[INFO] fetching crate csv_cruncher 0.1.0...
[INFO] checking csv_cruncher-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate csv_cruncher 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate csv_cruncher 0.1.0
[INFO] finished tweaking crates.io crate csv_cruncher 0.1.0
[INFO] tweaked toml for crates.io crate csv_cruncher 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate csv_cruncher 0.1.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate csv_cruncher 0.1.0 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4ef365a25dfbc6fc86bd72b0777a9340770ea0b144d5dd51a7770f26021d0b5
[INFO] running `Command { std: "docker" "start" "-a" "f4ef365a25dfbc6fc86bd72b0777a9340770ea0b144d5dd51a7770f26021d0b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4ef365a25dfbc6fc86bd72b0777a9340770ea0b144d5dd51a7770f26021d0b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4ef365a25dfbc6fc86bd72b0777a9340770ea0b144d5dd51a7770f26021d0b5", kill_on_drop: false }`
[INFO] [stdout] f4ef365a25dfbc6fc86bd72b0777a9340770ea0b144d5dd51a7770f26021d0b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c67c730da64a7d2f8180bd47dcb5db3068612eb1a996629f86818ad97a931524
[INFO] running `Command { std: "docker" "start" "-a" "c67c730da64a7d2f8180bd47dcb5db3068612eb1a996629f86818ad97a931524", kill_on_drop: false }`
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[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `PyErr`
[INFO] [stdout]   --> src/lib.rs:65:65
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn test_crunch_csv() -> PyResult<()> {
[INFO] [stdout]    |                             ------------ expected `PyErr` because of this
[INFO] [stdout] ...
[INFO] [stdout] 65 |         let result = json::parse(&crunch_csv(path.to_string())?)?;
[INFO] [stdout]    |                      -------------------------------------------^ the trait `From<JsonError>` is not implemented for `PyErr`
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this can't be annotated with `?` because it has type `Result<_, JsonError>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]    = help: the following other types implement trait `From<T>`:
[INFO] [stdout]              `PyErr` implements `From<AddrParseError>`
[INFO] [stdout]              `PyErr` implements `From<DecodeUtf16Error>`
[INFO] [stdout]              `PyErr` implements `From<DowncastError<'_, '_>>`
[INFO] [stdout]              `PyErr` implements `From<DowncastIntoError<'_>>`
[INFO] [stdout]              `PyErr` implements `From<FromUtf16Error>`
[INFO] [stdout]              `PyErr` implements `From<FromUtf8Error>`
[INFO] [stdout]              `PyErr` implements `From<Infallible>`
[INFO] [stdout]              `PyErr` implements `From<IntoInnerError<W>>`
[INFO] [stdout]            and 12 others
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv_cruncher` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c67c730da64a7d2f8180bd47dcb5db3068612eb1a996629f86818ad97a931524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c67c730da64a7d2f8180bd47dcb5db3068612eb1a996629f86818ad97a931524", kill_on_drop: false }`
[INFO] [stdout] c67c730da64a7d2f8180bd47dcb5db3068612eb1a996629f86818ad97a931524