[INFO] fetching crate melblkidx 0.7.4...
[INFO] checking melblkidx-0.7.4 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate melblkidx 0.7.4 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate melblkidx 0.7.4 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate melblkidx 0.7.4
[INFO] finished tweaking crates.io crate melblkidx 0.7.4
[INFO] tweaked toml for crates.io crate melblkidx 0.7.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate melblkidx 0.7.4 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tmelcrypt v0.2.7
[INFO] [stderr]   Downloaded ed25519-consensus v1.2.1
[INFO] [stderr]   Downloaded derive_arbitrary v1.2.3
[INFO] [stderr]   Downloaded constant_time_eq v0.2.4
[INFO] [stderr]   Downloaded stdcode v0.1.14
[INFO] [stderr]   Downloaded arbitrary v1.2.3
[INFO] [stderr]   Downloaded blake3 v1.3.3
[INFO] [stderr]   Downloaded quanta v0.10.1
[INFO] [stderr]   Downloaded scheduled-thread-pool v0.2.6
[INFO] [stderr]   Downloaded camino v1.1.3
[INFO] [stderr]   Downloaded triomphe v0.1.8
[INFO] [stderr]   Downloaded async-recursion v1.0.2
[INFO] [stderr]   Downloaded lz4_flex v0.9.5
[INFO] [stderr]   Downloaded raw-cpuid v10.6.1
[INFO] [stderr]   Downloaded moka v0.9.7
[INFO] [stderr]   Downloaded hyper v1.0.0-rc.3
[INFO] [stderr]   Downloaded async-compat v0.2.1
[INFO] [stderr]   Downloaded http-body-util v0.1.0-rc.2
[INFO] [stderr]   Downloaded nanorpc-derive v0.1.5
[INFO] [stderr]   Downloaded melprot v0.13.0
[INFO] [stderr]   Downloaded http-body v1.0.0-rc.2
[INFO] [stderr]   Downloaded nanorpc-http v0.1.1
[INFO] [stderr]   Downloaded reusable-box-future v0.2.0
[INFO] [stderr]   Downloaded smol-timeout v0.6.0
[INFO] [stderr]   Downloaded melnet2 v0.3.1
[INFO] [stderr]   Downloaded nanorpc v0.1.12
[INFO] [stderr]   Downloaded ethnum v1.3.2
[INFO] [stderr]   Downloaded genawaiter-macro v0.99.1
[INFO] [stderr]   Downloaded genawaiter-proc-macro v0.99.1
[INFO] [stderr]   Downloaded genawaiter v0.99.1
[INFO] [stderr]   Downloaded novasmt v0.2.20
[INFO] [stderr]   Downloaded toml_edit v0.18.1
[INFO] [stderr]   Downloaded proc-macro-crate v1.3.0
[INFO] [stderr]   Downloaded structmeta-derive v0.1.5
[INFO] [stderr]   Downloaded structmeta v0.1.5
[INFO] [stderr]   Downloaded parse-display-derive v0.5.5
[INFO] [stderr]   Downloaded parse-display v0.5.5
[INFO] [stderr]   Downloaded honggfuzz v0.5.55
[INFO] [stderr]   Downloaded melstructs v0.3.2
[INFO] [stderr]   Downloaded melbootstrap v0.8.0
[INFO] [stderr]   Downloaded melnet2 v0.1.9
[INFO] [stderr]   Downloaded st3 v0.4.1
[INFO] [stderr]   Downloaded tabwriter v1.2.1
[INFO] [stderr]   Downloaded smolscale v0.3.52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 803e2b0ca45715cce6c3956f72d5862075e7fe36f585baedd6ba053e9f4adf9f
[INFO] running `Command { std: "docker" "start" "-a" "803e2b0ca45715cce6c3956f72d5862075e7fe36f585baedd6ba053e9f4adf9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "803e2b0ca45715cce6c3956f72d5862075e7fe36f585baedd6ba053e9f4adf9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "803e2b0ca45715cce6c3956f72d5862075e7fe36f585baedd6ba053e9f4adf9f", kill_on_drop: false }`
[INFO] [stdout] 803e2b0ca45715cce6c3956f72d5862075e7fe36f585baedd6ba053e9f4adf9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f26e03967ad8edd585e9046c90fe62db55327136f3d835ed28bf74458b634124
[INFO] running `Command { std: "docker" "start" "-a" "f26e03967ad8edd585e9046c90fe62db55327136f3d835ed28bf74458b634124", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.51/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-io v0.3.26
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f26e03967ad8edd585e9046c90fe62db55327136f3d835ed28bf74458b634124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f26e03967ad8edd585e9046c90fe62db55327136f3d835ed28bf74458b634124", kill_on_drop: false }`
[INFO] [stdout] f26e03967ad8edd585e9046c90fe62db55327136f3d835ed28bf74458b634124
