[INFO] fetching crate dahl-partition 0.5.1...
[INFO] checking dahl-partition-0.5.1 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate dahl-partition 0.5.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate dahl-partition 0.5.1 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dahl-partition 0.5.1
[INFO] finished tweaking crates.io crate dahl-partition 0.5.1
[INFO] tweaked toml for crates.io crate dahl-partition 0.5.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bacb658c37360a58d5c2ee30ed9e626f1f1a6be2ccca88005a03405cd35b6540
[INFO] running `Command { std: "docker" "start" "-a" "bacb658c37360a58d5c2ee30ed9e626f1f1a6be2ccca88005a03405cd35b6540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bacb658c37360a58d5c2ee30ed9e626f1f1a6be2ccca88005a03405cd35b6540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bacb658c37360a58d5c2ee30ed9e626f1f1a6be2ccca88005a03405cd35b6540", kill_on_drop: false }`
[INFO] [stdout] bacb658c37360a58d5c2ee30ed9e626f1f1a6be2ccca88005a03405cd35b6540
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27ad42772476375c5034f323932172f5ab9eed27fc63c3eca29d6e26f2091028
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "27ad42772476375c5034f323932172f5ab9eed27fc63c3eca29d6e26f2091028", kill_on_drop: false }`
[INFO] [stderr]     Checking dahl-partition v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:582:20
[INFO] [stdout]     |
[INFO] [stdout] 582 |               panic!(format!(
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 583 | |                 "Attempt to allocate item {} when only {} are available.",
[INFO] [stdout] 584 | |                 item_index, self.n_items
[INFO] [stdout] 585 | |             ));
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 582 |             panic!(
[INFO] [stdout] 583 |                 "Attempt to allocate item {} when only {} are available.",
[INFO] [stdout] 584 |                 item_index, self.n_items
[INFO] [stdout] 585 |             );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:591:20
[INFO] [stdout]     |
[INFO] [stdout] 591 |               panic!(format!(
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 592 | |                 "Attempt to allocate to subset {} when only {} are available.",
[INFO] [stdout] 593 | |                 subset_index,
[INFO] [stdout] 594 | |                 self.n_subsets()
[INFO] [stdout] 595 | |             ));
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 591 |             panic!(
[INFO] [stdout] 592 |                 "Attempt to allocate to subset {} when only {} are available.",
[INFO] [stdout] 593 |                 subset_index,
[INFO] [stdout] 594 |                 self.n_subsets()
[INFO] [stdout] 595 |             );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:602:28
[INFO] [stdout]     |
[INFO] [stdout] 602 |             None => panic!(format!("Item {} is not allocated.", item_index)),
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 602 |             None => panic!("Item {} is not allocated.", item_index),
[INFO] [stdout]     |                           --                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:608:31
[INFO] [stdout]     |
[INFO] [stdout] 608 |               Some(j) => panic!(format!(
[INFO] [stdout]     |  _______________________________^
[INFO] [stdout] 609 | |                 "Item {} is already allocated to subset {}.",
[INFO] [stdout] 610 | |                 item_index, j
[INFO] [stdout] 611 | |             )),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 608 |             Some(j) => panic!(
[INFO] [stdout] 609 |                 "Item {} is already allocated to subset {}.",
[INFO] [stdout] 610 |                 item_index, j
[INFO] [stdout] 611 |             ),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:620:28
[INFO] [stdout]     |
[INFO] [stdout] 620 |                       panic!(format!(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 621 | |                         "Item {} is already allocated to subset {}.",
[INFO] [stdout] 622 | |                         item_index, j
[INFO] [stdout] 623 | |                     ));
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 620 |                     panic!(
[INFO] [stdout] 621 |                         "Item {} is already allocated to subset {}.",
[INFO] [stdout] 622 |                         item_index, j
[INFO] [stdout] 623 |                     );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:626:28
[INFO] [stdout]     |
[INFO] [stdout] 626 |               None => panic!(format!(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 627 | |                 "Item {} is not allocated to any subset.",
[INFO] [stdout] 628 | |                 item_index
[INFO] [stdout] 629 | |             )),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 626 |             None => panic!(
[INFO] [stdout] 627 |                 "Item {} is not allocated to any subset.",
[INFO] [stdout] 628 |                 item_index
[INFO] [stdout] 629 |             ),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:582:20
[INFO] [stdout]     |
[INFO] [stdout] 582 |               panic!(format!(
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 583 | |                 "Attempt to allocate item {} when only {} are available.",
[INFO] [stdout] 584 | |                 item_index, self.n_items
[INFO] [stdout] 585 | |             ));
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 582 |             panic!(
[INFO] [stdout] 583 |                 "Attempt to allocate item {} when only {} are available.",
[INFO] [stdout] 584 |                 item_index, self.n_items
[INFO] [stdout] 585 |             );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/lib.rs:1306:13
[INFO] [stdout]      |
[INFO] [stdout] 1306 | /             format!(
[INFO] [stdout] 1307 | |                 "The holder has capacity {} so cannot push with index {}.",
[INFO] [stdout] 1308 | |                 self.n_partitions, self.index
[INFO] [stdout] 1309 | |             )
[INFO] [stdout]      | |_____________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this is no longer accepted in Rust 2021
[INFO] [stdout]      = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]      |
[INFO] [stdout] 1306 |             
[INFO] [stdout] 1307 |                 "The holder has capacity {} so cannot push with index {}.",
[INFO] [stdout] 1308 |                 self.n_partitions, self.index
[INFO] [stdout] 1309 |             
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:591:20
[INFO] [stdout]     |
[INFO] [stdout] 591 |               panic!(format!(
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 592 | |                 "Attempt to allocate to subset {} when only {} are available.",
[INFO] [stdout] 593 | |                 subset_index,
[INFO] [stdout] 594 | |                 self.n_subsets()
[INFO] [stdout] 595 | |             ));
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 591 |             panic!(
[INFO] [stdout] 592 |                 "Attempt to allocate to subset {} when only {} are available.",
[INFO] [stdout] 593 |                 subset_index,
[INFO] [stdout] 594 |                 self.n_subsets()
[INFO] [stdout] 595 |             );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:602:28
[INFO] [stdout]     |
[INFO] [stdout] 602 |             None => panic!(format!("Item {} is not allocated.", item_index)),
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 602 |             None => panic!("Item {} is not allocated.", item_index),
[INFO] [stdout]     |                           --                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:608:31
[INFO] [stdout]     |
[INFO] [stdout] 608 |               Some(j) => panic!(format!(
[INFO] [stdout]     |  _______________________________^
[INFO] [stdout] 609 | |                 "Item {} is already allocated to subset {}.",
[INFO] [stdout] 610 | |                 item_index, j
[INFO] [stdout] 611 | |             )),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 608 |             Some(j) => panic!(
[INFO] [stdout] 609 |                 "Item {} is already allocated to subset {}.",
[INFO] [stdout] 610 |                 item_index, j
[INFO] [stdout] 611 |             ),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:620:28
[INFO] [stdout]     |
[INFO] [stdout] 620 |                       panic!(format!(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 621 | |                         "Item {} is already allocated to subset {}.",
[INFO] [stdout] 622 | |                         item_index, j
[INFO] [stdout] 623 | |                     ));
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 620 |                     panic!(
[INFO] [stdout] 621 |                         "Item {} is already allocated to subset {}.",
[INFO] [stdout] 622 |                         item_index, j
[INFO] [stdout] 623 |                     );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:626:28
[INFO] [stdout]     |
[INFO] [stdout] 626 |               None => panic!(format!(
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 627 | |                 "Item {} is not allocated to any subset.",
[INFO] [stdout] 628 | |                 item_index
[INFO] [stdout] 629 | |             )),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 626 |             None => panic!(
[INFO] [stdout] 627 |                 "Item {} is not allocated to any subset.",
[INFO] [stdout] 628 |                 item_index
[INFO] [stdout] 629 |             ),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/lib.rs:1306:13
[INFO] [stdout]      |
[INFO] [stdout] 1306 | /             format!(
[INFO] [stdout] 1307 | |                 "The holder has capacity {} so cannot push with index {}.",
[INFO] [stdout] 1308 | |                 self.n_partitions, self.index
[INFO] [stdout] 1309 | |             )
[INFO] [stdout]      | |_____________^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this is no longer accepted in Rust 2021
[INFO] [stdout]      = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]      |
[INFO] [stdout] 1306 |             
[INFO] [stdout] 1307 |                 "The holder has capacity {} so cannot push with index {}.",
[INFO] [stdout] 1308 |                 self.n_partitions, self.index
[INFO] [stdout] 1309 |             
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "27ad42772476375c5034f323932172f5ab9eed27fc63c3eca29d6e26f2091028", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27ad42772476375c5034f323932172f5ab9eed27fc63c3eca29d6e26f2091028", kill_on_drop: false }`
[INFO] [stdout] 27ad42772476375c5034f323932172f5ab9eed27fc63c3eca29d6e26f2091028