[INFO] fetching crate scaly 0.0.37...
[INFO] checking scaly-0.0.37 against master#c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b for pr-104616
[INFO] extracting crate scaly 0.0.37 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate scaly 0.0.37 on toolchain c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scaly 0.0.37
[INFO] finished tweaking crates.io crate scaly 0.0.37
[INFO] tweaked toml for crates.io crate scaly 0.0.37 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4950ea2d95f73ad471b7845b48dde4e95c029aa209b50cf6231ad31f20466d20
[INFO] running `Command { std: "docker" "start" "-a" "4950ea2d95f73ad471b7845b48dde4e95c029aa209b50cf6231ad31f20466d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4950ea2d95f73ad471b7845b48dde4e95c029aa209b50cf6231ad31f20466d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4950ea2d95f73ad471b7845b48dde4e95c029aa209b50cf6231ad31f20466d20", kill_on_drop: false }`
[INFO] [stdout] 4950ea2d95f73ad471b7845b48dde4e95c029aa209b50cf6231ad31f20466d20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aaed7dc8398259d2b95c9cc3342ce9edd713bc0cf8f2e061cf1d9d85ffa99d51
[INFO] running `Command { std: "docker" "start" "-a" "aaed7dc8398259d2b95c9cc3342ce9edd713bc0cf8f2e061cf1d9d85ffa99d51", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking scaly v0.0.37 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/io/stream.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn write_byte(&mut self, u8) -> Result<(), IoError>;
[INFO] [stdout]   |                              ^^ help: try naming the parameter or explicitly ignoring it: `_: u8`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/io/stream.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn write_byte(&mut self, u8) -> Result<(), IoError>;
[INFO] [stdout]   |                              ^^ help: try naming the parameter or explicitly ignoring it: `_: u8`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/stream.rs:13:22
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub stream: *mut Stream
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub stream: *mut dyn Stream
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/console.rs:22:57
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn open_standard_output(_rp: *mut Page) -> *mut Stream {
[INFO] [stdout]    |                                                         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn open_standard_output(_rp: *mut Page) -> *mut dyn Stream {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/file.rs:13:81
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn open_read(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut Stream, IoError> {
[INFO] [stdout]    |                                                                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn open_read(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut dyn Stream, IoError> {
[INFO] [stdout]    |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/file.rs:33:82
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn open_write(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut Stream, IoError> {
[INFO] [stdout]    |                                                                                  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn open_write(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut dyn Stream, IoError> {
[INFO] [stdout]    |                                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/stream.rs:13:22
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub stream: *mut Stream
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub stream: *mut dyn Stream
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/console.rs:22:57
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn open_standard_output(_rp: *mut Page) -> *mut Stream {
[INFO] [stdout]    |                                                         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn open_standard_output(_rp: *mut Page) -> *mut dyn Stream {
[INFO] [stdout]    |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/file.rs:13:81
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn open_read(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut Stream, IoError> {
[INFO] [stdout]    |                                                                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn open_read(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut dyn Stream, IoError> {
[INFO] [stdout]    |                                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/io/file.rs:33:82
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn open_write(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut Stream, IoError> {
[INFO] [stdout]    |                                                                                  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn open_write(_pr: &Region, _rp: *mut Page, path: String) -> Result<*mut dyn Stream, IoError> {
[INFO] [stdout]    |                                                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `hash_code` is never read
[INFO] [stdout]   --> src/containers/hashset.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct Slot<T: Copy> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 62 |     value: T,
[INFO] [stdout] 63 |     hash_code: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Slot` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `hash_code` is never read
[INFO] [stdout]   --> src/containers/hashset.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct Slot<T: Copy> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 62 |     value: T,
[INFO] [stdout] 63 |     hash_code: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Slot` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "aaed7dc8398259d2b95c9cc3342ce9edd713bc0cf8f2e061cf1d9d85ffa99d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaed7dc8398259d2b95c9cc3342ce9edd713bc0cf8f2e061cf1d9d85ffa99d51", kill_on_drop: false }`
[INFO] [stdout] aaed7dc8398259d2b95c9cc3342ce9edd713bc0cf8f2e061cf1d9d85ffa99d51