[INFO] cloning repository https://github.com/Nyrox/experimental-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nyrox/experimental-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNyrox%2Fexperimental-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNyrox%2Fexperimental-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] edfc064a438e424bca19f37633b1599562c7cf23
[INFO] testing Nyrox/experimental-lang against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNyrox%2Fexperimental-lang" "/workspace/builds/worker-35/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-35/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nyrox/experimental-lang on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nyrox/experimental-lang
[INFO] finished tweaking git repo https://github.com/Nyrox/experimental-lang
[INFO] tweaked toml for git repo https://github.com/Nyrox/experimental-lang written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] crate git repo https://github.com/Nyrox/experimental-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1de6647187264935b503257e513b70d6177804ca68964ee3a46be58f3cf045b0
[INFO] running `Command { std: "docker" "start" "-a" "1de6647187264935b503257e513b70d6177804ca68964ee3a46be58f3cf045b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1de6647187264935b503257e513b70d6177804ca68964ee3a46be58f3cf045b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1de6647187264935b503257e513b70d6177804ca68964ee3a46be58f3cf045b0", kill_on_drop: false }`
[INFO] [stdout] 1de6647187264935b503257e513b70d6177804ca68964ee3a46be58f3cf045b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 688bf0366697727e87f2f6fb546bcfe285abb17b52fb212947cbf32f4ac53dad
[INFO] running `Command { std: "docker" "start" "-a" "688bf0366697727e87f2f6fb546bcfe285abb17b52fb212947cbf32f4ac53dad", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling experimental-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0437]: type `Ok` is not a member of trait `Try`
[INFO] [stdout]    --> src/typecheck/judgement.rs:188:5
[INFO] [stdout]     |
[INFO] [stdout] 188 |     type Ok = (T, Vec<Constraint>);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `Try`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0437]: type `Error` is not a member of trait `Try`
[INFO] [stdout]    --> src/typecheck/judgement.rs:189:5
[INFO] [stdout]     |
[INFO] [stdout] 189 |     type Error = TypeCheckingError;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `Try`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `into_result` is not a member of trait `Try`
[INFO] [stdout]    --> src/typecheck/judgement.rs:191:5
[INFO] [stdout]     |
[INFO] [stdout] 191 | /     fn into_result(self) -> Result<Self::Ok, TypeCheckingError> {
[INFO] [stdout] 192 | |         match self {
[INFO] [stdout] 193 | |             TypeJudgement::Typed { inner, constraints } => Ok((inner, constraints)),
[INFO] [stdout] 194 | |             TypeJudgement::Error(e) => Err(e),
[INFO] [stdout] 195 | |         }
[INFO] [stdout] 196 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Try`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `from_ok` is not a member of trait `Try`
[INFO] [stdout]    --> src/typecheck/judgement.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 | /     fn from_ok((inner, constraints): Self::Ok) -> Self {
[INFO] [stdout] 199 | |         TypeJudgement::Typed { inner, constraints }
[INFO] [stdout] 200 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Try`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0407]: method `from_error` is not a member of trait `Try`
[INFO] [stdout]    --> src/typecheck/judgement.rs:202:5
[INFO] [stdout]     |
[INFO] [stdout] 202 | /     fn from_error(err: TypeCheckingError) -> Self {
[INFO] [stdout] 203 | |         TypeJudgement::Error(err)
[INFO] [stdout] 204 | |     }
[INFO] [stdout]     | |_____^ not a member of trait `Try`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(iterator_fold_self)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Position`, `Span`
[INFO] [stdout]  --> src/parser/recdec.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{Position, Span, Spanned, Token};
[INFO] [stdout]   |             ^^^^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `untyped::TypeDeclaration`
[INFO] [stdout]    --> src/typecheck/mod.rs:795:9
[INFO] [stdout]     |
[INFO] [stdout] 795 |     use untyped::TypeDeclaration;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]  --> src/typecheck/judgement.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Try;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'try_trait_v2'
[INFO] [stdout]    --> src/typecheck/judgement.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<T> Try for TypeJudgement<T> {
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #84277 <https://github.com/rust-lang/rust/issues/84277> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `Self`
[INFO] [stdout]    --> src/typecheck/judgement.rs:191:42
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn into_result(self) -> Result<Self::Ok, TypeCheckingError> {
[INFO] [stdout]     |                                          ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `experimental-lang`
[INFO] [stdout] error[E0220]: associated type `Ok` not found for `Self`
[INFO] [stdout]    --> src/typecheck/judgement.rs:198:44
[INFO] [stdout]     |
[INFO] [stdout] 198 |     fn from_ok((inner, constraints): Self::Ok) -> Self {
[INFO] [stdout]     |                                            ^^ associated type `Ok` not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 13 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] Some errors have detailed explanations: E0220, E0407, E0437, E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0220`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "688bf0366697727e87f2f6fb546bcfe285abb17b52fb212947cbf32f4ac53dad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "688bf0366697727e87f2f6fb546bcfe285abb17b52fb212947cbf32f4ac53dad", kill_on_drop: false }`
[INFO] [stdout] 688bf0366697727e87f2f6fb546bcfe285abb17b52fb212947cbf32f4ac53dad
