[INFO] cloning repository https://github.com/REX-codebase/rex-mcp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/REX-codebase/rex-mcp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FREX-codebase%2Frex-mcp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FREX-codebase%2Frex-mcp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a5ecfc915410f01ebf61570d6ee4cc382882aa5
[INFO] checking REX-codebase/rex-mcp against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FREX-codebase%2Frex-mcp" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/REX-codebase/rex-mcp
[INFO] finished tweaking git repo https://github.com/REX-codebase/rex-mcp
[INFO] tweaked toml for git repo https://github.com/REX-codebase/rex-mcp written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/REX-codebase/rex-mcp on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/REX-codebase/rex-mcp 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0
[INFO] running `Command { std: "docker" "start" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.26
[INFO] [stderr]     Checking cfg-if v1.0.5
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]    Compiling serde v1.0.229
[INFO] [stderr]     Checking itoa v1.0.18
[INFO] [stderr]    Compiling zmij v1.0.23
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]     Checking memchr v2.8.3
[INFO] [stderr]     Checking writeable v0.6.4
[INFO] [stderr]    Compiling siphasher v1.0.3
[INFO] [stderr]    Compiling libc v0.2.189
[INFO] [stderr]    Compiling shlex v2.0.1
[INFO] [stderr]    Compiling zerocopy v0.8.58
[INFO] [stderr]    Compiling find-msvc-tools v0.1.13
[INFO] [stderr]     Checking litemap v0.8.3
[INFO] [stderr]     Checking allocator-api2 v0.2.21
[INFO] [stderr]    Compiling rustversion v1.0.23
[INFO] [stderr]    Compiling smallvec v1.16.2
[INFO] [stderr]     Checking bitflags v2.13.2
[INFO] [stderr]    Compiling cc v1.4.7
[INFO] [stderr]    Compiling serde_json v1.0.151
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling phf_shared v0.14.0
[INFO] [stderr]     Checking percent-encoding v2.3.2
[INFO] [stderr]     Checking rustc-hash v2.1.3
[INFO] [stderr]     Checking subtle v2.6.1
[INFO] [stderr]     Checking typenum v1.20.1
[INFO] [stderr]    Compiling icu_locale_fallback_data v2.3.0
[INFO] [stderr]    Compiling interpolator v0.5.0
[INFO] [stderr]    Compiling collection_literals v1.0.3
[INFO] [stderr]    Compiling icu_segmenter_data v2.3.0
[INFO] [stderr]     Checking oxc_data_structures v0.151.0
[INFO] [stderr]     Checking oxc_estree v0.151.0
[INFO] [stderr]    Compiling fastrand v2.5.0
[INFO] [stderr]    Compiling object v0.39.1
[INFO] [stderr]    Compiling thiserror v2.0.21
[INFO] [stderr]    Compiling phf_shared v0.11.3
[INFO] [stderr]    Compiling autocfg v1.5.1
[INFO] [stderr]    Compiling phf v0.14.0
[INFO] [stderr]    Compiling phf_generator v0.14.0
[INFO] [stderr]     Checking hashbrown v0.17.1
[INFO] [stderr]     Checking thin-vec v0.2.20
[INFO] [stderr]     Checking unicode-width v0.2.2
[INFO] [stderr]     Checking cow-utils v0.1.3
[INFO] [stderr]    Compiling dragonbox_ecma v0.1.12
[INFO] [stderr]    Compiling syn v3.0.6
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]     Checking castaway v0.2.4
[INFO] [stderr]    Compiling proc-macro-utils v0.10.0
[INFO] [stderr]     Checking smawk v0.3.3
[INFO] [stderr]     Checking compact_str v0.10.0
[INFO] [stderr]     Checking aho-corasick v1.1.5
[INFO] [stderr]     Checking unicode-id-start v1.5.0
[INFO] [stderr]     Checking nonmax v0.5.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling getopts v0.2.24
[INFO] [stderr]     Checking bytecount v0.6.9
[INFO] [stderr]     Checking unicode-segmentation v1.13.3
[INFO] [stderr]    Compiling log v0.4.34
[INFO] [stderr]    Compiling icu_normalizer_data v2.3.0
[INFO] [stderr]     Checking oxc_allocator v0.151.0
[INFO] [stderr]     Checking indexmap v2.14.2
[INFO] [stderr]     Checking once_cell v1.21.4
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]     Checking either v1.18.0
[INFO] [stderr]     Checking simd-adler32 v0.3.10
[INFO] [stderr]     Checking oxc_str v0.151.0
[INFO] [stderr]    Compiling icu_properties_data v2.3.0
[INFO] [stderr]    Compiling manyhow-macros v0.11.4
[INFO] [stderr]     Checking regex-syntax v0.8.11
[INFO] [stderr]     Checking itertools v0.15.0
[INFO] [stderr]     Checking zeroize v1.9.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking ryu v1.0.23
[INFO] [stderr]    Compiling crc32fast v1.5.2
[INFO] [stderr]     Checking rustls-pki-types v1.15.1
[INFO] [stderr]     Checking ordermap v1.2.2
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling stacker v0.1.25
[INFO] [stderr]     Checking phf v0.11.3
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]     Checking num-integer v0.1.47
[INFO] [stderr]     Checking bytes v1.12.1
[INFO] [stderr]     Checking tinyvec v1.13.3
[INFO] [stderr]     Checking winnow v1.0.4
[INFO] [stderr]     Checking arrayvec v0.7.8
[INFO] [stderr]     Checking unicode-normalization v0.1.25
[INFO] [stderr]     Checking toml_parser v1.1.3+spec-1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.9.1
[INFO] [stderr]     Checking toml_writer v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking num-bigint v0.5.1
[INFO] [stderr]     Checking winnow v0.7.15
[INFO] [stderr]    Compiling rustls v0.23.45
[INFO] [stderr]     Checking drop_bomb v0.1.5
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]     Checking serde_spanned v1.1.1
[INFO] [stderr]     Checking toml_datetime v0.7.5+spec-1.1.0
[INFO] [stderr]     Checking arraydeque v0.5.1
[INFO] [stderr]     Checking http v1.5.0
[INFO] [stderr]     Checking flate2 v1.1.10
[INFO] [stderr]     Checking crypto-common v0.1.7
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking base64 v0.23.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking rand_core v0.9.5
[INFO] [stderr]     Checking sha2 v0.10.9
[INFO] [stderr]     Checking webpki-roots v1.0.9
[INFO] [stderr]     Checking form_urlencoded v1.2.2
[INFO] [stderr]     Checking utf8-zero v0.8.1
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha1 v0.10.7
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]     Checking fdeflate v0.3.7
[INFO] [stderr]     Checking data-encoding v2.11.1
[INFO] [stderr]     Checking ureq-proto v0.6.4
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling rustix v1.1.5
[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/895980e0290783bb09b1ccf1b11f14eb09b10430/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.119/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -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"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=b162a1d53b5b2b58 -C extra-filename=-ed4eeb806bdb6f99 --out-dir /opt/rustwide/target/debug/build/syn/ed4eeb806bdb6f99/out -L dependency=/opt/rustwide/target/debug/build/proc-macro2/c062a139c850ccf4/out -L dependency=/opt/rustwide/target/debug/build/unicode-ident/06275983cc9514f8/out --extern proc_macro2=/opt/rustwide/target/debug/build/proc-macro2/c062a139c850ccf4/out/libproc_macro2-c062a139c850ccf4.rmeta --extern quote=/opt/rustwide/target/debug/build/quote/63a63655125647b2/out/libquote-63a63655125647b2.rmeta --extern unicode_ident=/opt/rustwide/target/debug/build/unicode-ident/06275983cc9514f8/out/libunicode_ident-06275983cc9514f8.rmeta --cap-lints allow --cap-lints=forbid --force-warn=unused_crate_dependencies` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `object` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/895980e0290783bb09b1ccf1b11f14eb09b10430/bin/rustc --crate-name object --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/object-0.39.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -C embed-bitcode=no --cfg 'feature="archive"' --cfg 'feature="coff"' --cfg 'feature="elf"' --cfg 'feature="macho"' --cfg 'feature="pe"' --cfg 'feature="read"' --cfg 'feature="read_core"' --cfg 'feature="std"' --cfg 'feature="xcoff"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("all", "alloc", "archive", "build", "build_core", "cargo-all", "coff", "compression", "core", "default", "doc", "elf", "macho", "pe", "read", "read_core", "rustc-dep-of-std", "std", "unaligned", "unstable", "unstable-all", "wasm", "write", "write_core", "write_std", "xcoff"))' -C metadata=5f161084877249bd -C extra-filename=-7392235e6d6d7c0a --out-dir /opt/rustwide/target/debug/build/object/7392235e6d6d7c0a/out --extern memchr=/opt/rustwide/target/debug/build/memchr/99d2f2078a65bceb/out/libmemchr-99d2f2078a65bceb.rmeta --cap-lints allow --cap-lints=forbid --force-warn=unused_crate_dependencies --cfg core_error --check-cfg 'cfg(core_error)'` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0", kill_on_drop: false }`
[INFO] [stdout] 9bba6ad54d9ed3e1040bd5922e8139b5ad5c401114cb8b9a22c576c277cab6e0
