[INFO] fetching crate proc-macro2-impersonated 0.1.1...
[INFO] building proc-macro2-impersonated-0.1.1 against try#9b5e8b16bd1c4acf4cf8e6880368314cf021a987+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate proc-macro2-impersonated 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate proc-macro2-impersonated 0.1.1 on toolchain 9b5e8b16bd1c4acf4cf8e6880368314cf021a987
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proc-macro2-impersonated 0.1.1
[INFO] finished tweaking crates.io crate proc-macro2-impersonated 0.1.1
[INFO] tweaked toml for crates.io crate proc-macro2-impersonated 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f51d7a883237689ca0b7791ffc371ae341e8892b6e40ba6a3c5cf927797235f
[INFO] running `Command { std: "docker" "start" "-a" "0f51d7a883237689ca0b7791ffc371ae341e8892b6e40ba6a3c5cf927797235f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f51d7a883237689ca0b7791ffc371ae341e8892b6e40ba6a3c5cf927797235f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f51d7a883237689ca0b7791ffc371ae341e8892b6e40ba6a3c5cf927797235f", kill_on_drop: false }`
[INFO] [stdout] 0f51d7a883237689ca0b7791ffc371ae341e8892b6e40ba6a3c5cf927797235f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a3eab2a3d74db94fba33df9e3640f589bb0e33d3144e63c78d319f9301c96f8
[INFO] running `Command { std: "docker" "start" "-a" "0a3eab2a3d74db94fba33df9e3640f589bb0e33d3144e63c78d319f9301c96f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2-impersonated v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling unicode-xid v0.2.6
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]   --> build.rs:46:30
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let semver_exempt = cfg!(procmacro2_semver_exempt);
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `proc_macro_span`
[INFO] [stdout]   --> src/lib.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(any(proc_macro_span, super_unstable), feature(proc_macro_span))]
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(proc_macro_span)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(proc_macro_span)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `super_unstable`
[INFO] [stdout]   --> src/lib.rs:13:34
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(any(proc_macro_span, super_unstable), feature(proc_macro_span))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `clippy`, `debug_assertions`, `doc`, `docsrs`, `doctest`, `feature`, `fmt_debug`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `rustfmt`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `ub_checks`, `unix`, and `windows`
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(super_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(super_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `super_unstable`
[INFO] [stdout]   --> src/lib.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![cfg_attr(super_unstable, feature(proc_macro_raw_ident, proc_macro_def_site))]
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(super_unstable)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(super_unstable)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `use_proc_macro`
[INFO] [stdout]   --> src/lib.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[cfg(use_proc_macro)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(use_proc_macro)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(use_proc_macro)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]   --> src/lib.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 | #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `use_proc_macro`
[INFO] [stdout]    --> src/lib.rs:109:7
[INFO] [stdout]     |
[INFO] [stdout] 109 | #[cfg(use_proc_macro)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(use_proc_macro)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(use_proc_macro)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `use_proc_macro`
[INFO] [stdout]    --> src/lib.rs:116:7
[INFO] [stdout]     |
[INFO] [stdout] 116 | #[cfg(use_proc_macro)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(use_proc_macro)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(use_proc_macro)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:180:7
[INFO] [stdout]     |
[INFO] [stdout] 180 | #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:187:7
[INFO] [stdout]     |
[INFO] [stdout] 187 | #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:220:7
[INFO] [stdout]     |
[INFO] [stdout] 220 | #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/lib.rs:230:7
[INFO] [stdout]     |
[INFO] [stdout] 230 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]   --> src/strnom.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 |     #[cfg(span_locations)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]   --> src/strnom.rs:15:15
[INFO] [stdout]    |
[INFO] [stdout] 15 |     #[cfg(not(span_locations))]
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]   --> src/strnom.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 |     #[cfg(span_locations)]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]  --> src/fallback.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[cfg(span_locations)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]  --> src/fallback.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(span_locations)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]  --> src/fallback.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]   --> src/fallback.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | #[cfg(span_locations)]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]   --> src/fallback.rs:50:11
[INFO] [stdout]    |
[INFO] [stdout] 50 | #[cfg(not(span_locations))]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `use_proc_macro`
[INFO] [stdout]    --> src/fallback.rs:120:7
[INFO] [stdout]     |
[INFO] [stdout] 120 | #[cfg(use_proc_macro)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(use_proc_macro)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(use_proc_macro)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `use_proc_macro`
[INFO] [stdout]    --> src/fallback.rs:130:7
[INFO] [stdout]     |
[INFO] [stdout] 130 | #[cfg(use_proc_macro)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^ help: there is a config with a similar name: `proc_macro`
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(use_proc_macro)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(use_proc_macro)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:226:7
[INFO] [stdout]     |
[INFO] [stdout] 226 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:252:7
[INFO] [stdout]     |
[INFO] [stdout] 252 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:260:7
[INFO] [stdout]     |
[INFO] [stdout] 260 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:286:7
[INFO] [stdout]     |
[INFO] [stdout] 286 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:297:7
[INFO] [stdout]     |
[INFO] [stdout] 297 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:302:7
[INFO] [stdout]     |
[INFO] [stdout] 302 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:859:11
[INFO] [stdout]     |
[INFO] [stdout] 859 | #[cfg(not(span_locations))]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:868:7
[INFO] [stdout]     |
[INFO] [stdout] 868 | #[cfg(span_locations)]
[INFO] [stdout]     |       ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:347:11
[INFO] [stdout]     |
[INFO] [stdout] 347 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:349:11
[INFO] [stdout]     |
[INFO] [stdout] 349 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:354:15
[INFO] [stdout]     |
[INFO] [stdout] 354 |     #[cfg(not(span_locations))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:359:11
[INFO] [stdout]     |
[INFO] [stdout] 359 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:364:11
[INFO] [stdout]     |
[INFO] [stdout] 364 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:369:11
[INFO] [stdout]     |
[INFO] [stdout] 369 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:377:11
[INFO] [stdout]     |
[INFO] [stdout] 377 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:382:11
[INFO] [stdout]     |
[INFO] [stdout] 382 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:393:11
[INFO] [stdout]     |
[INFO] [stdout] 393 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:402:11
[INFO] [stdout]     |
[INFO] [stdout] 402 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:411:11
[INFO] [stdout]     |
[INFO] [stdout] 411 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:420:15
[INFO] [stdout]     |
[INFO] [stdout] 420 |     #[cfg(not(span_locations))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:425:11
[INFO] [stdout]     |
[INFO] [stdout] 425 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:440:15
[INFO] [stdout]     |
[INFO] [stdout] 440 |     #[cfg(not(span_locations))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:445:11
[INFO] [stdout]     |
[INFO] [stdout] 445 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:453:15
[INFO] [stdout]     |
[INFO] [stdout] 453 |     #[cfg(not(span_locations))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/fallback.rs:458:11
[INFO] [stdout]     |
[INFO] [stdout] 458 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:469:15
[INFO] [stdout]     |
[INFO] [stdout] 469 |         #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:472:19
[INFO] [stdout]     |
[INFO] [stdout] 472 |         #[cfg(not(procmacro2_semver_exempt))]
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:478:13
[INFO] [stdout]     |
[INFO] [stdout] 478 |     if cfg!(procmacro2_semver_exempt) {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:546:15
[INFO] [stdout]     |
[INFO] [stdout] 546 |         #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:662:15
[INFO] [stdout]     |
[INFO] [stdout] 662 |     #[cfg(not(procmacro2_semver_exempt))]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:673:11
[INFO] [stdout]     |
[INFO] [stdout] 673 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/fallback.rs:830:15
[INFO] [stdout]     |
[INFO] [stdout] 830 |         #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]     --> src/fallback.rs:1440:33
[INFO] [stdout]      |
[INFO] [stdout] 1440 | named!(doc_comment_contents -> (&str, bool), alt!(
[INFO] [stdout]      |                                 ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]      |
[INFO] [stdout]     ::: src/strnom.rs:160:18
[INFO] [stdout]      |
[INFO] [stdout] 160  |         fn $name<'a>(i: Cursor<'a>) -> $crate::strnom::PResult<'a, $o> {
[INFO] [stdout]      |                  -- lifetime `'a` declared here
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:275:11
[INFO] [stdout]     |
[INFO] [stdout] 275 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:284:11
[INFO] [stdout]     |
[INFO] [stdout] 284 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:293:11
[INFO] [stdout]     |
[INFO] [stdout] 293 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:301:11
[INFO] [stdout]     |
[INFO] [stdout] 301 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/lib.rs:309:11
[INFO] [stdout]     |
[INFO] [stdout] 309 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/lib.rs:318:11
[INFO] [stdout]     |
[INFO] [stdout] 318 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `span_locations`
[INFO] [stdout]    --> src/lib.rs:327:11
[INFO] [stdout]     |
[INFO] [stdout] 327 |     #[cfg(span_locations)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(span_locations)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(span_locations)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:348:11
[INFO] [stdout]     |
[INFO] [stdout] 348 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `procmacro2_semver_exempt`
[INFO] [stdout]    --> src/lib.rs:762:11
[INFO] [stdout]     |
[INFO] [stdout] 762 |     #[cfg(procmacro2_semver_exempt)]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(procmacro2_semver_exempt)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(procmacro2_semver_exempt)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: internal compiler error: compiler/rustc_mir_build/src/builder/scope.rs:1724:17: cannot unwind from goto -> bb171
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] thread 'rustc' panicked at compiler/rustc_mir_build/src/builder/scope.rs:1724:17:
[INFO] [stderr] Box<dyn Any>
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x72a709981caa - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h636462e57d5ef1e1
[INFO] [stderr]    1:     0x72a70a013cbc - core::fmt::write::h067060808ac50eb9
[INFO] [stderr]    2:     0x72a70af28e11 - std::io::Write::write_fmt::h4674fa2ed7c0dfdd
[INFO] [stderr]    3:     0x72a709981b02 - std::sys::backtrace::BacktraceLock::print::h0c77148acfb0b5e9
[INFO] [stderr]    4:     0x72a709983ffa - std::panicking::default_hook::{{closure}}::h30daa8e7c6ccb09d
[INFO] [stderr]    5:     0x72a709983e43 - std::panicking::default_hook::h25f21dc0f2064615
[INFO] [stderr]    6:     0x72a708aeff28 - std[b36e883d67eb0403]::panicking::update_hook::<alloc[b228c160e2f6f380]::boxed::Box<rustc_driver_impl[be5855d19ccc8b6c]::install_ice_hook::{closure#0}>>::{closure#0}
[INFO] [stderr]    7:     0x72a7099847b8 - std::panicking::rust_panic_with_hook::hc98438687e833605
[INFO] [stderr]    8:     0x72a708b2a341 - std[b36e883d67eb0403]::panicking::begin_panic::<rustc_errors[485cd74d39701405]::ExplicitBug>::{closure#0}
[INFO] [stderr]    9:     0x72a708b1f526 - std[b36e883d67eb0403]::sys::backtrace::__rust_end_short_backtrace::<std[b36e883d67eb0403]::panicking::begin_panic<rustc_errors[485cd74d39701405]::ExplicitBug>::{closure#0}, !>
[INFO] [stderr]   10:     0x72a708b1f50d - std[b36e883d67eb0403]::panicking::begin_panic::<rustc_errors[485cd74d39701405]::ExplicitBug>
[INFO] [stderr]   11:     0x72a708b342a1 - <rustc_errors[485cd74d39701405]::diagnostic::BugAbort as rustc_errors[485cd74d39701405]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
[INFO] [stderr]   12:     0x72a709084fdc - <rustc_errors[485cd74d39701405]::DiagCtxtHandle>::span_bug::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span, alloc[b228c160e2f6f380]::string::String>
[INFO] [stderr]   13:     0x72a70910a897 - rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}
[INFO] [stderr]   14:     0x72a7090f006a - rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_opt::<rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}, !>::{closure#0}
[INFO] [stderr]   15:     0x72a7090efefb - rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_context_opt::<rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_opt<rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
[INFO] [stderr]   16:     0x72a707534437 - rustc_middle[8ad6e8ce52578819]::util::bug::span_bug_fmt::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>
[INFO] [stderr]   17:     0x72a70a9d541b - <rustc_mir_build[73684a27b88b946a]::builder::Builder>::build_unwind_tree
[INFO] [stderr]   18:     0x72a70a9cd7cd - rustc_mir_build[73684a27b88b946a]::builder::mir_build
[INFO] [stderr]   19:     0x72a70a007714 - rustc_mir_transform[857cd804783fef4d]::mir_built
[INFO] [stderr]   20:     0x72a70a0076d7 - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 8usize]>>
[INFO] [stderr]   21:     0x72a70a2953d1 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_data_structures[e21ff9714bc20455]::vec_cache::VecCache<rustc_span[26755a3edc0cc6c0]::def_id::LocalDefId, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[67781f9dc633c543]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   22:     0x72a70a294f8d - rustc_query_impl[1e55094a59e290f4]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   23:     0x72a707067185 - rustc_mir_build[73684a27b88b946a]::check_unsafety::check_unsafety
[INFO] [stderr]   24:     0x72a70a8e98a7 - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::check_unsafety::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>
[INFO] [stderr]   25:     0x72a70a8e9b69 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_data_structures[e21ff9714bc20455]::vec_cache::VecCache<rustc_span[26755a3edc0cc6c0]::def_id::LocalDefId, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>, rustc_query_system[67781f9dc633c543]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   26:     0x72a70a8e97d1 - rustc_query_impl[1e55094a59e290f4]::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   27:     0x72a70a49bd32 - rustc_interface[b59e7ee7606ca029]::passes::run_required_analyses
[INFO] [stderr]   28:     0x72a70af2cc9e - rustc_interface[b59e7ee7606ca029]::passes::analysis
[INFO] [stderr]   29:     0x72a70af2cc6f - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>
[INFO] [stderr]   30:     0x72a70af7b355 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_query_system[67781f9dc633c543]::query::caches::SingleCache<rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   31:     0x72a70af7b08e - rustc_query_impl[1e55094a59e290f4]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   32:     0x72a70af701de - rustc_interface[b59e7ee7606ca029]::passes::create_and_enter_global_ctxt::<core[303105738bd0c2ae]::option::Option<rustc_interface[b59e7ee7606ca029]::queries::Linker>, rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
[INFO] [stderr]   33:     0x72a70afdff51 - rustc_interface[b59e7ee7606ca029]::interface::run_compiler::<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}
[INFO] [stderr]   34:     0x72a70aef5087 - std[b36e883d67eb0403]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_with_globals<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_pool_with_globals<rustc_interface[b59e7ee7606ca029]::interface::run_compiler<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
[INFO] [stderr]   35:     0x72a70aef551c - <<std[b36e883d67eb0403]::thread::Builder>::spawn_unchecked_<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_with_globals<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_pool_with_globals<rustc_interface[b59e7ee7606ca029]::interface::run_compiler<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[303105738bd0c2ae]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr]   36:     0x72a70aef6aef - std::sys::pal::unix::thread::Thread::new::thread_start::ha554cc4ba6335b05
[INFO] [stderr]   37:     0x72a70c6c0ac3 - <unknown>
[INFO] [stderr]   38:     0x72a70c751a04 - clone
[INFO] [stderr]   39:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
[INFO] [stderr] 
[INFO] [stderr] note: please make sure that you have updated to the latest nightly
[INFO] [stderr] 
[INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/workdir/rustc-ice-2025-01-01T05_45_32-49.txt`: Read-only file system (os error 30)
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.85.0-nightly (9b5e8b16b 2024-12-19) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] query stack during panic:
[INFO] [stderr] #0 [mir_built] building MIR for `fallback::<impl at src/fallback.rs:75:1: 75:34>::fmt`
[INFO] [stderr] #1 [check_unsafety] unsafety-checking `fallback::<impl at src/fallback.rs:75:1: 75:34>::fmt`
[INFO] [stderr] #2 [analysis] running analysis passes on this crate
[INFO] [stderr] end of query stack
[INFO] [stdout] error: internal compiler error: compiler/rustc_mir_build/src/builder/scope.rs:1724:17: cannot unwind from goto -> bb41
[INFO] [stdout]     --> src/fallback.rs:1394:2
[INFO] [stdout]      |
[INFO] [stdout] 1394 | }
[INFO] [stdout]      |  ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] thread 'rustc' panicked at compiler/rustc_mir_build/src/builder/scope.rs:1724:17:
[INFO] [stderr] Box<dyn Any>
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x72a709981caa - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h636462e57d5ef1e1
[INFO] [stderr]    1:     0x72a70a013cbc - core::fmt::write::h067060808ac50eb9
[INFO] [stderr]    2:     0x72a70af28e11 - std::io::Write::write_fmt::h4674fa2ed7c0dfdd
[INFO] [stderr]    3:     0x72a709981b02 - std::sys::backtrace::BacktraceLock::print::h0c77148acfb0b5e9
[INFO] [stderr]    4:     0x72a709983ffa - std::panicking::default_hook::{{closure}}::h30daa8e7c6ccb09d
[INFO] [stderr]    5:     0x72a709983e43 - std::panicking::default_hook::h25f21dc0f2064615
[INFO] [stderr]    6:     0x72a708aeff28 - std[b36e883d67eb0403]::panicking::update_hook::<alloc[b228c160e2f6f380]::boxed::Box<rustc_driver_impl[be5855d19ccc8b6c]::install_ice_hook::{closure#0}>>::{closure#0}
[INFO] [stderr]    7:     0x72a7099847b8 - std::panicking::rust_panic_with_hook::hc98438687e833605
[INFO] [stderr]    8:     0x72a708b2a341 - std[b36e883d67eb0403]::panicking::begin_panic::<rustc_errors[485cd74d39701405]::ExplicitBug>::{closure#0}
[INFO] [stderr]    9:     0x72a708b1f526 - std[b36e883d67eb0403]::sys::backtrace::__rust_end_short_backtrace::<std[b36e883d67eb0403]::panicking::begin_panic<rustc_errors[485cd74d39701405]::ExplicitBug>::{closure#0}, !>
[INFO] [stderr]   10:     0x72a708b1f50d - std[b36e883d67eb0403]::panicking::begin_panic::<rustc_errors[485cd74d39701405]::ExplicitBug>
[INFO] [stderr]   11:     0x72a708b342a1 - <rustc_errors[485cd74d39701405]::diagnostic::BugAbort as rustc_errors[485cd74d39701405]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
[INFO] [stderr]   12:     0x72a709084fdc - <rustc_errors[485cd74d39701405]::DiagCtxtHandle>::span_bug::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span, alloc[b228c160e2f6f380]::string::String>
[INFO] [stderr]   13:     0x72a70910a897 - rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}
[INFO] [stderr]   14:     0x72a7090f006a - rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_opt::<rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}, !>::{closure#0}
[INFO] [stderr]   15:     0x72a7090efefb - rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_context_opt::<rustc_middle[8ad6e8ce52578819]::ty::context::tls::with_opt<rustc_middle[8ad6e8ce52578819]::util::bug::opt_span_bug_fmt<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
[INFO] [stderr]   16:     0x72a707534437 - rustc_middle[8ad6e8ce52578819]::util::bug::span_bug_fmt::<rustc_span[26755a3edc0cc6c0]::span_encoding::Span>
[INFO] [stderr]   17:     0x72a70a9d541b - <rustc_mir_build[73684a27b88b946a]::builder::Builder>::build_unwind_tree
[INFO] [stderr]   18:     0x72a70a9cd7cd - rustc_mir_build[73684a27b88b946a]::builder::mir_build
[INFO] [stderr]   19:     0x72a70a007714 - rustc_mir_transform[857cd804783fef4d]::mir_built
[INFO] [stderr]   20:     0x72a70a0076d7 - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 8usize]>>
[INFO] [stderr]   21:     0x72a70a2953d1 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_data_structures[e21ff9714bc20455]::vec_cache::VecCache<rustc_span[26755a3edc0cc6c0]::def_id::LocalDefId, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[67781f9dc633c543]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   22:     0x72a70a294f8d - rustc_query_impl[1e55094a59e290f4]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   23:     0x72a707067185 - rustc_mir_build[73684a27b88b946a]::check_unsafety::check_unsafety
[INFO] [stderr]   24:     0x72a70a8e98a7 - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::check_unsafety::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>
[INFO] [stderr]   25:     0x72a70a8e9b69 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_data_structures[e21ff9714bc20455]::vec_cache::VecCache<rustc_span[26755a3edc0cc6c0]::def_id::LocalDefId, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>, rustc_query_system[67781f9dc633c543]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   26:     0x72a70a8e97d1 - rustc_query_impl[1e55094a59e290f4]::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   27:     0x72a70a49bd32 - rustc_interface[b59e7ee7606ca029]::passes::run_required_analyses
[INFO] [stderr]   28:     0x72a70af2cc9e - rustc_interface[b59e7ee7606ca029]::passes::analysis
[INFO] [stderr]   29:     0x72a70af2cc6f - rustc_query_impl[1e55094a59e290f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1e55094a59e290f4]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>
[INFO] [stderr]   30:     0x72a70af7b355 - rustc_query_system[67781f9dc633c543]::query::plumbing::try_execute_query::<rustc_query_impl[1e55094a59e290f4]::DynamicConfig<rustc_query_system[67781f9dc633c543]::query::caches::SingleCache<rustc_middle[8ad6e8ce52578819]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[1e55094a59e290f4]::plumbing::QueryCtxt, false>
[INFO] [stderr]   31:     0x72a70af7b08e - rustc_query_impl[1e55094a59e290f4]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
[INFO] [stderr]   32:     0x72a70af701de - rustc_interface[b59e7ee7606ca029]::passes::create_and_enter_global_ctxt::<core[303105738bd0c2ae]::option::Option<rustc_interface[b59e7ee7606ca029]::queries::Linker>, rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
[INFO] [stderr]   33:     0x72a70afdff51 - rustc_interface[b59e7ee7606ca029]::interface::run_compiler::<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}
[INFO] [stderr]   34:     0x72a70aef5087 - std[b36e883d67eb0403]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_with_globals<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_pool_with_globals<rustc_interface[b59e7ee7606ca029]::interface::run_compiler<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
[INFO] [stderr]   35:     0x72a70aef551c - <<std[b36e883d67eb0403]::thread::Builder>::spawn_unchecked_<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_with_globals<rustc_interface[b59e7ee7606ca029]::util::run_in_thread_pool_with_globals<rustc_interface[b59e7ee7606ca029]::interface::run_compiler<(), rustc_driver_impl[be5855d19ccc8b6c]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[303105738bd0c2ae]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stderr]   36:     0x72a70aef6aef - std::sys::pal::unix::thread::Thread::new::thread_start::ha554cc4ba6335b05
[INFO] [stderr]   37:     0x72a70c6c0ac3 - <unknown>
[INFO] [stderr]   38:     0x72a70c751a04 - clone
[INFO] [stderr]   39:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
[INFO] [stderr] 
[INFO] [stderr] note: please make sure that you have updated to the latest nightly
[INFO] [stderr] 
[INFO] [stderr] warning: the ICE couldn't be written to `/opt/rustwide/workdir/rustc-ice-2025-01-01T05_45_32-49.txt`: Read-only file system (os error 30)
[INFO] [stderr] 
[INFO] [stderr] note: rustc 1.85.0-nightly (9b5e8b16b 2024-12-19) running on x86_64-unknown-linux-gnu
[INFO] [stderr] 
[INFO] [stderr] note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2
[INFO] [stderr] 
[INFO] [stderr] note: some of the compiler flags provided by cargo are hidden
[INFO] [stderr] 
[INFO] [stderr] query stack during panic:
[INFO] [stderr] #0 [mir_built] building MIR for `fallback::op`
[INFO] [stderr] #1 [check_unsafety] unsafety-checking `fallback::op`
[INFO] [stderr] #2 [analysis] running analysis passes on this crate
[INFO] [stderr] end of query stack
[INFO] [stderr] error: could not compile `proc-macro2-impersonated` (lib); 63 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/9b5e8b16bd1c4acf4cf8e6880368314cf021a987/bin/rustc --crate-name proc_macro2_impersonated --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="proc-macro"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("default", "nightly", "proc-macro", "span-locations"))' -C metadata=1a5ac8526cf94021 -C extra-filename=-c0cda9862feb1766 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-d62b414347687705.rmeta --cap-lints=forbid -Dtail-expr-drop-order --cfg use_proc_macro --cfg proc_macro_span` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "0a3eab2a3d74db94fba33df9e3640f589bb0e33d3144e63c78d319f9301c96f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a3eab2a3d74db94fba33df9e3640f589bb0e33d3144e63c78d319f9301c96f8", kill_on_drop: false }`
[INFO] [stdout] 0a3eab2a3d74db94fba33df9e3640f589bb0e33d3144e63c78d319f9301c96f8