[INFO] fetching crate tofuri-db 0.1.0...
[INFO] building tofuri-db-0.1.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate tofuri-db 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate tofuri-db 0.1.0
[INFO] finished tweaking crates.io crate tofuri-db 0.1.0
[INFO] tweaked toml for crates.io crate tofuri-db 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tofuri-db 0.1.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tofuri-db 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tofuri-key v0.1.0
[INFO] [stderr]   Downloaded vrf v0.2.4
[INFO] [stderr]   Downloaded block-buffer v0.10.3
[INFO] [stderr]   Downloaded once_cell v1.17.0
[INFO] [stderr]   Downloaded hmac-sha256 v1.1.6
[INFO] [stderr]   Downloaded tofuri-int v0.1.0
[INFO] [stderr]   Downloaded tofuri-block v0.1.0
[INFO] [stderr]   Downloaded sha2 v0.10.6
[INFO] [stderr]   Downloaded serde-big-array v0.4.1
[INFO] [stderr]   Downloaded cpufeatures v0.2.5
[INFO] [stderr]   Downloaded openssl-sys v0.9.80
[INFO] [stderr]   Downloaded merkle-cbt v0.3.2
[INFO] [stderr]   Downloaded clang-sys v1.4.0
[INFO] [stderr]   Downloaded rocksdb v0.19.0
[INFO] [stderr]   Downloaded serde_derive v1.0.152
[INFO] [stderr]   Downloaded openssl v0.10.45
[INFO] [stderr]   Downloaded generic-array v0.14.6
[INFO] [stderr]   Downloaded digest v0.10.6
[INFO] [stderr]   Downloaded secp256k1 v0.25.0
[INFO] [stderr]   Downloaded bindgen v0.60.1
[INFO] [stderr]   Downloaded tofuri-transaction v0.1.0
[INFO] [stderr]   Downloaded serde v1.0.152
[INFO] [stderr]   Downloaded zstd-sys v2.0.6+zstd.1.5.2
[INFO] [stderr]   Downloaded gimli v0.27.1
[INFO] [stderr]   Downloaded libz-sys v1.1.8
[INFO] [stderr]   Downloaded secp256k1-sys v0.7.0
[INFO] [stderr]   Downloaded tofuri-core v0.1.0
[INFO] [stderr]   Downloaded librocksdb-sys v0.8.0+7.4.4
[INFO] [stderr]   Downloaded tofuri-stake v0.1.0
[INFO] [stderr]   Downloaded tofuri-tree v0.1.0
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c44fb13313365294bd9d4c8d4e4d86086ec3173ffad80f46b38fa44fb6227ef
[INFO] running `Command { std: "docker" "start" "-a" "0c44fb13313365294bd9d4c8d4e4d86086ec3173ffad80f46b38fa44fb6227ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c44fb13313365294bd9d4c8d4e4d86086ec3173ffad80f46b38fa44fb6227ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c44fb13313365294bd9d4c8d4e4d86086ec3173ffad80f46b38fa44fb6227ef", kill_on_drop: false }`
[INFO] [stdout] 0c44fb13313365294bd9d4c8d4e4d86086ec3173ffad80f46b38fa44fb6227ef
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 135a043ab44a5659b435e67873a4d0745db58bf1e3ef83a053892aa70c56e317
[INFO] running `Command { std: "docker" "start" "-a" "135a043ab44a5659b435e67873a4d0745db58bf1e3ef83a053892aa70c56e317", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling gimli v0.27.1
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling bindgen v0.60.1
[INFO] [stderr]    Compiling tofuri-core v0.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling jobserver v0.1.25
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling hmac-sha256 v1.1.6
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling tofuri-int v0.1.0
[INFO] [stderr]    Compiling merkle-cbt v0.3.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/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]    Compiling tofuri-tree v0.1.0
[INFO] [stderr]    Compiling clang-sys v1.4.0
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling object v0.30.3
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[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 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "135a043ab44a5659b435e67873a4d0745db58bf1e3ef83a053892aa70c56e317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "135a043ab44a5659b435e67873a4d0745db58bf1e3ef83a053892aa70c56e317", kill_on_drop: false }`
[INFO] [stdout] 135a043ab44a5659b435e67873a4d0745db58bf1e3ef83a053892aa70c56e317