[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] building Nyrox/experimental-lang against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNyrox%2Fexperimental-lang" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nyrox/experimental-lang on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "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-0/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" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b2327599edcca686c2edac879c98f98380fc543eeac8f245c6502f633d6d819
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1b2327599edcca686c2edac879c98f98380fc543eeac8f245c6502f633d6d819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b2327599edcca686c2edac879c98f98380fc543eeac8f245c6502f633d6d819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b2327599edcca686c2edac879c98f98380fc543eeac8f245c6502f633d6d819", kill_on_drop: false }`
[INFO] [stdout] 1b2327599edcca686c2edac879c98f98380fc543eeac8f245c6502f633d6d819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--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] f8d1389e5b5438b20a2603e1357969a27683a1e4017cff83ad1cc43e147a07b5
[INFO] running `Command { std: "docker" "start" "-a" "f8d1389e5b5438b20a2603e1357969a27683a1e4017cff83ad1cc43e147a07b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling experimental-lang v0.1.0 (/opt/rustwide/workdir)
[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[E0599]: no method named `fold_first` found for struct `Map<std::slice::Iter<'_, untyped::Expr>, [closure@src/ast/untyped.rs:128:26: 128:38]>` in the current scope
[INFO] [stdout]    --> src/ast/untyped.rs:129:22
[INFO] [stdout]     |
[INFO] [stdout] 129 |                     .fold_first(|s1, s2| s1.encompass(s2))
[INFO] [stdout]     |                      ^^^^^^^^^^ method not found in `Map<std::slice::Iter<'_, untyped::Expr>, [closure@src/ast/untyped.rs:128:26: 128:38]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map<std::slice::Iter<'_, untyped::Expr>, [closure@src/ast/untyped.rs:141:22: 141:34]>` in the current scope
[INFO] [stdout]    --> src/ast/untyped.rs:142:18
[INFO] [stdout]     |
[INFO] [stdout] 142 |                 .fold_first(|s1, s2| s1.encompass(s2))
[INFO] [stdout]     |                  ^^^^^^^^^^ method not found in `Map<std::slice::Iter<'_, untyped::Expr>, [closure@src/ast/untyped.rs:141:22: 141:34]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `experimental-lang`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f8d1389e5b5438b20a2603e1357969a27683a1e4017cff83ad1cc43e147a07b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8d1389e5b5438b20a2603e1357969a27683a1e4017cff83ad1cc43e147a07b5", kill_on_drop: false }`
[INFO] [stdout] f8d1389e5b5438b20a2603e1357969a27683a1e4017cff83ad1cc43e147a07b5
