[INFO] fetching crate pycc-rs 0.0.4...
[INFO] testing pycc-rs-0.0.4 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate pycc-rs 0.0.4 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate pycc-rs 0.0.4
[INFO] finished tweaking crates.io crate pycc-rs 0.0.4
[INFO] tweaked toml for crates.io crate pycc-rs 0.0.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pycc-rs 0.0.4 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pycc-rs 0.0.4 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded py-codegen-llvm v0.0.4
[INFO] [stderr]   Downloaded py-lex v0.0.3
[INFO] [stderr]   Downloaded py-codegen v0.0.4
[INFO] [stderr]   Downloaded py-ir v0.0.4
[INFO] [stderr]   Downloaded colored v2.1.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.88
[INFO] [stderr]   Downloaded terl v0.0.3
[INFO] [stderr]   Downloaded anstyle-parse v0.2.5
[INFO] [stderr]   Downloaded anstyle-query v1.1.1
[INFO] [stderr]   Downloaded colorchoice v1.0.2
[INFO] [stderr]   Downloaded anstyle v1.0.8
[INFO] [stderr]   Downloaded clap_derive v4.5.18
[INFO] [stderr]   Downloaded anstream v0.6.15
[INFO] [stderr]   Downloaded clap v4.5.20
[INFO] [stderr]   Downloaded llvm-sys v180.0.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.64
[INFO] [stderr]   Downloaded clap_builder v4.5.20
[INFO] [stderr]   Downloaded syn v2.0.79
[INFO] [stderr]   Downloaded py-ast v0.0.4
[INFO] [stderr]   Downloaded cc v1.1.30
[INFO] [stderr]   Downloaded regex-lite v0.1.6
[INFO] [stderr]   Downloaded semver v1.0.23
[INFO] [stderr]   Downloaded thiserror v1.0.64
[INFO] [stderr]   Downloaded clap_lex v0.7.2
[INFO] [stderr]   Downloaded py-declare v0.0.4
[INFO] [stderr]   Downloaded inkwell v0.5.0
[INFO] [stderr]   Downloaded py-codegen-c v0.0.4
[INFO] [stderr]   Downloaded inkwell_internals v0.10.0
[INFO] [stderr]   Downloaded once_cell v1.20.2
[INFO] [stderr]   Downloaded serde_json v1.0.128
[INFO] [stderr]   Downloaded anstyle-wincon v3.0.4
[INFO] [stderr]   Downloaded base32 v0.5.1
[INFO] [stderr]   Downloaded libc v0.2.160
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 187f3c9549336076681cddb21a0fd16f7f15c4a7d44a7cbfe8e2ab917415871a
[INFO] running `Command { std: "docker" "start" "-a" "187f3c9549336076681cddb21a0fd16f7f15c4a7d44a7cbfe8e2ab917415871a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "187f3c9549336076681cddb21a0fd16f7f15c4a7d44a7cbfe8e2ab917415871a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "187f3c9549336076681cddb21a0fd16f7f15c4a7d44a7cbfe8e2ab917415871a", kill_on_drop: false }`
[INFO] [stdout] 187f3c9549336076681cddb21a0fd16f7f15c4a7d44a7cbfe8e2ab917415871a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 148f133e1712feae87cb6effd55fbc833a28c485842165e83764e2f0b3f772ba
[INFO] running `Command { std: "docker" "start" "-a" "148f133e1712feae87cb6effd55fbc833a28c485842165e83764e2f0b3f772ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.88
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]    Compiling anyhow v1.0.89
[INFO] [stderr]    Compiling cc v1.1.30
[INFO] [stderr]    Compiling regex-lite v0.1.6
[INFO] [stderr]    Compiling colored v2.1.0
[INFO] [stderr]    Compiling libc v0.2.160
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling terl v0.0.3
[INFO] [stderr]    Compiling thiserror v1.0.64
[INFO] [stderr]    Compiling anstyle-parse v0.2.5
[INFO] [stderr]    Compiling colorchoice v1.0.2
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling anstyle-query v1.1.1
[INFO] [stderr]    Compiling anstyle v1.0.8
[INFO] [stderr]    Compiling inkwell v0.5.0
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling anstream v0.6.15
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling clap_lex v0.7.2
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling base32 v0.5.1
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling clap_builder v4.5.20
[INFO] [stderr]    Compiling llvm-sys v180.0.0
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]    Compiling inkwell_internals v0.10.0
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]    Compiling clap v4.5.20
[INFO] [stderr]    Compiling py-lex v0.0.3
[INFO] [stderr]    Compiling py-ir v0.0.4
[INFO] [stderr]    Compiling py-codegen v0.0.4
[INFO] [stderr]    Compiling py-declare v0.0.4
[INFO] [stderr]    Compiling py-codegen-c v0.0.4
[INFO] [stderr]    Compiling py-codegen-llvm v0.0.4
[INFO] [stderr]    Compiling py-ast v0.0.4
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/py-ast-0.0.4/src/parse/expr.rs:300:28
[INFO] [stdout]     |
[INFO] [stdout] 300 |                         && let Some(rb) = p.r#match(RPU(Operators::BracketR)).apply(mapper::Try)?
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `py-ast` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "148f133e1712feae87cb6effd55fbc833a28c485842165e83764e2f0b3f772ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "148f133e1712feae87cb6effd55fbc833a28c485842165e83764e2f0b3f772ba", kill_on_drop: false }`
[INFO] [stdout] 148f133e1712feae87cb6effd55fbc833a28c485842165e83764e2f0b3f772ba