[INFO] fetching crate estring 0.3.0...
[INFO] testing estring-0.3.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate estring 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate estring 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate estring 0.3.0
[INFO] tweaked toml for crates.io crate estring 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate estring 0.3.0 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 estring 0.3.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 99044b49a94acd76ce20205b315c1796619cdd8a7f8ccf6d2833b25686b2bd4f
[INFO] running `Command { std: "docker" "start" "-a" "99044b49a94acd76ce20205b315c1796619cdd8a7f8ccf6d2833b25686b2bd4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99044b49a94acd76ce20205b315c1796619cdd8a7f8ccf6d2833b25686b2bd4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99044b49a94acd76ce20205b315c1796619cdd8a7f8ccf6d2833b25686b2bd4f", kill_on_drop: false }`
[INFO] [stdout] 99044b49a94acd76ce20205b315c1796619cdd8a7f8ccf6d2833b25686b2bd4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f998fdcd36d34b046c894111ce0e2a21b03aaeef86172cd0504d5d4d6e437241
[INFO] running `Command { std: "docker" "start" "-a" "f998fdcd36d34b046c894111ce0e2a21b03aaeef86172cd0504d5d4d6e437241", kill_on_drop: false }`
[INFO] [stderr]    Compiling estring v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "f998fdcd36d34b046c894111ce0e2a21b03aaeef86172cd0504d5d4d6e437241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f998fdcd36d34b046c894111ce0e2a21b03aaeef86172cd0504d5d4d6e437241", kill_on_drop: false }`
[INFO] [stdout] f998fdcd36d34b046c894111ce0e2a21b03aaeef86172cd0504d5d4d6e437241
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ee475efb020c8427354e8104b2216ae74c4ca200c913e9a136292e71cf3737e9
[INFO] running `Command { std: "docker" "start" "-a" "ee475efb020c8427354e8104b2216ae74c4ca200c913e9a136292e71cf3737e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling estring v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `crate::structs`
[INFO] [stdout]    --> src/std/option.rs:43:16
[INFO] [stdout]     |
[INFO] [stdout]  43 |     use crate::structs::Pair;
[INFO] [stdout]     |                ^^^^^^^ could not find `structs` in the crate root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 125 | #[cfg(feature = "structs")]
[INFO] [stdout]     |       ------------------- the item is gated behind the `structs` feature
[INFO] [stdout] 126 | pub mod structs;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `estring` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ee475efb020c8427354e8104b2216ae74c4ca200c913e9a136292e71cf3737e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee475efb020c8427354e8104b2216ae74c4ca200c913e9a136292e71cf3737e9", kill_on_drop: false }`
[INFO] [stdout] ee475efb020c8427354e8104b2216ae74c4ca200c913e9a136292e71cf3737e9