[INFO] fetching crate rust_observer 0.2.2...
[INFO] building rust_observer-0.2.2 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rust_observer 0.2.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rust_observer 0.2.2
[INFO] finished tweaking crates.io crate rust_observer 0.2.2
[INFO] tweaked toml for crates.io crate rust_observer 0.2.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_observer 0.2.2 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 186 packages to latest compatible versions
[INFO] [stderr]       Adding sysinfo v0.31.4 (available: v0.37.1)
[INFO] [stderr]       Adding toml v0.8.23 (available: v0.9.7)
[INFO] [stderr]       Adding tonic v0.12.3 (available: v0.14.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1295613683af3ff522698dc2d5c603e06e861babebb841c0ae80f7d0a5ffd59
[INFO] running `Command { std: "docker" "start" "-a" "a1295613683af3ff522698dc2d5c603e06e861babebb841c0ae80f7d0a5ffd59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1295613683af3ff522698dc2d5c603e06e861babebb841c0ae80f7d0a5ffd59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1295613683af3ff522698dc2d5c603e06e861babebb841c0ae80f7d0a5ffd59", kill_on_drop: false }`
[INFO] [stdout] a1295613683af3ff522698dc2d5c603e06e861babebb841c0ae80f7d0a5ffd59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 048b7c76eb5f041e4ce04182107f7e0f28bf97a33f68a8e3913b6d20aa07909f
[INFO] running `Command { std: "docker" "start" "-a" "048b7c76eb5f041e4ce04182107f7e0f28bf97a33f68a8e3913b6d20aa07909f", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling linux-raw-sys v0.11.0
[INFO] [stderr]    Compiling fixedbitset v0.5.7
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling multimap v0.10.1
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling toml_parser v1.0.3
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling petgraph v0.7.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling toml_edit v0.23.6
[INFO] [stderr]    Compiling async-stream v0.3.6
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr] error: could not compile `regex-syntax` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/4987e9d4227139400384ab59296ffee3b0fb1183/bin/rustc --crate-name regex_syntax --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regex-syntax-0.8.6/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="std"' --cfg 'feature="unicode-bool"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("arbitrary", "default", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"))' -C metadata=7d110477e417c079 -C extra-filename=-92d469030c6e83d7 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "048b7c76eb5f041e4ce04182107f7e0f28bf97a33f68a8e3913b6d20aa07909f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048b7c76eb5f041e4ce04182107f7e0f28bf97a33f68a8e3913b6d20aa07909f", kill_on_drop: false }`
[INFO] [stdout] 048b7c76eb5f041e4ce04182107f7e0f28bf97a33f68a8e3913b6d20aa07909f