[INFO] fetching crate prsm 0.1.0...
[INFO] checking prsm-0.1.0 against try#50f413885985a8b0a0b6ca0766a0aedd45304953 for pr-155657-1
[INFO] extracting crate prsm 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate prsm 0.1.0
[INFO] finished tweaking crates.io crate prsm 0.1.0
[INFO] tweaked toml for crates.io crate prsm 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate prsm 0.1.0 on toolchain 50f413885985a8b0a0b6ca0766a0aedd45304953
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "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" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7681b30a122399548cdb6a647f65152e9cddc5edebe44f3b1a766c96d356837
[INFO] running `Command { std: "docker" "start" "-a" "b7681b30a122399548cdb6a647f65152e9cddc5edebe44f3b1a766c96d356837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7681b30a122399548cdb6a647f65152e9cddc5edebe44f3b1a766c96d356837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7681b30a122399548cdb6a647f65152e9cddc5edebe44f3b1a766c96d356837", kill_on_drop: false }`
[INFO] [stdout] b7681b30a122399548cdb6a647f65152e9cddc5edebe44f3b1a766c96d356837
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86ace1291dcaa9366118d026a6c0c2644f9ba7d1ee1ba90dbe79d6c995c6fd20
[INFO] running `Command { std: "docker" "start" "-a" "86ace1291dcaa9366118d026a6c0c2644f9ba7d1ee1ba90dbe79d6c995c6fd20", kill_on_drop: false }`
[INFO] [stderr]     Checking prsm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]    --> src/lib.rs:343:34
[INFO] [stdout]     |
[INFO] [stdout] 343 |                     .map_err(|e| Box::new(e) as Box<dyn $crate::PrsmDisplay>)
[INFO] [stdout]     |                                  ^^^^^^^^ - any code following this expression is unreachable
[INFO] [stdout]     |                                  |
[INFO] [stdout]     |                                  unreachable call
[INFO] [stdout] ...
[INFO] [stdout] 588 |         let script = prsm_script!("infallibe", cannot_fail());
[INFO] [stdout]     |                      ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `prsm_script` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `(): PrsmDisplay` is not satisfied
[INFO] [stdout]    --> src/lib.rs:343:34
[INFO] [stdout]     |
[INFO] [stdout] 343 |                     .map_err(|e| Box::new(e) as Box<dyn $crate::PrsmDisplay>)
[INFO] [stdout]     |                                  ^^^^^^^^^^^ the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout] ...
[INFO] [stdout] 588 |         let script = prsm_script!("infallibe", cannot_fail());
[INFO] [stdout]     |                      ---------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout] note: required for `()` to implement `PrsmDisplay`
[INFO] [stdout]    --> src/lib.rs:49:9
[INFO] [stdout]     |
[INFO] [stdout]  49 | impl<T> PrsmDisplay for T where T: Display + Debug {}
[INFO] [stdout]     |         ^^^^^^^^^^^     ^          ------- unsatisfied trait bound introduced here
[INFO] [stdout]     = note: required for the cast from `Box<()>` to `Box<dyn PrsmDisplay>`
[INFO] [stdout]     = note: this error originates in the macro `prsm_script` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prsm` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "86ace1291dcaa9366118d026a6c0c2644f9ba7d1ee1ba90dbe79d6c995c6fd20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86ace1291dcaa9366118d026a6c0c2644f9ba7d1ee1ba90dbe79d6c995c6fd20", kill_on_drop: false }`
[INFO] [stdout] 86ace1291dcaa9366118d026a6c0c2644f9ba7d1ee1ba90dbe79d6c995c6fd20