[INFO] fetching crate lossyq 0.1.19...
[INFO] testing lossyq-0.1.19 against 1.54.0 for beta-1.55-1
[INFO] extracting crate lossyq 0.1.19 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate lossyq 0.1.19 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8410f6737e40c642e8e49b2151a28d91621da7be9a7691cc6e666c750fa8f0d
[INFO] running `Command { std: "docker" "start" "-a" "c8410f6737e40c642e8e49b2151a28d91621da7be9a7691cc6e666c750fa8f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8410f6737e40c642e8e49b2151a28d91621da7be9a7691cc6e666c750fa8f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8410f6737e40c642e8e49b2151a28d91621da7be9a7691cc6e666c750fa8f0d", kill_on_drop: false }`
[INFO] [stdout] c8410f6737e40c642e8e49b2151a28d91621da7be9a7691cc6e666c750fa8f0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 806ff9c1f8d92ea04efcc506dbc276e22bbc9d256f5685aadacff5798c1039d4
[INFO] running `Command { std: "docker" "start" "-a" "806ff9c1f8d92ea04efcc506dbc276e22bbc9d256f5685aadacff5798c1039d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling lossyq v0.1.19 (/opt/rustwide/workdir)
[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]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "806ff9c1f8d92ea04efcc506dbc276e22bbc9d256f5685aadacff5798c1039d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "806ff9c1f8d92ea04efcc506dbc276e22bbc9d256f5685aadacff5798c1039d4", kill_on_drop: false }`
[INFO] [stdout] 806ff9c1f8d92ea04efcc506dbc276e22bbc9d256f5685aadacff5798c1039d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af8ccf9a0b70de2e623a336877152e2f09411a7550ee8e0a3a8294bdc09bf2d9
[INFO] running `Command { std: "docker" "start" "-a" "af8ccf9a0b70de2e623a336877152e2f09411a7550ee8e0a3a8294bdc09bf2d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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] [stderr]    Compiling lossyq v0.1.19 (/opt/rustwide/workdir)
[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]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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 test [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "af8ccf9a0b70de2e623a336877152e2f09411a7550ee8e0a3a8294bdc09bf2d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af8ccf9a0b70de2e623a336877152e2f09411a7550ee8e0a3a8294bdc09bf2d9", kill_on_drop: false }`
[INFO] [stdout] af8ccf9a0b70de2e623a336877152e2f09411a7550ee8e0a3a8294bdc09bf2d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1fce271bd3d4f12df6af0562a64e8389379b01554037b6a77d513c0859adb071
[INFO] running `Command { std: "docker" "start" "-a" "1fce271bd3d4f12df6af0562a64e8389379b01554037b6a77d513c0859adb071", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/spsc/noloss.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 |                      overflow: &mut Overflow<Input=T>)
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Overflow<Input=T>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]    --> src/cb/mod.rs:157:35
[INFO] [stderr]     |
[INFO] [stderr] 157 |               if chk_flag == (*v).compare_and_swap(chk_flag, new_flag, Ordering::AcqRel) {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/cb/mod.rs:88:16
[INFO] [stderr]    |
[INFO] [stderr] 88 |           panic!(format!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 89 | |           self.write_tmp, self.size, seqno, serial));
[INFO] [stderr]    | |___________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 88 |         panic!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stderr] 89 |           self.write_tmp, self.size, seqno, serial);
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:103:16
[INFO] [stderr]     |
[INFO] [stderr] 103 |         panic!(format!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial));
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 103 |         panic!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial);
[INFO] [stderr]     |               --                                                                                       --
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:167:22
[INFO] [stderr]     |
[INFO] [stderr] 167 | ...   panic!(format!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial));
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 167 |               panic!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial);
[INFO] [stderr]     |                     --                                                                                                           --
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:173:18
[INFO] [stderr]     |
[INFO] [stderr] 173 |           panic!(format!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial));
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 173 |           panic!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial);
[INFO] [stderr]     |                 --                                                                                                           --
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/cb/tests.rs:144:71
[INFO] [stderr]     |
[INFO] [stderr] 144 |   let c = x.iter().fold(String::new(), |mut acc,x| { acc.push_str(x); (acc) } );
[INFO] [stderr]     |                                                                       ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/spsc/noloss.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 |                      overflow: &mut Overflow<Input=T>)
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Overflow<Input=T>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]    --> src/cb/mod.rs:157:35
[INFO] [stderr]     |
[INFO] [stderr] 157 |               if chk_flag == (*v).compare_and_swap(chk_flag, new_flag, Ordering::AcqRel) {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/cb/mod.rs:88:16
[INFO] [stderr]    |
[INFO] [stderr] 88 |           panic!(format!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 89 | |           self.write_tmp, self.size, seqno, serial));
[INFO] [stderr]    | |___________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stderr]    = note: this is no longer accepted in Rust 2021
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 88 |         panic!("write_tmp: {} is invalid. size is {}, seqno is {}, serial is {}",
[INFO] [stderr] 89 |           self.write_tmp, self.size, seqno, serial);
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:103:16
[INFO] [stderr]     |
[INFO] [stderr] 103 |         panic!(format!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial));
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 103 |         panic!("pos: {} is invalid. size is {}, seqno is {}, serial is {}",pos, self.size, seqno, serial);
[INFO] [stderr]     |               --                                                                                       --
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:167:22
[INFO] [stderr]     |
[INFO] [stderr] 167 | ...   panic!(format!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial));
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 167 |               panic!("pos: {} is invalid. size is {}, count is {}, seqno is {}, serial is {}",pos, self.size, count, seqno, serial);
[INFO] [stderr]     |                     --                                                                                                           --
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/cb/mod.rs:173:18
[INFO] [stderr]     |
[INFO] [stderr] 173 |           panic!(format!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial));
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this is no longer accepted in Rust 2021
[INFO] [stderr]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]     |
[INFO] [stderr] 173 |           panic!("count: {} is invalid. size is {}, pos is {}, seqno is {}, serial is {}",count, self.size, pos, seqno, serial);
[INFO] [stderr]     |                 --                                                                                                           --
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lossyq-bb62a3376221276d)
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test cb::tests::empty_buffer ... ok
[INFO] [stdout] test cb::tests::add_one ... ok
[INFO] [stdout] test cb::tests::put_overflow_box_string_3 ... ok
[INFO] [stdout] test cb::tests::iter_less_str_7 ... ok
[INFO] [stdout] test cb::tests::iter_full_box_string ... ok
[INFO] [stdout] test cb::tests::read_twice ... ok
[INFO] [stdout] test cb::tests::iter_empty_i32_5 ... ok
[INFO] [stdout] test cb::tests::put_overflow_box_string ... ok
[INFO] [stdout] test cb::tests::tmp_and_put_i32 ... ok
[INFO] [stdout] test cb::tests::put_full_str ... ok
[INFO] [stdout] test spsc::tests::string_literal ... ok
[INFO] [stdout] test spsc::tests::option_i32 ... ok
[INFO] [stdout] test spsc::tests::with_spawn ... ok
[INFO] [stdout] test spsc::tests::at_most_once ... ok
[INFO] [stdout] test cb::tests::iter_overflow_i32 ... ok
[INFO] [stdout] test spsc::tests::boxed_string_obj ... ok
[INFO] [stdout] test cb::tests::sum_available ... ok
[INFO] [stdout] test cb::tests::iter_less_i32 ... ok
[INFO] [stdout] test cb::tests::iter_less_str ... ok
[INFO] [stdout] test cb::tests::put_less_i32 ... ok
[INFO] [stdout] test spsc::tests::range ... ok
[INFO] [stdout] test spsc::tests::pour_test ... ok
[INFO] [stdout] test spsc::tests::no_loss_iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.12s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lossyq
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1fce271bd3d4f12df6af0562a64e8389379b01554037b6a77d513c0859adb071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fce271bd3d4f12df6af0562a64e8389379b01554037b6a77d513c0859adb071", kill_on_drop: false }`
[INFO] [stdout] 1fce271bd3d4f12df6af0562a64e8389379b01554037b6a77d513c0859adb071
