[INFO] fetching crate remain 0.2.15...
[INFO] testing remain-0.2.15 against 1.90.0 for beta-1.91-3
[INFO] extracting crate remain 0.2.15 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate remain 0.2.15
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate remain 0.2.15
[INFO] tweaked toml for crates.io crate remain 0.2.15 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate remain 0.2.15 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate remain 0.2.15 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ryu v1.0.19
[INFO] [stderr]   Downloaded target-triple v0.1.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.94
[INFO] [stderr]   Downloaded glob v0.3.2
[INFO] [stderr]   Downloaded dissimilar v1.0.10
[INFO] [stderr]   Downloaded unicode-ident v1.0.17
[INFO] [stderr]   Downloaded trybuild v1.0.103
[INFO] [stderr]   Downloaded syn v2.0.99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa898bf88a19c194413f7db34c72875478f9fb52db7511b9ef16cb8a6528dbdd
[INFO] running `Command { std: "docker" "start" "-a" "fa898bf88a19c194413f7db34c72875478f9fb52db7511b9ef16cb8a6528dbdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa898bf88a19c194413f7db34c72875478f9fb52db7511b9ef16cb8a6528dbdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa898bf88a19c194413f7db34c72875478f9fb52db7511b9ef16cb8a6528dbdd", kill_on_drop: false }`
[INFO] [stdout] fa898bf88a19c194413f7db34c72875478f9fb52db7511b9ef16cb8a6528dbdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be15c303d7e82002c1c491a29a9f5b1c8189f68054406c4cfaaa29705531693d
[INFO] running `Command { std: "docker" "start" "-a" "be15c303d7e82002c1c491a29a9f5b1c8189f68054406c4cfaaa29705531693d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]    Compiling remain v0.2.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/atom.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn iter_atoms(string: &str) -> AtomIter {
[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] 70 | pub fn iter_atoms(string: &str) -> AtomIter<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.34s
[INFO] running `Command { std: "docker" "inspect" "be15c303d7e82002c1c491a29a9f5b1c8189f68054406c4cfaaa29705531693d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be15c303d7e82002c1c491a29a9f5b1c8189f68054406c4cfaaa29705531693d", kill_on_drop: false }`
[INFO] [stdout] be15c303d7e82002c1c491a29a9f5b1c8189f68054406c4cfaaa29705531693d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 630752a8588186413bb90d01ab03357366959658d09aef72e87fd0d3cc2a02c8
[INFO] running `Command { std: "docker" "start" "-a" "630752a8588186413bb90d01ab03357366959658d09aef72e87fd0d3cc2a02c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling winnow v0.7.3
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling target-triple v0.1.4
[INFO] [stderr]    Compiling rustversion v1.0.19
[INFO] [stderr]    Compiling ryu v1.0.19
[INFO] [stderr]    Compiling dissimilar v1.0.10
[INFO] [stderr]    Compiling glob v0.3.2
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling toml_edit v0.22.24
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]    Compiling remain v0.2.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/atom.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn iter_atoms(string: &str) -> AtomIter {
[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] 70 | pub fn iter_atoms(string: &str) -> AtomIter<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling toml v0.8.20
[INFO] [stderr]    Compiling trybuild v1.0.103
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/unstable.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_hygiene, stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `remain` (test "unstable") due to 1 previous error
[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/atom.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn iter_atoms(string: &str) -> AtomIter {
[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] 70 | pub fn iter_atoms(string: &str) -> AtomIter<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "630752a8588186413bb90d01ab03357366959658d09aef72e87fd0d3cc2a02c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "630752a8588186413bb90d01ab03357366959658d09aef72e87fd0d3cc2a02c8", kill_on_drop: false }`
[INFO] [stdout] 630752a8588186413bb90d01ab03357366959658d09aef72e87fd0d3cc2a02c8