[INFO] fetching crate mcvm 0.25.0...
[INFO] building mcvm-0.25.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate mcvm 0.25.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mcvm 0.25.0
[INFO] finished tweaking crates.io crate mcvm 0.25.0
[INFO] tweaked toml for crates.io crate mcvm 0.25.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mcvm 0.25.0 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] crate crates.io crate mcvm 0.25.0 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" "+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-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] 4ba84d671898d0d5abfe235bc9b2c57f02036322bcbd1f921d663a9c82d2acc2
[INFO] running `Command { std: "docker" "start" "-a" "4ba84d671898d0d5abfe235bc9b2c57f02036322bcbd1f921d663a9c82d2acc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ba84d671898d0d5abfe235bc9b2c57f02036322bcbd1f921d663a9c82d2acc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ba84d671898d0d5abfe235bc9b2c57f02036322bcbd1f921d663a9c82d2acc2", kill_on_drop: false }`
[INFO] [stdout] 4ba84d671898d0d5abfe235bc9b2c57f02036322bcbd1f921d663a9c82d2acc2
[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] feff691b81ef7bcc4f00af0300b6a4be24223c39d77413969c8ae221ab84f205
[INFO] running `Command { std: "docker" "start" "-a" "feff691b81ef7bcc4f00af0300b6a4be24223c39d77413969c8ae221ab84f205", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.13
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling synstructure v0.13.1
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling tokio v1.44.2
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling lexical-util v1.0.6
[INFO] [stderr]    Compiling rustls v0.23.26
[INFO] [stderr]    Compiling convert_case v0.6.0
[INFO] [stderr]    Compiling rustls-webpki v0.103.1
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling der v0.7.10
[INFO] [stderr]    Compiling ref-cast v1.0.24
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling cfg-match v0.2.1
[INFO] [stderr]    Compiling sys-locale v0.3.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling webpki-roots v0.26.9
[INFO] [stderr]    Compiling ref-cast-impl v1.0.24
[INFO] [stderr]    Compiling urlencoding v2.1.3
[INFO] [stderr]    Compiling num-bigint-dig v0.8.4
[INFO] [stderr]    Compiling kinded_macros v0.3.0
[INFO] [stderr]    Compiling rustls-pemfile v2.2.0
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling rustix v1.0.5
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr] error: could not compile `serde` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/4987e9d4227139400384ab59296ffee3b0fb1183/bin/rustc --crate-name serde --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde-1.0.219/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 -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="rc"' --cfg 'feature="serde_derive"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "default", "derive", "rc", "serde_derive", "std", "unstable"))' -C metadata=e130678abb42bd97 -C extra-filename=-71048969539cc2bd --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-06aae373a1c959bc.so --cap-lints allow --cap-lints=forbid --check-cfg 'cfg(no_core_cstr)' --check-cfg 'cfg(no_core_error)' --check-cfg 'cfg(no_core_net)' --check-cfg 'cfg(no_core_num_saturating)' --check-cfg 'cfg(no_core_try_from)' --check-cfg 'cfg(no_diagnostic_namespace)' --check-cfg 'cfg(no_float_copysign)' --check-cfg 'cfg(no_num_nonzero_signed)' --check-cfg 'cfg(no_relaxed_trait_bounds)' --check-cfg 'cfg(no_serde_derive)' --check-cfg 'cfg(no_std_atomic)' --check-cfg 'cfg(no_std_atomic64)' --check-cfg 'cfg(no_systemtime_checked_add)' --check-cfg 'cfg(no_target_has_atomic)'` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "feff691b81ef7bcc4f00af0300b6a4be24223c39d77413969c8ae221ab84f205", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feff691b81ef7bcc4f00af0300b6a4be24223c39d77413969c8ae221ab84f205", kill_on_drop: false }`
[INFO] [stdout] feff691b81ef7bcc4f00af0300b6a4be24223c39d77413969c8ae221ab84f205