[INFO] fetching crate panic_monitor 0.2.1...
[INFO] checking panic_monitor-0.2.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate panic_monitor 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate panic_monitor 0.2.1 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 panic_monitor 0.2.1
[INFO] finished tweaking crates.io crate panic_monitor 0.2.1
[INFO] tweaked toml for crates.io crate panic_monitor 0.2.1 written to /workspace/builds/worker-7-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 2 packages
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a9328a6e26f17627498166b4e852a725b1a1a86dac71e969517205b26470b69b
[INFO] running `Command { std: "docker" "start" "-a" "a9328a6e26f17627498166b4e852a725b1a1a86dac71e969517205b26470b69b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9328a6e26f17627498166b4e852a725b1a1a86dac71e969517205b26470b69b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9328a6e26f17627498166b4e852a725b1a1a86dac71e969517205b26470b69b", kill_on_drop: false }`
[INFO] [stdout] a9328a6e26f17627498166b4e852a725b1a1a86dac71e969517205b26470b69b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 3c2c8f05acd85ffe37a112c72279734c825d3816d161fae42e0feb459df36d73
[INFO] running `Command { std: "docker" "start" "-a" "3c2c8f05acd85ffe37a112c72279734c825d3816d161fae42e0feb459df36d73", kill_on_drop: false }`
[INFO] [stderr]     Checking panic_monitor v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "3c2c8f05acd85ffe37a112c72279734c825d3816d161fae42e0feb459df36d73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c2c8f05acd85ffe37a112c72279734c825d3816d161fae42e0feb459df36d73", kill_on_drop: false }`
[INFO] [stdout] 3c2c8f05acd85ffe37a112c72279734c825d3816d161fae42e0feb459df36d73
[INFO] checking panic_monitor-0.2.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate panic_monitor 0.2.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate panic_monitor 0.2.1 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 panic_monitor 0.2.1
[INFO] finished tweaking crates.io crate panic_monitor 0.2.1
[INFO] tweaked toml for crates.io crate panic_monitor 0.2.1 written to /workspace/builds/worker-7-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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b671f333a2e3872789df43baac0b5d69a3bbbef87d6e53bf84a8724cd16ed5a4
[INFO] running `Command { std: "docker" "start" "-a" "b671f333a2e3872789df43baac0b5d69a3bbbef87d6e53bf84a8724cd16ed5a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b671f333a2e3872789df43baac0b5d69a3bbbef87d6e53bf84a8724cd16ed5a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b671f333a2e3872789df43baac0b5d69a3bbbef87d6e53bf84a8724cd16ed5a4", kill_on_drop: false }`
[INFO] [stdout] b671f333a2e3872789df43baac0b5d69a3bbbef87d6e53bf84a8724cd16ed5a4
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c37a946cefe6770bc7d28efb02bebc88c1b8a22c57a101f12b9bf56d76d8ef2d
[INFO] running `Command { std: "docker" "start" "-a" "c37a946cefe6770bc7d28efb02bebc88c1b8a22c57a101f12b9bf56d76d8ef2d", kill_on_drop: false }`
[INFO] [stderr]     Checking panic_monitor v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> tests/test.rs:18:30
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let bad = thread::spawn( || { thread::sleep(Duration::from_millis(100)); panic!(); }).thread().id();
[INFO] [stdout]    |                              ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let bad = thread::spawn( || -> /* Type */ { thread::sleep(Duration::from_millis(100)); panic!(); }).thread().id();
[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 E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic_monitor` (test "test") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c37a946cefe6770bc7d28efb02bebc88c1b8a22c57a101f12b9bf56d76d8ef2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37a946cefe6770bc7d28efb02bebc88c1b8a22c57a101f12b9bf56d76d8ef2d", kill_on_drop: false }`
[INFO] [stdout] c37a946cefe6770bc7d28efb02bebc88c1b8a22c57a101f12b9bf56d76d8ef2d