[INFO] fetching crate futures-await-syn 0.12.0...
[INFO] checking futures-await-syn-0.12.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate futures-await-syn 0.12.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate futures-await-syn 0.12.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-await-syn 0.12.0
[INFO] finished tweaking crates.io crate futures-await-syn 0.12.0
[INFO] tweaked toml for crates.io crate futures-await-syn 0.12.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-await-synom v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 7b8a83ae43c2250cbdf9ed5d9ed9dd68864b967d5d191301b571386cf9ba7115
[INFO] running `Command { std: "docker" "start" "-a" "7b8a83ae43c2250cbdf9ed5d9ed9dd68864b967d5d191301b571386cf9ba7115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b8a83ae43c2250cbdf9ed5d9ed9dd68864b967d5d191301b571386cf9ba7115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b8a83ae43c2250cbdf9ed5d9ed9dd68864b967d5d191301b571386cf9ba7115", kill_on_drop: false }`
[INFO] [stdout] 7b8a83ae43c2250cbdf9ed5d9ed9dd68864b967d5d191301b571386cf9ba7115
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d0e10707d55f1e24e538dbfc04517cc286bfcff18a779f0b7f61d464a599e78
[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" "4d0e10707d55f1e24e538dbfc04517cc286bfcff18a779f0b7f61d464a599e78", kill_on_drop: false }`
[INFO] [stderr]     Checking proc-macro2 v0.1.10
[INFO] [stderr]    Compiling extprim v1.7.1
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking futures-await-quote v0.4.0
[INFO] [stderr]     Checking futures-await-synom v0.12.0
[INFO] [stderr]     Checking futures-await-syn v0.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:861:5
[INFO] [stdout]     |
[INFO] [stdout] 861 | /     /// ```ignore
[INFO] [stdout] 862 | |     /// <and> || <and> ...
[INFO] [stdout] 863 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:866:5
[INFO] [stdout]     |
[INFO] [stdout] 866 | /     /// ```ignore
[INFO] [stdout] 867 | |     /// <compare> && <compare> ...
[INFO] [stdout] 868 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:871:5
[INFO] [stdout]     |
[INFO] [stdout] 871 | /     /// ```ignore
[INFO] [stdout] 872 | |     /// <bitor> == <bitor> ...
[INFO] [stdout] 873 | |     /// <bitor> != <bitor> ...
[INFO] [stdout] 874 | |     /// <bitor> >= <bitor> ...
[INFO] [stdout] ...   |
[INFO] [stdout] 880 | |     /// NOTE: This operator appears to be parsed as left-associative, but errors
[INFO] [stdout] 881 | |     /// if it is used in a non-associative manner.
[INFO] [stdout]     | |_____---------------------------------------------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:903:5
[INFO] [stdout]     |
[INFO] [stdout] 903 | /     /// ```ignore
[INFO] [stdout] 904 | |     /// <bitxor> | <bitxor> ...
[INFO] [stdout] 905 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:913:5
[INFO] [stdout]     |
[INFO] [stdout] 913 | /     /// ```ignore
[INFO] [stdout] 914 | |     /// <bitand> ^ <bitand> ...
[INFO] [stdout] 915 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:923:5
[INFO] [stdout]     |
[INFO] [stdout] 923 | /     /// ```ignore
[INFO] [stdout] 924 | |     /// <shift> & <shift> ...
[INFO] [stdout] 925 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:934:5
[INFO] [stdout]     |
[INFO] [stdout] 934 | /     /// ```ignore
[INFO] [stdout] 935 | |     /// <arith> << <arith> ...
[INFO] [stdout] 936 | |     /// <arith> >> <arith> ...
[INFO] [stdout] 937 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:944:5
[INFO] [stdout]     |
[INFO] [stdout] 944 | /     /// ```ignore
[INFO] [stdout] 945 | |     /// <term> + <term> ...
[INFO] [stdout] 946 | |     /// <term> - <term> ...
[INFO] [stdout] 947 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:954:5
[INFO] [stdout]     |
[INFO] [stdout] 954 | /     /// ```ignore
[INFO] [stdout] 955 | |     /// <cast> * <cast> ...
[INFO] [stdout] 956 | |     /// <cast> / <cast> ...
[INFO] [stdout] 957 | |     /// <cast> % <cast> ...
[INFO] [stdout] 958 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:967:5
[INFO] [stdout]     |
[INFO] [stdout] 967 | /     /// ```ignore
[INFO] [stdout] 968 | |     /// <unary> as <ty>
[INFO] [stdout] 969 | |     /// <unary> : <ty>
[INFO] [stdout] 970 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/ty.rs:350:9
[INFO] [stdout]     |
[INFO] [stdout] 350 | /         /// In some positions, types may not contain the `+` character, to
[INFO] [stdout] 351 | |         /// disambiguate them. For example in the expression `1 as T`, T may not
[INFO] [stdout] 352 | |         /// contain a `+` character.
[INFO] [stdout] 353 | |         ///
[INFO] [stdout] 354 | |         /// This parser does not allow a `+`, while the default parser does.
[INFO] [stdout]     | |_________-------------------------------------------------------------------^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/lifetime.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{:?} is not a valid lifetime name");
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{:?} is not a valid lifetime name", ...);
[INFO] [stdout]    |                                                       ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{}", "{:?} is not a valid lifetime name");
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking syntex_pos v0.59.1
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking syntex_errors v0.59.1
[INFO] [stderr]     Checking syntex_syntax v0.59.1
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:861:5
[INFO] [stdout]     |
[INFO] [stdout] 861 | /     /// ```ignore
[INFO] [stdout] 862 | |     /// <and> || <and> ...
[INFO] [stdout] 863 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:866:5
[INFO] [stdout]     |
[INFO] [stdout] 866 | /     /// ```ignore
[INFO] [stdout] 867 | |     /// <compare> && <compare> ...
[INFO] [stdout] 868 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:871:5
[INFO] [stdout]     |
[INFO] [stdout] 871 | /     /// ```ignore
[INFO] [stdout] 872 | |     /// <bitor> == <bitor> ...
[INFO] [stdout] 873 | |     /// <bitor> != <bitor> ...
[INFO] [stdout] 874 | |     /// <bitor> >= <bitor> ...
[INFO] [stdout] ...   |
[INFO] [stdout] 880 | |     /// NOTE: This operator appears to be parsed as left-associative, but errors
[INFO] [stdout] 881 | |     /// if it is used in a non-associative manner.
[INFO] [stdout]     | |_____---------------------------------------------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:903:5
[INFO] [stdout]     |
[INFO] [stdout] 903 | /     /// ```ignore
[INFO] [stdout] 904 | |     /// <bitxor> | <bitxor> ...
[INFO] [stdout] 905 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:913:5
[INFO] [stdout]     |
[INFO] [stdout] 913 | /     /// ```ignore
[INFO] [stdout] 914 | |     /// <bitand> ^ <bitand> ...
[INFO] [stdout] 915 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:923:5
[INFO] [stdout]     |
[INFO] [stdout] 923 | /     /// ```ignore
[INFO] [stdout] 924 | |     /// <shift> & <shift> ...
[INFO] [stdout] 925 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:934:5
[INFO] [stdout]     |
[INFO] [stdout] 934 | /     /// ```ignore
[INFO] [stdout] 935 | |     /// <arith> << <arith> ...
[INFO] [stdout] 936 | |     /// <arith> >> <arith> ...
[INFO] [stdout] 937 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:944:5
[INFO] [stdout]     |
[INFO] [stdout] 944 | /     /// ```ignore
[INFO] [stdout] 945 | |     /// <term> + <term> ...
[INFO] [stdout] 946 | |     /// <term> - <term> ...
[INFO] [stdout] 947 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:954:5
[INFO] [stdout]     |
[INFO] [stdout] 954 | /     /// ```ignore
[INFO] [stdout] 955 | |     /// <cast> * <cast> ...
[INFO] [stdout] 956 | |     /// <cast> / <cast> ...
[INFO] [stdout] 957 | |     /// <cast> % <cast> ...
[INFO] [stdout] 958 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/expr.rs:967:5
[INFO] [stdout]     |
[INFO] [stdout] 967 | /     /// ```ignore
[INFO] [stdout] 968 | |     /// <unary> as <ty>
[INFO] [stdout] 969 | |     /// <unary> : <ty>
[INFO] [stdout] 970 | |     /// ```
[INFO] [stdout]     | |_____------^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/ty.rs:350:9
[INFO] [stdout]     |
[INFO] [stdout] 350 | /         /// In some positions, types may not contain the `+` character, to
[INFO] [stdout] 351 | |         /// disambiguate them. For example in the expression `1 as T`, T may not
[INFO] [stdout] 352 | |         /// contain a `+` character.
[INFO] [stdout] 353 | |         ///
[INFO] [stdout] 354 | |         /// This parser does not allow a `+`, while the default parser does.
[INFO] [stdout]     | |_________-------------------------------------------------------------------^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/lifetime.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{:?} is not a valid lifetime name");
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{:?} is not a valid lifetime name", ...);
[INFO] [stdout]    |                                                       ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 50 |             panic!("{}", "{:?} is not a valid lifetime name");
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.96s
[INFO] running `Command { std: "docker" "inspect" "4d0e10707d55f1e24e538dbfc04517cc286bfcff18a779f0b7f61d464a599e78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d0e10707d55f1e24e538dbfc04517cc286bfcff18a779f0b7f61d464a599e78", kill_on_drop: false }`
[INFO] [stdout] 4d0e10707d55f1e24e538dbfc04517cc286bfcff18a779f0b7f61d464a599e78
