[INFO] cloning repository https://github.com/jwong101/lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jwong101/lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwong101%2Flox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwong101%2Flox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7bbfa395fdb47dbe983864c303e881425e72fc84
[INFO] testing jwong101/lox against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwong101%2Flox" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jwong101/lox
[INFO] finished tweaking git repo https://github.com/jwong101/lox
[INFO] tweaked toml for git repo https://github.com/jwong101/lox written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jwong101/lox on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jwong101/lox 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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df7348f813f648104fa073db837c99967e4039a8feb0cd67a7cb8ea694c20110
[INFO] running `Command { std: "docker" "start" "-a" "df7348f813f648104fa073db837c99967e4039a8feb0cd67a7cb8ea694c20110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df7348f813f648104fa073db837c99967e4039a8feb0cd67a7cb8ea694c20110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df7348f813f648104fa073db837c99967e4039a8feb0cd67a7cb8ea694c20110", kill_on_drop: false }`
[INFO] [stdout] df7348f813f648104fa073db837c99967e4039a8feb0cd67a7cb8ea694c20110
[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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1edd248f51616e739364f0ac7f3daeb72ab72c13ae4ccb85fdfb5878e6f22ea6
[INFO] running `Command { std: "docker" "start" "-a" "1edd248f51616e739364f0ac7f3daeb72ab72c13ae4ccb85fdfb5878e6f22ea6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling os_str_bytes v6.1.0
[INFO] [stderr]    Compiling hashbrown v0.12.1
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling once_cell v1.12.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling clap_derive v3.2.7
[INFO] [stderr]    Compiling thiserror v1.0.31
[INFO] [stderr]    Compiling clap v3.2.8
[INFO] [stderr]    Compiling lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/parser.rs:149:24
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     && let Ok(expr) = self.expression()
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(is_some_with, let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[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/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(is_some_with, let_chains)]
[INFO] [stdout]   |                          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `is_some_with`
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(is_some_with, let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a feature with a similar name: `is_some_and`
[INFO] [stdout]   |
[INFO] [stdout] 4 - #![feature(is_some_with, let_chains)]
[INFO] [stdout] 4 + #![feature(is_some_and, let_chains)]
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lox` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1edd248f51616e739364f0ac7f3daeb72ab72c13ae4ccb85fdfb5878e6f22ea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1edd248f51616e739364f0ac7f3daeb72ab72c13ae4ccb85fdfb5878e6f22ea6", kill_on_drop: false }`
[INFO] [stdout] 1edd248f51616e739364f0ac7f3daeb72ab72c13ae4ccb85fdfb5878e6f22ea6
