[INFO] fetching crate test4a 0.1.1...
[INFO] checking test4a-0.1.1 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate test4a 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate test4a 0.1.1 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate test4a 0.1.1
[INFO] finished tweaking crates.io crate test4a 0.1.1
[INFO] tweaked toml for crates.io crate test4a 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1aafacf86a4205826f951b587d7ba84a015415be35bdab7a696921db5947eb4c
[INFO] running `Command { std: "docker" "start" "-a" "1aafacf86a4205826f951b587d7ba84a015415be35bdab7a696921db5947eb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1aafacf86a4205826f951b587d7ba84a015415be35bdab7a696921db5947eb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1aafacf86a4205826f951b587d7ba84a015415be35bdab7a696921db5947eb4c", kill_on_drop: false }`
[INFO] [stdout] 1aafacf86a4205826f951b587d7ba84a015415be35bdab7a696921db5947eb4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e14bc4ce78cc0954ee6fe88d6c7f6826108aa960b3103adac2992d77b49c803
[INFO] running `Command { std: "docker" "start" "-a" "1e14bc4ce78cc0954ee6fe88d6c7f6826108aa960b3103adac2992d77b49c803", kill_on_drop: false }`
[INFO] [stderr]     Checking test4a v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/runners/act.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     action_function: Box<Fn(&mut Message, &mut T) + 'a>,
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     action_function: Box<dyn Fn(&mut Message, &mut T) + 'a>,
[INFO] [stdout]   |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/runners/act.rs:8:31
[INFO] [stdout]   |
[INFO] [stdout] 8 |     expectation_function: Box<Fn() -> E + 'a>,
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 |     expectation_function: Box<dyn Fn() -> E + 'a>,
[INFO] [stdout]   |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runners/runner.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |     arrange_function: Box<Fn(&mut Message) -> T + 'a>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 71 |     arrange_function: Box<dyn Fn(&mut Message) -> T + 'a>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/runners/act.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     action_function: Box<Fn(&mut Message, &mut T) + 'a>,
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     action_function: Box<dyn Fn(&mut Message, &mut T) + 'a>,
[INFO] [stdout]   |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/runners/act.rs:8:31
[INFO] [stdout]   |
[INFO] [stdout] 8 |     expectation_function: Box<Fn() -> E + 'a>,
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 8 |     expectation_function: Box<dyn Fn() -> E + 'a>,
[INFO] [stdout]   |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/runners/runner.rs:71:27
[INFO] [stdout]    |
[INFO] [stdout] 71 |     arrange_function: Box<Fn(&mut Message) -> T + 'a>,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 71 |     arrange_function: Box<dyn Fn(&mut Message) -> T + 'a>,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 panic!(Self::format_error_message(&message, NO_PANIC_ERROR));
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 panic!("{}", Self::format_error_message(&message, NO_PANIC_ERROR));
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:122:24
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 panic!(Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 panic!("{}", Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:145:24
[INFO] [stdout]     |
[INFO] [stdout] 145 |                   panic!(Self::format_error_message(
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 146 | |                     &message,
[INFO] [stdout] 147 | |                     &result.error_message()
[INFO] [stdout] 148 | |                 ));
[INFO] [stdout]     | |_________________^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 panic!("{}", Self::format_error_message(
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:175:28
[INFO] [stdout]     |
[INFO] [stdout] 175 |                       panic!(Self::format_error_message(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 176 | |                         &message,
[INFO] [stdout] 177 | |                         NO_PANIC_ERROR
[INFO] [stdout] 178 | |                     ));
[INFO] [stdout]     | |_____________________^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     panic!("{}", Self::format_error_message(
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:180:28
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     panic!(Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     panic!("{}", Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 panic!(Self::format_error_message(&message, NO_PANIC_ERROR));
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 panic!("{}", Self::format_error_message(&message, NO_PANIC_ERROR));
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:122:24
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 panic!(Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 panic!("{}", Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:145:24
[INFO] [stdout]     |
[INFO] [stdout] 145 |                   panic!(Self::format_error_message(
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 146 | |                     &message,
[INFO] [stdout] 147 | |                     &result.error_message()
[INFO] [stdout] 148 | |                 ));
[INFO] [stdout]     | |_________________^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 145 |                 panic!("{}", Self::format_error_message(
[INFO] [stdout]     |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:175:28
[INFO] [stdout]     |
[INFO] [stdout] 175 |                       panic!(Self::format_error_message(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 176 | |                         &message,
[INFO] [stdout] 177 | |                         NO_PANIC_ERROR
[INFO] [stdout] 178 | |                     ));
[INFO] [stdout]     | |_____________________^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     panic!("{}", Self::format_error_message(
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/runners/runner.rs:180:28
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     panic!(Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     panic!("{}", Self::format_error_message(&message, PANIC_ERROR));
[INFO] [stdout]     |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "1e14bc4ce78cc0954ee6fe88d6c7f6826108aa960b3103adac2992d77b49c803", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e14bc4ce78cc0954ee6fe88d6c7f6826108aa960b3103adac2992d77b49c803", kill_on_drop: false }`
[INFO] [stdout] 1e14bc4ce78cc0954ee6fe88d6c7f6826108aa960b3103adac2992d77b49c803