[INFO] fetching crate observation-tools 0.0.12...
[INFO] building observation-tools-0.0.12 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate observation-tools 0.0.12 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate observation-tools 0.0.12
[INFO] finished tweaking crates.io crate observation-tools 0.0.12
[INFO] tweaked toml for crates.io crate observation-tools 0.0.12 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate observation-tools 0.0.12 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 390 packages to latest compatible versions
[INFO] [stderr]       Adding async-channel v1.9.0 (available: v2.5.0)
[INFO] [stderr]       Adding base64 v0.21.7 (available: v0.22.1)
[INFO] [stderr]       Adding cached v0.48.1 (available: v0.56.0)
[INFO] [stderr]       Adding derive_builder v0.12.0 (available: v0.20.2)
[INFO] [stderr]       Adding env_logger v0.10.2 (available: v0.11.8)
[INFO] [stderr]       Adding image v0.24.9 (available: v0.25.8)
[INFO] [stderr]       Adding itertools v0.12.1 (available: v0.14.0)
[INFO] [stderr]       Adding keyring v2.3.3 (available: v3.6.3)
[INFO] [stderr]       Adding nalgebra v0.32.6 (available: v0.34.1)
[INFO] [stderr]       Adding oauth2 v4.4.2 (available: v5.0.0)
[INFO] [stderr]       Adding protobuf v3.2.0 (available: v3.7.2)
[INFO] [stderr]       Adding protobuf-codegen v3.2.0 (available: v3.7.2)
[INFO] [stderr]       Adding protobuf-parse v3.2.0 (available: v3.7.2)
[INFO] [stderr]       Adding protobuf-support v3.2.0 (available: v3.7.2)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.23)
[INFO] [stderr]       Adding serde v1.0.171 (available: v1.0.228)
[INFO] [stderr]       Adding serde_derive v1.0.171 (available: v1.0.228)
[INFO] [stderr]       Adding serde_json v1.0.109 (available: v1.0.145)
[INFO] [stderr]       Adding serde_path_to_error v0.1.14 (available: v0.1.20)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] [stderr]       Adding time v0.3.26 (available: v0.3.44)
[INFO] [stderr]       Adding time-core v0.1.1 (available: v0.1.6)
[INFO] [stderr]       Adding time-macros v0.2.12 (available: v0.2.24)
[INFO] [stderr]       Adding wasm-bindgen-derive v0.2.1 (available: v0.3.0)
[INFO] [stderr]       Adding zvariant_utils v1.0.1 (available: v1.1.1)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1f2a05c486ab38bd079d910d5ebbd0cc1fc87e463ffbfb8f8f154d283f2358d8
[INFO] running `Command { std: "docker" "start" "-a" "1f2a05c486ab38bd079d910d5ebbd0cc1fc87e463ffbfb8f8f154d283f2358d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f2a05c486ab38bd079d910d5ebbd0cc1fc87e463ffbfb8f8f154d283f2358d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f2a05c486ab38bd079d910d5ebbd0cc1fc87e463ffbfb8f8f154d283f2358d8", kill_on_drop: false }`
[INFO] [stdout] 1f2a05c486ab38bd079d910d5ebbd0cc1fc87e463ffbfb8f8f154d283f2358d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f88348e5024dc188506a00a2e06e45ff43030aecf64973edfa29ae6e7298360c
[INFO] running `Command { std: "docker" "start" "-a" "f88348e5024dc188506a00a2e06e45ff43030aecf64973edfa29ae6e7298360c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.171
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.109
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling wasm-bindgen v0.2.104
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.104
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/4987e9d4227139400384ab59296ffee3b0fb1183/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.109/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="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=31890f87bf4acee8 -C extra-filename=-4b6bc6382a3cc51c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-7a2436df3ae454d4.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-0de5fe2fc9d60ab7.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-6ac3b87590d2322c.rmeta --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" "f88348e5024dc188506a00a2e06e45ff43030aecf64973edfa29ae6e7298360c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f88348e5024dc188506a00a2e06e45ff43030aecf64973edfa29ae6e7298360c", kill_on_drop: false }`
[INFO] [stdout] f88348e5024dc188506a00a2e06e45ff43030aecf64973edfa29ae6e7298360c