[INFO] fetching crate sea-canal 0.3.0...
[INFO] checking sea-canal-0.3.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate sea-canal 0.3.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate sea-canal 0.3.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sea-canal 0.3.0
[INFO] finished tweaking crates.io crate sea-canal 0.3.0
[INFO] tweaked toml for crates.io crate sea-canal 0.3.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a08fb1ec28bb6a1597e6a8593d7edf8007d8a70b9c65c7f91272f2f41536d57f
[INFO] running `Command { std: "docker" "start" "-a" "a08fb1ec28bb6a1597e6a8593d7edf8007d8a70b9c65c7f91272f2f41536d57f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a08fb1ec28bb6a1597e6a8593d7edf8007d8a70b9c65c7f91272f2f41536d57f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08fb1ec28bb6a1597e6a8593d7edf8007d8a70b9c65c7f91272f2f41536d57f", kill_on_drop: false }`
[INFO] [stdout] a08fb1ec28bb6a1597e6a8593d7edf8007d8a70b9c65c7f91272f2f41536d57f
[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_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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e2cb833498d5a81c5585fb01889da5c65c9b106064c392a2fa777d76e385a12
[INFO] running `Command { std: "docker" "start" "-a" "2e2cb833498d5a81c5585fb01889da5c65c9b106064c392a2fa777d76e385a12", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking sea-canal v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/pattern.rs:166:13
[INFO] [stdout]     |
[INFO] [stdout] 166 |             try!(write!(fmt, "{}", elem));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/pattern.rs:163:17
[INFO] [stdout]     |
[INFO] [stdout] 163 |                 try!(write!(fmt, ", "));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/pattern.rs:166:13
[INFO] [stdout]     |
[INFO] [stdout] 166 |             try!(write!(fmt, "{}", elem));
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/pattern.rs:163:17
[INFO] [stdout]     |
[INFO] [stdout] 163 |                 try!(write!(fmt, ", "));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/pattern.rs:68:19
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fmt(&self, mut fmt: &mut Formatter) -> Result<(), Error> {
[INFO] [stdout]    |                   ----^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/pattern.rs:160:19
[INFO] [stdout]     |
[INFO] [stdout] 160 |     fn fmt(&self, mut fmt: &mut Formatter) -> Result<(), Error> {
[INFO] [stdout]     |                   ----^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/pattern.rs:68:19
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn fmt(&self, mut fmt: &mut Formatter) -> Result<(), Error> {
[INFO] [stdout]    |                   ----^^^
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/pattern.rs:160:19
[INFO] [stdout]     |
[INFO] [stdout] 160 |     fn fmt(&self, mut fmt: &mut Formatter) -> Result<(), Error> {
[INFO] [stdout]     |                   ----^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/bin/scnl.rs:39:16
[INFO] [stdout]    |
[INFO] [stdout] 39 |     for pat in analyzer.find_any_pattern(3) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     while let Some(pat) = analyzer.find_any_pattern(3) {
[INFO] [stdout]    |     ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 39 |     if let Some(pat) = analyzer.find_any_pattern(3) {
[INFO] [stdout]    |     ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/bin/scnl.rs:56:16
[INFO] [stdout]    |
[INFO] [stdout] 56 |     for pat in analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 56 |     while let Some(pat) = analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |     ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 56 |     if let Some(pat) = analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |     ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/bin/scnl.rs:39:16
[INFO] [stdout]    |
[INFO] [stdout] 39 |     for pat in analyzer.find_any_pattern(3) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     while let Some(pat) = analyzer.find_any_pattern(3) {
[INFO] [stdout]    |     ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 39 |     if let Some(pat) = analyzer.find_any_pattern(3) {
[INFO] [stdout]    |     ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/bin/scnl.rs:56:16
[INFO] [stdout]    |
[INFO] [stdout] 56 |     for pat in analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 56 |     while let Some(pat) = analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |     ~~~~~~~~~~~~~~~   ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 56 |     if let Some(pat) = analyzer.find_any_pattern_of_length(1) {
[INFO] [stdout]    |     ~~~~~~~~~~~~   ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "2e2cb833498d5a81c5585fb01889da5c65c9b106064c392a2fa777d76e385a12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e2cb833498d5a81c5585fb01889da5c65c9b106064c392a2fa777d76e385a12", kill_on_drop: false }`
[INFO] [stdout] 2e2cb833498d5a81c5585fb01889da5c65c9b106064c392a2fa777d76e385a12