[INFO] fetching crate lossyq 0.1.19...
[INFO] checking lossyq-0.1.19 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate lossyq 0.1.19 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate lossyq 0.1.19 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lossyq 0.1.19
[INFO] finished tweaking crates.io crate lossyq 0.1.19
[INFO] tweaked toml for crates.io crate lossyq 0.1.19 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "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] 7419503b1360d77f569169a45c9102b49b0d1716f156fa952bab2f0bf45b901a
[INFO] running `Command { std: "docker" "start" "-a" "7419503b1360d77f569169a45c9102b49b0d1716f156fa952bab2f0bf45b901a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7419503b1360d77f569169a45c9102b49b0d1716f156fa952bab2f0bf45b901a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7419503b1360d77f569169a45c9102b49b0d1716f156fa952bab2f0bf45b901a", kill_on_drop: false }`
[INFO] [stdout] 7419503b1360d77f569169a45c9102b49b0d1716f156fa952bab2f0bf45b901a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79b4dfc7bf9453b094f0b0f381dd55e8adc34ff5d03deb3adfa565b636fb18b7
[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" "79b4dfc7bf9453b094f0b0f381dd55e8adc34ff5d03deb3adfa565b636fb18b7", kill_on_drop: false }`
[INFO] [stderr]     Checking lossyq v0.1.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/spsc/noloss.rs:16:37
[INFO] [stdout]    |
[INFO] [stdout] 16 |                      overflow: &mut Overflow<Input=T>)
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Overflow<Input=T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/cb/mod.rs:157:35
[INFO] [stdout]     |
[INFO] [stdout] 157 |               if chk_flag == (*v).compare_and_swap(chk_flag, new_flag, Ordering::AcqRel) {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/cb/mod.rs:88:16
[INFO] [stdout]    |
[INFO] [stdout] 88 |           panic!(format!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 89 | |           self.write_tmp, self.size, seqno, serial));
[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] 88 |         panic!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stdout] 89 |           self.write_tmp, self.size, seqno, serial);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |         panic!(format!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial));
[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] 103 |         panic!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial);
[INFO] [stdout]     |               --                                                                                       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:167:22
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...   panic!(format!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial));
[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] 167 |               panic!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial);
[INFO] [stdout]     |                     --                                                                                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:173:18
[INFO] [stdout]     |
[INFO] [stdout] 173 |           panic!(format!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial));
[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] 173 |           panic!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial);
[INFO] [stdout]     |                 --                                                                                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/cb/tests.rs:144:71
[INFO] [stdout]     |
[INFO] [stdout] 144 |   let c = x.iter().fold(String::new(), |mut acc,x| { acc.push_str(x); (acc) } );
[INFO] [stdout]     |                                                                       ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/spsc/noloss.rs:16:37
[INFO] [stdout]    |
[INFO] [stdout] 16 |                      overflow: &mut Overflow<Input=T>)
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Overflow<Input=T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/cb/mod.rs:157:35
[INFO] [stdout]     |
[INFO] [stdout] 157 |               if chk_flag == (*v).compare_and_swap(chk_flag, new_flag, Ordering::AcqRel) {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/cb/mod.rs:88:16
[INFO] [stdout]    |
[INFO] [stdout] 88 |           panic!(format!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 89 | |           self.write_tmp, self.size, seqno, serial));
[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] 88 |         panic!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stdout] 89 |           self.write_tmp, self.size, seqno, serial);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:103:16
[INFO] [stdout]     |
[INFO] [stdout] 103 |         panic!(format!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial));
[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] 103 |         panic!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial);
[INFO] [stdout]     |               --                                                                                       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:167:22
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...   panic!(format!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial));
[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] 167 |               panic!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial);
[INFO] [stdout]     |                     --                                                                                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/cb/mod.rs:173:18
[INFO] [stdout]     |
[INFO] [stdout] 173 |           panic!(format!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial));
[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] 173 |           panic!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial);
[INFO] [stdout]     |                 --                                                                                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "79b4dfc7bf9453b094f0b0f381dd55e8adc34ff5d03deb3adfa565b636fb18b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b4dfc7bf9453b094f0b0f381dd55e8adc34ff5d03deb3adfa565b636fb18b7", kill_on_drop: false }`
[INFO] [stdout] 79b4dfc7bf9453b094f0b0f381dd55e8adc34ff5d03deb3adfa565b636fb18b7