[INFO] fetching crate simple_file_logger 0.3.1...
[INFO] checking simple_file_logger-0.3.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate simple_file_logger 0.3.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate simple_file_logger 0.3.1 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 simple_file_logger 0.3.1
[INFO] finished tweaking crates.io crate simple_file_logger 0.3.1
[INFO] tweaked toml for crates.io crate simple_file_logger 0.3.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 58 packages
[INFO] [stderr]       Adding dirs v4.0.0 (latest: v5.0.1)
[INFO] [stderr]       Adding dirs-sys v0.3.7 (latest: v0.4.1)
[INFO] [stderr]       Adding flexi_logger v0.24.2 (latest: v0.28.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (latest: v0.50.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded flexi_logger v0.24.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 11b208578343dc8bb35f72ba194766d51677e0277846bab1f66a9ee25d77b805
[INFO] running `Command { std: "docker" "start" "-a" "11b208578343dc8bb35f72ba194766d51677e0277846bab1f66a9ee25d77b805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11b208578343dc8bb35f72ba194766d51677e0277846bab1f66a9ee25d77b805", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11b208578343dc8bb35f72ba194766d51677e0277846bab1f66a9ee25d77b805", kill_on_drop: false }`
[INFO] [stdout] 11b208578343dc8bb35f72ba194766d51677e0277846bab1f66a9ee25d77b805
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 35428f0c3d0ab879e90aeb8e707f2ad1a093fd539c6cb4b160e6f42df1be7cd6
[INFO] running `Command { std: "docker" "start" "-a" "35428f0c3d0ab879e90aeb8e707f2ad1a093fd539c6cb4b160e6f42df1be7cd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking flexi_logger v0.24.2
[INFO] [stderr]     Checking simple_file_logger v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |         $crate::init_logger($program_name, $crate::LogLevel::Info);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |         init_logger!("my_app");
[INFO] [stdout]    |         ---------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `init_logger` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let _ = $crate::init_logger($program_name, $crate::LogLevel::Info);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.90s
[INFO] running `Command { std: "docker" "inspect" "35428f0c3d0ab879e90aeb8e707f2ad1a093fd539c6cb4b160e6f42df1be7cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35428f0c3d0ab879e90aeb8e707f2ad1a093fd539c6cb4b160e6f42df1be7cd6", kill_on_drop: false }`
[INFO] [stdout] 35428f0c3d0ab879e90aeb8e707f2ad1a093fd539c6cb4b160e6f42df1be7cd6
[INFO] checking simple_file_logger-0.3.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate simple_file_logger 0.3.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate simple_file_logger 0.3.1 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 simple_file_logger 0.3.1
[INFO] finished tweaking crates.io crate simple_file_logger 0.3.1
[INFO] tweaked toml for crates.io crate simple_file_logger 0.3.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 532ce75d06eef5ac0c842d7e9474275a001d94edbbfbb19961fcb799ed6b24ec
[INFO] running `Command { std: "docker" "start" "-a" "532ce75d06eef5ac0c842d7e9474275a001d94edbbfbb19961fcb799ed6b24ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "532ce75d06eef5ac0c842d7e9474275a001d94edbbfbb19961fcb799ed6b24ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "532ce75d06eef5ac0c842d7e9474275a001d94edbbfbb19961fcb799ed6b24ec", kill_on_drop: false }`
[INFO] [stdout] 532ce75d06eef5ac0c842d7e9474275a001d94edbbfbb19961fcb799ed6b24ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 69ccb39e9db80bedc6ef6f62b32732ebce2bb5964fe9b06ec658bf2e95bac1d4
[INFO] running `Command { std: "docker" "start" "-a" "69ccb39e9db80bedc6ef6f62b32732ebce2bb5964fe9b06ec658bf2e95bac1d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking flexi_logger v0.24.2
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/flexi_logger-0.24.2/src/threads.rs:43:19
[INFO] [stdout]    |
[INFO] [stdout] 43 |     builder.spawn(move || {
[INFO] [stdout]    |             ----- ^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `Builder::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:381:5
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 43 |     builder.spawn(move || -> /* Type */ {
[INFO] [stdout]    |                           +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/flexi_logger-0.24.2/src/writers/file_log_writer/threads.rs:54:19
[INFO] [stdout]    |
[INFO] [stdout] 54 |     builder.spawn(move || {
[INFO] [stdout]    |             ----- ^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `Builder::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:381:5
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 54 |     builder.spawn(move || -> /* Type */ {
[INFO] [stdout]    |                           +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flexi_logger` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "69ccb39e9db80bedc6ef6f62b32732ebce2bb5964fe9b06ec658bf2e95bac1d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69ccb39e9db80bedc6ef6f62b32732ebce2bb5964fe9b06ec658bf2e95bac1d4", kill_on_drop: false }`
[INFO] [stdout] 69ccb39e9db80bedc6ef6f62b32732ebce2bb5964fe9b06ec658bf2e95bac1d4