[INFO] cloning repository https://github.com/zeta-lang/zeta
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zeta-lang/zeta" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15c0f188e79beb3b9a50b64269ece42ed4887b12
[INFO] checking zeta-lang/zeta against try#b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8 for pr-78363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeta-lang%2Fzeta" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zeta-lang/zeta on toolchain b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zeta-lang/zeta
[INFO] finished tweaking git repo https://github.com/zeta-lang/zeta
[INFO] tweaked toml for git repo https://github.com/zeta-lang/zeta written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/zeta-lang/zeta already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "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] 0e9a2a32a95decba859df2306c90cbd21dadfba9bca7c07311821bd5006739ac
[INFO] running `Command { std: "docker" "start" "-a" "0e9a2a32a95decba859df2306c90cbd21dadfba9bca7c07311821bd5006739ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e9a2a32a95decba859df2306c90cbd21dadfba9bca7c07311821bd5006739ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e9a2a32a95decba859df2306c90cbd21dadfba9bca7c07311821bd5006739ac", kill_on_drop: false }`
[INFO] [stdout] 0e9a2a32a95decba859df2306c90cbd21dadfba9bca7c07311821bd5006739ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] db029d67ac1eba32a9aac1f0246e12744057ef6a09b80508d6473a666059595c
[INFO] running `Command { std: "docker" "start" "-a" "db029d67ac1eba32a9aac1f0246e12744057ef6a09b80508d6473a666059595c", kill_on_drop: false }`
[INFO] [stderr]     Checking zeta v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:121:7
[INFO] [stdout]     |
[INFO] [stdout] 121 |   and(using_pair(l, r, 0, 0), e)
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:116:58
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub const fn outside_pair<L, R, E> (l: L, r: R, e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:51:48
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub const fn and<A, B> (mut a: A, mut b: B) -> impl SyncPredicate
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:66:100
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub const fn using_pair<L, R> (mut l: L, mut r: R, mut open_count: usize, desired_count: usize) -> impl SyncPredicate
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:46:42
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub const fn op_of (eos: &[Operator]) -> impl SyncPredicate + '_ {
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:58:47
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub const fn or<A, B> (mut a: A, mut b: B) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:42:35
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub const fn op (eo: Operator) -> impl SyncPredicate {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:38:41
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub const fn kw_of (eks: &[Keyword]) -> impl SyncPredicate + '_ {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:34:34
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub const fn kw (ek: Keyword) -> impl SyncPredicate {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:79:47
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub const fn close_pair<L, R> (l: L, r: R) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:86:47
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub const fn enter_pair<L, R> (l: L, r: R) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:93:71
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub const fn close_pair_or<L, R, E> (mut l: L, mut r: R, mut e: E) -> impl SyncPredicate
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:113:7
[INFO] [stdout]     |
[INFO] [stdout] 113 |   and(using_pair(l, r, 1, 1), e)
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:108:57
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub const fn within_pair<L, R, E> (l: L, r: R, e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub const fn outside_delims<E> (e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:121:7
[INFO] [stdout]     |
[INFO] [stdout] 121 |   and(using_pair(l, r, 0, 0), e)
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:116:58
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub const fn outside_pair<L, R, E> (l: L, r: R, e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:51:48
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub const fn and<A, B> (mut a: A, mut b: B) -> impl SyncPredicate
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:66:100
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub const fn using_pair<L, R> (mut l: L, mut r: R, mut open_count: usize, desired_count: usize) -> impl SyncPredicate
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:46:42
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub const fn op_of (eos: &[Operator]) -> impl SyncPredicate + '_ {
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:58:47
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub const fn or<A, B> (mut a: A, mut b: B) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:42:35
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub const fn op (eo: Operator) -> impl SyncPredicate {
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:38:41
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub const fn kw_of (eks: &[Keyword]) -> impl SyncPredicate + '_ {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:34:34
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub const fn kw (ek: Keyword) -> impl SyncPredicate {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:79:47
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub const fn close_pair<L, R> (l: L, r: R) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:86:47
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub const fn enter_pair<L, R> (l: L, r: R) -> impl SyncPredicate
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]   --> src/lib/frontend/parser/pred.rs:93:71
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub const fn close_pair_or<L, R, E> (mut l: L, mut r: R, mut e: E) -> impl SyncPredicate
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]    = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:113:7
[INFO] [stdout]     |
[INFO] [stdout] 113 |   and(using_pair(l, r, 1, 1), e)
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:108:57
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub const fn within_pair<L, R, E> (l: L, r: R, e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` is not allowed in constant functions
[INFO] [stdout]    --> src/lib/frontend/parser/pred.rs:125:42
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub const fn outside_delims<E> (e: E) -> impl SyncPredicate
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #77463 <https://github.com/rust-lang/rust/issues/77463> for more information
[INFO] [stdout]     = help: add `#![feature(const_impl_trait)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 15 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zeta`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 15 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "db029d67ac1eba32a9aac1f0246e12744057ef6a09b80508d6473a666059595c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db029d67ac1eba32a9aac1f0246e12744057ef6a09b80508d6473a666059595c", kill_on_drop: false }`
[INFO] [stdout] db029d67ac1eba32a9aac1f0246e12744057ef6a09b80508d6473a666059595c