[INFO] cloning repository https://github.com/Spydr06/lambda-calculus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Spydr06/lambda-calculus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpydr06%2Flambda-calculus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpydr06%2Flambda-calculus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8537652a190741ec950be1e133030aa37e1e306
[INFO] testing Spydr06/lambda-calculus against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpydr06%2Flambda-calculus" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Spydr06/lambda-calculus
[INFO] finished tweaking git repo https://github.com/Spydr06/lambda-calculus
[INFO] tweaked toml for git repo https://github.com/Spydr06/lambda-calculus written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Spydr06/lambda-calculus on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Spydr06/lambda-calculus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4dade55be8fd0f75183c8f259b925984a275dd6c827c23034240858006561dd
[INFO] running `Command { std: "docker" "start" "-a" "c4dade55be8fd0f75183c8f259b925984a275dd6c827c23034240858006561dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4dade55be8fd0f75183c8f259b925984a275dd6c827c23034240858006561dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4dade55be8fd0f75183c8f259b925984a275dd6c827c23034240858006561dd", kill_on_drop: false }`
[INFO] [stdout] c4dade55be8fd0f75183c8f259b925984a275dd6c827c23034240858006561dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5ce8291f5cd6558279687f401d6d81a10f1073eae333802aedd3fdecabbba21
[INFO] running `Command { std: "docker" "start" "-a" "d5ce8291f5cd6558279687f401d6d81a10f1073eae333802aedd3fdecabbba21", kill_on_drop: false }`
[INFO] [stderr]    Compiling lambda-calculus v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:117:15
[INFO] [stdout]     |
[INFO] [stdout] 117 |         while let Some(&ch) = input.peek() && ch.is_whitespace() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:140:23
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 while let Some(&next) = input.peek() && next.is_numeric() {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:151:23
[INFO] [stdout]     |
[INFO] [stdout] 151 |                 while let Some(&next) = input.peek() && char_is_ident(next) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:158:27
[INFO] [stdout]     |
[INFO] [stdout] 158 |                     while let Some(&ch) = input.peek() && ch != '\n' {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:330:15
[INFO] [stdout]     |
[INFO] [stdout] 330 |         while let Some(next) = self.peek() && next.as_ref() != &Token::RightBracket {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:366:15
[INFO] [stdout]     |
[INFO] [stdout] 366 |         while let Some(next) = self.peek() && next.starts_expr() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:399:12
[INFO] [stdout]     |
[INFO] [stdout] 399 |         if let Some(next) = self.peek() && next.as_ref() == &Token::Comma {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `result_flattening` has been stable since 1.89.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(result_flattening)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lambda-calculus` (bin "lambda-calculus") due to 7 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d5ce8291f5cd6558279687f401d6d81a10f1073eae333802aedd3fdecabbba21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ce8291f5cd6558279687f401d6d81a10f1073eae333802aedd3fdecabbba21", kill_on_drop: false }`
[INFO] [stdout] d5ce8291f5cd6558279687f401d6d81a10f1073eae333802aedd3fdecabbba21