[INFO] cloning repository https://github.com/gsongsong/antlr4rust_quickstart
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gsongsong/antlr4rust_quickstart" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgsongsong%2Fantlr4rust_quickstart", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgsongsong%2Fantlr4rust_quickstart'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 541cd68c7587e62263242df5a2998a5e9dff71ce
[INFO] testing gsongsong/antlr4rust_quickstart 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%2Fgsongsong%2Fantlr4rust_quickstart" "/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/gsongsong/antlr4rust_quickstart
[INFO] finished tweaking git repo https://github.com/gsongsong/antlr4rust_quickstart
[INFO] tweaked toml for git repo https://github.com/gsongsong/antlr4rust_quickstart written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gsongsong/antlr4rust_quickstart 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/gsongsong/antlr4rust_quickstart 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] d852ae5b015bb876e03fdf0a01ac7c5afc5af75c4a083be65c8c703b8b301469
[INFO] running `Command { std: "docker" "start" "-a" "d852ae5b015bb876e03fdf0a01ac7c5afc5af75c4a083be65c8c703b8b301469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d852ae5b015bb876e03fdf0a01ac7c5afc5af75c4a083be65c8c703b8b301469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d852ae5b015bb876e03fdf0a01ac7c5afc5af75c4a083be65c8c703b8b301469", kill_on_drop: false }`
[INFO] [stdout] d852ae5b015bb876e03fdf0a01ac7c5afc5af75c4a083be65c8c703b8b301469
[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] 781f201237c6573e58615aa7dc21a41cdbe87fe63ba482ebaf01e27f68d14f1c
[INFO] running `Command { std: "docker" "start" "-a" "781f201237c6573e58615aa7dc21a41cdbe87fe63ba482ebaf01e27f68d14f1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling once_cell v1.2.0
[INFO] [stderr]    Compiling uuid v0.6.5
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling murmur3 v0.4.1
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling antlr-rust v0.1.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/antlr-rust-0.1.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `raw`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/antlr-rust-0.1.1/src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(raw)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `antlr-rust` (lib) due to 2 previous errors
[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] running `Command { std: "docker" "inspect" "781f201237c6573e58615aa7dc21a41cdbe87fe63ba482ebaf01e27f68d14f1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "781f201237c6573e58615aa7dc21a41cdbe87fe63ba482ebaf01e27f68d14f1c", kill_on_drop: false }`
[INFO] [stdout] 781f201237c6573e58615aa7dc21a41cdbe87fe63ba482ebaf01e27f68d14f1c