[INFO] fetching crate n-observer-cffi 0.1.0...
[INFO] checking n-observer-cffi-0.1.0 against master#bbe853615821442ef11d6cd42a30a73432b38d89 for pr-154205
[INFO] extracting crate n-observer-cffi 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate n-observer-cffi 0.1.0
[INFO] finished tweaking crates.io crate n-observer-cffi 0.1.0
[INFO] tweaked toml for crates.io crate n-observer-cffi 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate n-observer-cffi 0.1.0 on toolchain bbe853615821442ef11d6cd42a30a73432b38d89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate n-observer-cffi 0.1.0 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" "+bbe853615821442ef11d6cd42a30a73432b38d89" "fetch" "--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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rs-schema-derive-impl v0.1.0
[INFO] [stderr]   Downloaded rs-schema-derive v0.1.0
[INFO] [stderr]   Downloaded n-observer v0.1.2
[INFO] [stderr]   Downloaded n-observer-cffi-impl v0.1.0
[INFO] [stderr]   Downloaded serial_test_derive v3.2.0
[INFO] [stderr]   Downloaded sdd v3.0.10
[INFO] [stderr]   Downloaded serial_test v3.2.0
[INFO] [stderr]   Downloaded async-cffi v0.1.1
[INFO] [stderr]   Downloaded derive_builder_macro v0.20.2
[INFO] [stderr]   Downloaded rs-schema v1.0.0
[INFO] [stderr]   Downloaded scc v2.4.0
[INFO] [stderr]   Downloaded derive_builder_core v0.20.2
[INFO] [stderr]   Downloaded derive_builder v0.20.2
[INFO] [stderr]   Downloaded pest_derive v2.8.4
[INFO] [stderr]   Downloaded zmij v1.0.2
[INFO] [stderr]   Downloaded ucd-trie v0.1.7
[INFO] [stderr]   Downloaded pest v2.8.4
[INFO] [stderr]   Downloaded handlebars v6.3.2
[INFO] [stderr]   Downloaded serde_json v1.0.148
[INFO] [stderr]   Downloaded pest_meta v2.8.4
[INFO] [stderr]   Downloaded async-cffi-codegen v0.1.0
[INFO] [stderr]   Downloaded num-modular v0.6.1
[INFO] [stderr]   Downloaded num-order v1.2.0
[INFO] [stderr]   Downloaded pest_generator v2.8.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.104
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48a68e7d8d6e01cc1a01329396fc71f0e6187a683fc6f51137b7b94935f911fd
[INFO] running `Command { std: "docker" "start" "-a" "48a68e7d8d6e01cc1a01329396fc71f0e6187a683fc6f51137b7b94935f911fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48a68e7d8d6e01cc1a01329396fc71f0e6187a683fc6f51137b7b94935f911fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48a68e7d8d6e01cc1a01329396fc71f0e6187a683fc6f51137b7b94935f911fd", kill_on_drop: false }`
[INFO] [stdout] 48a68e7d8d6e01cc1a01329396fc71f0e6187a683fc6f51137b7b94935f911fd
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b107ade7c3a93a4afb2ae5ca4d20629dfb7a3ee5ef367c799003f915e0984c6
[INFO] running `Command { std: "docker" "start" "-a" "9b107ade7c3a93a4afb2ae5ca4d20629dfb7a3ee5ef367c799003f915e0984c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.104
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling ucd-trie v0.1.7
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling zmij v1.0.2
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling serde_json v1.0.148
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking unicode-ident v1.0.22
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling num-modular v0.6.1
[INFO] [stderr]    Compiling itoa v1.0.17
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking sdd v3.0.10
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]     Checking scc v2.4.0
[INFO] [stderr]    Compiling pest v2.8.4
[INFO] [stderr]    Compiling num-order v1.2.0
[INFO] [stderr]     Checking syn v2.0.111
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]    Compiling pest_meta v2.8.4
[INFO] [stderr]     Checking rs-schema v1.0.0
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling pest_generator v2.8.4
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling rs-schema-derive-impl v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling serial_test_derive v3.2.0
[INFO] [stderr]    Compiling pest_derive v2.8.4
[INFO] [stderr]    Compiling rs-schema-derive v0.1.0
[INFO] [stderr]    Compiling tokio v1.48.0
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling darling v0.20.11
[INFO] [stderr]    Compiling derive_builder_core v0.20.2
[INFO] [stderr]    Compiling derive_builder_macro v0.20.2
[INFO] [stderr]    Compiling derive_builder v0.20.2
[INFO] [stderr]    Compiling handlebars v6.3.2
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking n-observer v0.1.2
[INFO] [stderr]     Checking async-cffi v0.1.1
[INFO] [stderr]     Checking serial_test v3.2.0
[INFO] [stderr]    Compiling async-cffi-codegen v0.1.0
[INFO] [stderr]    Compiling n-observer-cffi-impl v0.1.0
[INFO] [stderr] warning: n-observer-cffi-impl@0.1.0: Using default edition 2024 for rustfmt (CARGO_PKG_EDITION missing: environment variable not found)
[INFO] [stderr] warning: n-observer-cffi-impl@0.1.0: Failed to format generated code: rustfmt exited with status exit status: 1: 
[INFO] [stderr] error: failed to run custom build command for `n-observer-cffi-impl v0.1.0`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/n-observer-cffi-impl-f664f65702d241c5/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:warning=Using default edition 2024 for rustfmt (CARGO_PKG_EDITION missing: environment variable not found)
[INFO] [stderr]   cargo:warning=Failed to format generated code: rustfmt exited with status exit status: 1: 
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   error: 'rustfmt' is not installed for the custom toolchain 'bbe853615821442ef11d6cd42a30a73432b38d89'.
[INFO] [stderr]   note: this is a custom toolchain, which cannot use `rustup component add`
[INFO] [stderr]   help: if you built this toolchain from source, and used `rustup toolchain link`, then you may be able to build the component with `x.py`
[INFO] [stderr]   Error: Custom { kind: Other, error: "failed to create file /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/n-observer-cffi-impl-0.1.0/src/ior_cffi_traits.rs: Read-only file system (os error 30)" }
[INFO] running `Command { std: "docker" "inspect" "9b107ade7c3a93a4afb2ae5ca4d20629dfb7a3ee5ef367c799003f915e0984c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b107ade7c3a93a4afb2ae5ca4d20629dfb7a3ee5ef367c799003f915e0984c6", kill_on_drop: false }`
[INFO] [stdout] 9b107ade7c3a93a4afb2ae5ca4d20629dfb7a3ee5ef367c799003f915e0984c6