[INFO] fetching crate snazy 0.52.1...
[INFO] checking snazy-0.52.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate snazy 0.52.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate snazy 0.52.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate snazy 0.52.1
[INFO] finished tweaking crates.io crate snazy 0.52.1
[INFO] tweaked toml for crates.io crate snazy 0.52.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate snazy 0.52.1 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_complete v4.4.1
[INFO] [stderr]   Downloaded color-print-proc-macro v0.3.5
[INFO] [stderr]   Downloaded color-print v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43eefbfc7c14d4a7e03334b2737a00120cb05da60a857389f2d5e5bc6091023e
[INFO] running `Command { std: "docker" "start" "-a" "43eefbfc7c14d4a7e03334b2737a00120cb05da60a857389f2d5e5bc6091023e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43eefbfc7c14d4a7e03334b2737a00120cb05da60a857389f2d5e5bc6091023e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43eefbfc7c14d4a7e03334b2737a00120cb05da60a857389f2d5e5bc6091023e", kill_on_drop: false }`
[INFO] [stdout] 43eefbfc7c14d4a7e03334b2737a00120cb05da60a857389f2d5e5bc6091023e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 745a09e6e37eb42bf8327c873a9b8325bd0944d9c3e83fc35547ed6282f7ff84
[INFO] running `Command { std: "docker" "start" "-a" "745a09e6e37eb42bf8327c873a9b8325bd0944d9c3e83fc35547ed6282f7ff84", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling rustix v0.38.13
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]     Checking linux-raw-sys v0.4.7
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking anstyle-parse v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking fastrand v2.0.0
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]     Checking aho-corasick v1.1.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]     Checking chrono v0.4.31
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking tempfile v3.8.0
[INFO] [stderr]    Compiling color-print-proc-macro v0.3.5
[INFO] [stderr]     Checking color-print v0.3.5
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking clap v4.4.3
[INFO] [stderr]     Checking clap_complete v4.4.1
[INFO] [stderr]     Checking snazy v0.52.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `colouring` is never read
[INFO] [stdout]   --> src/config.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Config {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub colouring: bool,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `colouring` is never read
[INFO] [stdout]   --> src/config.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Config {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub colouring: bool,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Config` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.33s
[INFO] running `Command { std: "docker" "inspect" "745a09e6e37eb42bf8327c873a9b8325bd0944d9c3e83fc35547ed6282f7ff84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "745a09e6e37eb42bf8327c873a9b8325bd0944d9c3e83fc35547ed6282f7ff84", kill_on_drop: false }`
[INFO] [stdout] 745a09e6e37eb42bf8327c873a9b8325bd0944d9c3e83fc35547ed6282f7ff84
[INFO] checking snazy-0.52.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate snazy 0.52.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate snazy 0.52.1 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate snazy 0.52.1
[INFO] finished tweaking crates.io crate snazy 0.52.1
[INFO] tweaked toml for crates.io crate snazy 0.52.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate snazy 0.52.1 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1e2b19a6318ef57c07f15c3a3c6f092f9fa72c269d32bdce9a6d0aa7f7518d6
[INFO] running `Command { std: "docker" "start" "-a" "c1e2b19a6318ef57c07f15c3a3c6f092f9fa72c269d32bdce9a6d0aa7f7518d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1e2b19a6318ef57c07f15c3a3c6f092f9fa72c269d32bdce9a6d0aa7f7518d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1e2b19a6318ef57c07f15c3a3c6f092f9fa72c269d32bdce9a6d0aa7f7518d6", kill_on_drop: false }`
[INFO] [stdout] c1e2b19a6318ef57c07f15c3a3c6f092f9fa72c269d32bdce9a6d0aa7f7518d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e823757a6f29fcfeaefc59f1ad15bf776d063694129f38cf76eb5670eb8c3b16
[INFO] running `Command { std: "docker" "start" "-a" "e823757a6f29fcfeaefc59f1ad15bf776d063694129f38cf76eb5670eb8c3b16", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]     Checking anstyle v1.0.3
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rustix v0.38.13
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling memchr v2.6.3
[INFO] [stderr]     Checking linux-raw-sys v0.4.7
[INFO] [stderr]     Checking anstyle-parse v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking fastrand v2.0.0
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking anstream v0.5.0
[INFO] [stderr]     Checking clap_builder v4.4.2
[INFO] [stderr]     Checking aho-corasick v1.1.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]     Checking chrono v0.4.31
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking tempfile v3.8.0
[INFO] [stderr]    Compiling color-print-proc-macro v0.3.5
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking color-print v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]     Checking clap v4.4.3
[INFO] [stderr]     Checking clap_complete v4.4.1
[INFO] [stderr]     Checking snazy v0.52.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed for `Result<File, _>`
[INFO] [stdout]    --> src/parse.rs:263:9
[INFO] [stdout]     |
[INFO] [stdout] 263 |       let file = File::open(filename).map_err(|e| {
[INFO] [stdout]     |  _________^^^^___-
[INFO] [stdout] 264 | |         eprintln!("file {filename}, {e}");
[INFO] [stdout] 265 | |         std::process::exit(1);
[INFO] [stdout] 266 | |     });
[INFO] [stdout]     | |______- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider giving `file` an explicit type, where the type for type parameter `F` is specified
[INFO] [stdout]     |
[INFO] [stdout] 263 |     let file: Result<File, _> = File::open(filename).map_err(|e| {
[INFO] [stdout]     |             +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed for `Result<File, _>`
[INFO] [stdout]    --> src/parse.rs:263:9
[INFO] [stdout]     |
[INFO] [stdout] 263 |       let file = File::open(filename).map_err(|e| {
[INFO] [stdout]     |  _________^^^^___-
[INFO] [stdout] 264 | |         eprintln!("file {filename}, {e}");
[INFO] [stdout] 265 | |         std::process::exit(1);
[INFO] [stdout] 266 | |     });
[INFO] [stdout]     | |______- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider giving `file` an explicit type, where the type for type parameter `F` is specified
[INFO] [stdout]     |
[INFO] [stdout] 263 |     let file: Result<File, _> = File::open(filename).map_err(|e| {
[INFO] [stdout]     |             +++++++++++++++++
[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 E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `snazy` (bin "snazy") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `snazy` (bin "snazy" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e823757a6f29fcfeaefc59f1ad15bf776d063694129f38cf76eb5670eb8c3b16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e823757a6f29fcfeaefc59f1ad15bf776d063694129f38cf76eb5670eb8c3b16", kill_on_drop: false }`
[INFO] [stdout] e823757a6f29fcfeaefc59f1ad15bf776d063694129f38cf76eb5670eb8c3b16