[INFO] fetching crate enum2contract-derive 0.1.7...
[INFO] checking enum2contract-derive-0.1.7 against master#9748d87dc70a9a6725c5dbd76ce29d04752b4f90 for pr-144156
[INFO] extracting crate enum2contract-derive 0.1.7 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate enum2contract-derive 0.1.7
[INFO] finished tweaking crates.io crate enum2contract-derive 0.1.7
[INFO] tweaked toml for crates.io crate enum2contract-derive 0.1.7 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate enum2contract-derive 0.1.7 on toolchain 9748d87dc70a9a6725c5dbd76ce29d04752b4f90
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "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" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fe0fafd1386e95f2c443c26f3b6b0a02135825cc11cb328e7fba82836b9ebc6
[INFO] running `Command { std: "docker" "start" "-a" "7fe0fafd1386e95f2c443c26f3b6b0a02135825cc11cb328e7fba82836b9ebc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fe0fafd1386e95f2c443c26f3b6b0a02135825cc11cb328e7fba82836b9ebc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fe0fafd1386e95f2c443c26f3b6b0a02135825cc11cb328e7fba82836b9ebc6", kill_on_drop: false }`
[INFO] [stdout] 7fe0fafd1386e95f2c443c26f3b6b0a02135825cc11cb328e7fba82836b9ebc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d632dd464426fbd5928a6b4b0a963524357f5dc238cf55cc260b8951c9c44bc5
[INFO] running `Command { std: "docker" "start" "-a" "d632dd464426fbd5928a6b4b0a963524357f5dc238cf55cc260b8951c9c44bc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr] error: failed to run custom build command for `proc-macro2 v1.0.95`
[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/proc-macro2-d49143055ae731b5/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(fuzzing)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(no_is_available)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(no_literal_byte_character)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(no_literal_c_string)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(no_source_text)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(proc_macro_span)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(procmacro2_backtrace)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(procmacro2_nightly_testing)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(procmacro2_semver_exempt)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(randomize_layout)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(span_locations)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(super_unstable)
[INFO] [stderr]   cargo:rustc-check-cfg=cfg(wrap_proc_macro)
[INFO] [stderr]   cargo:rerun-if-changed=build/probe.rs
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Failed to create /opt/rustwide/target/debug/build/proc-macro2-4c7e1b59b48745a7/out/probe: No space left on device (os error 28)
[INFO] running `Command { std: "docker" "inspect" "d632dd464426fbd5928a6b4b0a963524357f5dc238cf55cc260b8951c9c44bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d632dd464426fbd5928a6b4b0a963524357f5dc238cf55cc260b8951c9c44bc5", kill_on_drop: false }`
[INFO] [stdout] d632dd464426fbd5928a6b4b0a963524357f5dc238cf55cc260b8951c9c44bc5