb7faec7d3c8692a9f0543ab99470927e9ee37a
