[INFO] fetching crate freds 0.1.2...
[INFO] checking freds-0.1.2 against master#94b72d6bebbddb5d17860914c4544f37365e988c for pr-122789
[INFO] extracting crate freds 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate freds 0.1.2 on toolchain 94b72d6bebbddb5d17860914c4544f37365e988c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate freds 0.1.2
[INFO] finished tweaking crates.io crate freds 0.1.2
[INFO] tweaked toml for crates.io crate freds 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36036f211f256cbb6bbe97688d3ec0c51343d2e4df329c110847e6f585379720
[INFO] running `Command { std: "docker" "start" "-a" "36036f211f256cbb6bbe97688d3ec0c51343d2e4df329c110847e6f585379720", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36036f211f256cbb6bbe97688d3ec0c51343d2e4df329c110847e6f585379720", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36036f211f256cbb6bbe97688d3ec0c51343d2e4df329c110847e6f585379720", kill_on_drop: false }`
[INFO] [stdout] 36036f211f256cbb6bbe97688d3ec0c51343d2e4df329c110847e6f585379720
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+94b72d6bebbddb5d17860914c4544f37365e988c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 459bf1ef26dbe4359a5a6c6596efddd6b2fa4c93d81aebbc3ef77c655f931daf
[INFO] running `Command { std: "docker" "start" "-a" "459bf1ef26dbe4359a5a6c6596efddd6b2fa4c93d81aebbc3ef77c655f931daf", kill_on_drop: false }`
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling async-trait v0.1.79
[INFO] [stderr]     Checking freds v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.15s
[INFO] running `Command { std: "docker" "inspect" "459bf1ef26dbe4359a5a6c6596efddd6b2fa4c93d81aebbc3ef77c655f931daf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "459bf1ef26dbe4359a5a6c6596efddd6b2fa4c93d81aebbc3ef77c655f931daf", kill_on_drop: false }`
[INFO] [stdout] 459bf1ef26dbe4359a5a6c6596efddd6b2fa4c93d81aebbc3ef77c655f931daf
[INFO] checking freds-0.1.2 against try#cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc for pr-122789
[INFO] extracting crate freds 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate freds 0.1.2 on toolchain cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate freds 0.1.2
[INFO] finished tweaking crates.io crate freds 0.1.2
[INFO] tweaked toml for crates.io crate freds 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 780274a432a2adb2ee17e848c619a271cc77c4fed1081a7f4047cb358d397dfd
[INFO] running `Command { std: "docker" "start" "-a" "780274a432a2adb2ee17e848c619a271cc77c4fed1081a7f4047cb358d397dfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "780274a432a2adb2ee17e848c619a271cc77c4fed1081a7f4047cb358d397dfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "780274a432a2adb2ee17e848c619a271cc77c4fed1081a7f4047cb358d397dfd", kill_on_drop: false }`
[INFO] [stdout] 780274a432a2adb2ee17e848c619a271cc77c4fed1081a7f4047cb358d397dfd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+cb4bf0ee9ea9dac86332c9e48c07269c7edc21dc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ef85c0ea94b1e0d01c2489abd9bdafb9e45cb7e786797ecf8d68ae72504b19a
[INFO] running `Command { std: "docker" "start" "-a" "9ef85c0ea94b1e0d01c2489abd9bdafb9e45cb7e786797ecf8d68ae72504b19a", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling async-trait v0.1.79
[INFO] [stderr]     Checking freds v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]   --> src/reader/mod.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Ok(&Element::Unknown)
[INFO] [stdout]    |             ^^^^----------------^
[INFO] [stdout]    |             |   |
[INFO] [stdout]    |             |   temporary value created here
[INFO] [stdout]    |             returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `freds` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9ef85c0ea94b1e0d01c2489abd9bdafb9e45cb7e786797ecf8d68ae72504b19a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ef85c0ea94b1e0d01c2489abd9bdafb9e45cb7e786797ecf8d68ae72504b19a", kill_on_drop: false }`
[INFO] [stdout] 9ef85c0ea94b1e0d01c2489abd9bdafb9e45cb7e786797ecf8d68ae72504b19a