[INFO] fetching crate emit-crash 0.1.0...
[INFO] checking emit-crash-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate emit-crash 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate emit-crash 0.1.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate emit-crash 0.1.0
[INFO] finished tweaking crates.io crate emit-crash 0.1.0
[INFO] tweaked toml for crates.io crate emit-crash 0.1.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding crossbeam-channel v0.4.4 (latest: v0.5.12)
[INFO] [stderr]       Adding crossbeam-utils v0.7.2 (latest: v0.8.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eecb25ac9726f3fcf560953f949648703430d742b5bddbbfe45adfdfcae2cb24
[INFO] running `Command { std: "docker" "start" "-a" "eecb25ac9726f3fcf560953f949648703430d742b5bddbbfe45adfdfcae2cb24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eecb25ac9726f3fcf560953f949648703430d742b5bddbbfe45adfdfcae2cb24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eecb25ac9726f3fcf560953f949648703430d742b5bddbbfe45adfdfcae2cb24", kill_on_drop: false }`
[INFO] [stdout] eecb25ac9726f3fcf560953f949648703430d742b5bddbbfe45adfdfcae2cb24
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89daacd6670ec85ee949a46b0c1cdbd1f36b39c51ad3a4b8e94f40a9160c50da
[INFO] running `Command { std: "docker" "start" "-a" "89daacd6670ec85ee949a46b0c1cdbd1f36b39c51ad3a4b8e94f40a9160c50da", kill_on_drop: false }`
[INFO] [stderr]     Checking emit-crash v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `emit_crash` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 8  | / macro_rules! emit_crash {
[INFO] [stdout] 9  | |     ($msg:expr) => ({
[INFO] [stdout] 10 | |         crate::EMIT_CHANNEL.0.send($msg.to_owned()).expect("carsh sender is drop");
[INFO] [stdout] 11 | |         panic!($msg)
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |     });
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_- the item `emit_crash` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 32 |       use super::emit_crash;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         panic!((&msg).to_string())
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |             emit_crash!("test carsh {:?}", 111);
[INFO] [stdout]    |             ----------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `emit_crash` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 17 |         panic!("{}", (&msg).to_string())
[INFO] [stdout]    |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "89daacd6670ec85ee949a46b0c1cdbd1f36b39c51ad3a4b8e94f40a9160c50da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89daacd6670ec85ee949a46b0c1cdbd1f36b39c51ad3a4b8e94f40a9160c50da", kill_on_drop: false }`
[INFO] [stdout] 89daacd6670ec85ee949a46b0c1cdbd1f36b39c51ad3a4b8e94f40a9160c50da
[INFO] checking emit-crash-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate emit-crash 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate emit-crash 0.1.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate emit-crash 0.1.0
[INFO] finished tweaking crates.io crate emit-crash 0.1.0
[INFO] tweaked toml for crates.io crate emit-crash 0.1.0 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding crossbeam-channel v0.4.4 (latest: v0.5.12)
[INFO] [stderr]       Adding crossbeam-utils v0.7.2 (latest: v0.8.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e289cb24c34932a29e2c63a751a13cc25900952239ed947dc1853c4e785b1bf
[INFO] running `Command { std: "docker" "start" "-a" "5e289cb24c34932a29e2c63a751a13cc25900952239ed947dc1853c4e785b1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e289cb24c34932a29e2c63a751a13cc25900952239ed947dc1853c4e785b1bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e289cb24c34932a29e2c63a751a13cc25900952239ed947dc1853c4e785b1bf", kill_on_drop: false }`
[INFO] [stdout] 5e289cb24c34932a29e2c63a751a13cc25900952239ed947dc1853c4e785b1bf
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 197412c4a6d70f1c2ef61e2bbacee6e95fac7f4593d99c30966ed0d673b3c2e3
[INFO] running `Command { std: "docker" "start" "-a" "197412c4a6d70f1c2ef61e2bbacee6e95fac7f4593d99c30966ed0d673b3c2e3", kill_on_drop: false }`
[INFO] [stderr]     Checking emit-crash v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `emit_crash` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 8  | / macro_rules! emit_crash {
[INFO] [stdout] 9  | |     ($msg:expr) => ({
[INFO] [stdout] 10 | |         crate::EMIT_CHANNEL.0.send($msg.to_owned()).expect("carsh sender is drop");
[INFO] [stdout] 11 | |         panic!($msg)
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |     });
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_- the item `emit_crash` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 32 |       use super::emit_crash;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:17:16
[INFO] [stdout]    |
[INFO] [stdout] 17 |         panic!((&msg).to_string())
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |             emit_crash!("test carsh {:?}", 111);
[INFO] [stdout]    |             ----------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `emit_crash` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 17 |         panic!("{}", (&msg).to_string())
[INFO] [stdout]    |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "197412c4a6d70f1c2ef61e2bbacee6e95fac7f4593d99c30966ed0d673b3c2e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "197412c4a6d70f1c2ef61e2bbacee6e95fac7f4593d99c30966ed0d673b3c2e3", kill_on_drop: false }`
[INFO] [stdout] 197412c4a6d70f1c2ef61e2bbacee6e95fac7f4593d99c30966ed0d673b3c2e3