[INFO] fetching crate melodeon 0.5.16...
[INFO] checking melodeon-0.5.16 against 1.95.0 for pr-155915
[INFO] extracting crate melodeon 0.5.16 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate melodeon 0.5.16
[INFO] finished tweaking crates.io crate melodeon 0.5.16
[INFO] tweaked toml for crates.io crate melodeon 0.5.16 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate melodeon 0.5.16 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate melodeon 0.5.16 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_generator v2.2.1
[INFO] [stderr]   Downloaded rayon-core v1.9.3
[INFO] [stderr]   Downloaded pest_meta v2.2.1
[INFO] [stderr]   Downloaded pest_derive v2.2.1
[INFO] [stderr]   Downloaded lexpr-macros v0.2.1
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[INFO] [stderr]   Downloaded ucd-trie v0.1.4
[INFO] [stderr]   Downloaded derive_arbitrary v1.1.3
[INFO] [stderr]   Downloaded rayon v1.5.3
[INFO] [stderr]   Downloaded argh_shared v0.1.8
[INFO] [stderr]   Downloaded memmap v0.7.0
[INFO] [stderr]   Downloaded catvec v0.1.6
[INFO] [stderr]   Downloaded defmac v0.2.1
[INFO] [stderr]   Downloaded argh_derive v0.1.8
[INFO] [stderr]   Downloaded anyhow v1.0.61
[INFO] [stderr]   Downloaded lexpr v0.2.6
[INFO] [stderr]   Downloaded ethnum v1.2.2
[INFO] [stderr]   Downloaded pest v2.2.1
[INFO] [stderr]   Downloaded argh v0.1.8
[INFO] [stderr]   Downloaded imbl v1.0.1
[INFO] [stderr]   Downloaded arbitrary v1.1.3
[INFO] [stderr]   Downloaded semver v1.0.13
[INFO] [stderr]   Downloaded blake3 v1.3.1
[INFO] [stderr]   Downloaded honggfuzz v0.5.54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c79b316b7e6f446885a0f1d4de95b1c94f18e30ba3f967543017c51d3c857eab
[INFO] running `Command { std: "docker" "start" "-a" "c79b316b7e6f446885a0f1d4de95b1c94f18e30ba3f967543017c51d3c857eab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c79b316b7e6f446885a0f1d4de95b1c94f18e30ba3f967543017c51d3c857eab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c79b316b7e6f446885a0f1d4de95b1c94f18e30ba3f967543017c51d3c857eab", kill_on_drop: false }`
[INFO] [stdout] c79b316b7e6f446885a0f1d4de95b1c94f18e30ba3f967543017c51d3c857eab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bd418e5889eb8e49f773b047b52dff513513b9365317f39e281eaf5711e4916
[INFO] running `Command { std: "docker" "start" "-a" "5bd418e5889eb8e49f773b047b52dff513513b9365317f39e281eaf5711e4916", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.131
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling ucd-trie v0.1.4
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking lock_api v0.4.7
[INFO] [stderr]    Compiling blake3 v1.3.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling argh_shared v0.1.8
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling anyhow v1.0.61
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking defmac v0.2.1
[INFO] [stderr]     Checking ethnum v1.2.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking parking_lot_core v0.9.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking ahash v0.7.6
[INFO] [stderr]    Compiling lexpr-macros v0.2.1
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking lexpr v0.2.6
[INFO] [stderr]     Checking internment v0.5.6
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.2
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]    Compiling derive_arbitrary v1.1.3
[INFO] [stderr]    Compiling argh_derive v0.1.8
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking arbitrary v1.1.3
[INFO] [stderr]     Checking imbl v1.0.1
[INFO] [stderr]    Compiling thiserror v1.0.32
[INFO] [stderr]    Compiling pest v2.2.1
[INFO] [stderr]     Checking snailquote v0.3.1
[INFO] [stderr]     Checking catvec v0.1.6
[INFO] [stderr]     Checking argh v0.1.8
[INFO] [stderr]    Compiling pest_meta v2.2.1
[INFO] [stderr]    Compiling pest_generator v2.2.1
[INFO] [stderr]    Compiling pest_derive v2.2.1
[INFO] [stderr]     Checking melodeon v0.5.16 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/grammar/parser.rs:284:40
[INFO] [stdout]     |
[INFO] [stdout] 284 |         .fold(String::from(""), |a, b| (a.tap_mut(|a| a.push_str(b))));
[INFO] [stdout]     |                                        ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 284 -         .fold(String::from(""), |a, b| (a.tap_mut(|a| a.push_str(b))));
[INFO] [stdout] 284 +         .fold(String::from(""), |a, b| a.tap_mut(|a| a.push_str(b)) );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/grammar/parser.rs:284:40
[INFO] [stdout]     |
[INFO] [stdout] 284 |         .fold(String::from(""), |a, b| (a.tap_mut(|a| a.push_str(b))));
[INFO] [stdout]     |                                        ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 284 -         .fold(String::from(""), |a, b| (a.tap_mut(|a| a.push_str(b))));
[INFO] [stdout] 284 +         .fold(String::from(""), |a, b| a.tap_mut(|a| a.push_str(b)) );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> src/codegen.rs:132:24
[INFO] [stdout]     |
[INFO] [stdout] 132 |         ExprInner::Exp(k, base, exp) => [
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> src/codegen.rs:132:24
[INFO] [stdout]     |
[INFO] [stdout] 132 |         ExprInner::Exp(k, base, exp) => [
[INFO] [stdout]     |                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |     pub fn subtract(&self, other: &Self) -> Cow<Self> {
[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] 237 |     pub fn subtract(&self, other: &Self) -> Cow<'_, Self> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:456:18
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn index(&self, idx: Option<&ConstExpr<CVar>>) -> Option<Cow<Self>> {
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn index(&self, idx: Option<&ConstExpr<CVar>>) -> Option<Cow<'_, Self>> {
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:780:26
[INFO] [stdout]     |
[INFO] [stdout] 780 |     pub fn try_to_vector(&self) -> Option<Cow<List<Self>>> {
[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] 780 |     pub fn try_to_vector(&self) -> Option<Cow<'_, List<Self>>> {
[INFO] [stdout]     |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |     pub fn subtract(&self, other: &Self) -> Cow<Self> {
[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] 237 |     pub fn subtract(&self, other: &Self) -> Cow<'_, Self> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:456:18
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn index(&self, idx: Option<&ConstExpr<CVar>>) -> Option<Cow<Self>> {
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 456 |     pub fn index(&self, idx: Option<&ConstExpr<CVar>>) -> Option<Cow<'_, Self>> {
[INFO] [stdout]     |                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/typesys/types.rs:780:26
[INFO] [stdout]     |
[INFO] [stdout] 780 |     pub fn try_to_vector(&self) -> Option<Cow<List<Self>>> {
[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] 780 |     pub fn try_to_vector(&self) -> Option<Cow<'_, List<Self>>> {
[INFO] [stdout]     |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.82s
[INFO] running `Command { std: "docker" "inspect" "5bd418e5889eb8e49f773b047b52dff513513b9365317f39e281eaf5711e4916", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bd418e5889eb8e49f773b047b52dff513513b9365317f39e281eaf5711e4916", kill_on_drop: false }`
[INFO] [stdout] 5bd418e5889eb8e49f773b047b52dff513513b9365317f39e281eaf5711e4916
