[INFO] fetching crate todo_using 0.2.2...
[INFO] checking todo_using-0.2.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate todo_using 0.2.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate todo_using 0.2.2 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 todo_using 0.2.2
[INFO] finished tweaking crates.io crate todo_using 0.2.2
[INFO] tweaked toml for crates.io crate todo_using 0.2.2 written to /workspace/builds/worker-0-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] 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-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] 5f4787b1cefe2365f44734d49a6e2c77de47e1c2eec6725b7eead915e778aed3
[INFO] running `Command { std: "docker" "start" "-a" "5f4787b1cefe2365f44734d49a6e2c77de47e1c2eec6725b7eead915e778aed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f4787b1cefe2365f44734d49a6e2c77de47e1c2eec6725b7eead915e778aed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f4787b1cefe2365f44734d49a6e2c77de47e1c2eec6725b7eead915e778aed3", kill_on_drop: false }`
[INFO] [stdout] 5f4787b1cefe2365f44734d49a6e2c77de47e1c2eec6725b7eead915e778aed3
[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] 179d52619cf9f4093246a61cd3bf02abf12cd03b6e29e3054bdf71851b9c2a61
[INFO] running `Command { std: "docker" "start" "-a" "179d52619cf9f4093246a61cd3bf02abf12cd03b6e29e3054bdf71851b9c2a61", kill_on_drop: false }`
[INFO] [stderr]     Checking todo_using v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "179d52619cf9f4093246a61cd3bf02abf12cd03b6e29e3054bdf71851b9c2a61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "179d52619cf9f4093246a61cd3bf02abf12cd03b6e29e3054bdf71851b9c2a61", kill_on_drop: false }`
[INFO] [stdout] 179d52619cf9f4093246a61cd3bf02abf12cd03b6e29e3054bdf71851b9c2a61
[INFO] checking todo_using-0.2.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate todo_using 0.2.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate todo_using 0.2.2 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 todo_using 0.2.2
[INFO] finished tweaking crates.io crate todo_using 0.2.2
[INFO] tweaked toml for crates.io crate todo_using 0.2.2 written to /workspace/builds/worker-0-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] 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] c51d8a44992c4f6a539f76890e4e9a201ad348db3aacedb6021c0a013ca054b0
[INFO] running `Command { std: "docker" "start" "-a" "c51d8a44992c4f6a539f76890e4e9a201ad348db3aacedb6021c0a013ca054b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c51d8a44992c4f6a539f76890e4e9a201ad348db3aacedb6021c0a013ca054b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c51d8a44992c4f6a539f76890e4e9a201ad348db3aacedb6021c0a013ca054b0", kill_on_drop: false }`
[INFO] [stdout] c51d8a44992c4f6a539f76890e4e9a201ad348db3aacedb6021c0a013ca054b0
[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] 1a19cc74cf237c83dfad56b41373109ff8ff359fa574a0a11ef274407f9f4801
[INFO] running `Command { std: "docker" "start" "-a" "1a19cc74cf237c83dfad56b41373109ff8ff359fa574a0a11ef274407f9f4801", kill_on_drop: false }`
[INFO] [stderr]     Checking todo_using v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:118:35
[INFO] [stdout]     |
[INFO] [stdout] 118 |             capture_panic_message(||{todo_using!(using = [arg1, arg2], unimplemented("Unimplemented Code {}", format_arg));}),
[INFO] [stdout]     |                                   ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Debug`
[INFO] [stdout] note: required by a bound in `capture_panic_message`
[INFO] [stdout]    --> src/lib.rs:107:33
[INFO] [stdout]     |
[INFO] [stdout] 107 |     fn capture_panic_message<R: Debug>(panicking_closure: impl FnOnce() -> R + UnwindSafe) -> String {
[INFO] [stdout]     |                                 ^^^^^ required by this bound in `capture_panic_message`
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 118 |             capture_panic_message(|| -> /* Type */{todo_using!(using = [arg1, arg2], unimplemented("Unimplemented Code {}", format_arg));}),
[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 `todo_using` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1a19cc74cf237c83dfad56b41373109ff8ff359fa574a0a11ef274407f9f4801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a19cc74cf237c83dfad56b41373109ff8ff359fa574a0a11ef274407f9f4801", kill_on_drop: false }`
[INFO] [stdout] 1a19cc74cf237c83dfad56b41373109ff8ff359fa574a0a11ef274407f9f4801