[INFO] fetching crate merkle-tree-bulletin-board-backend-mysql 0.3.0...
[INFO] checking merkle-tree-bulletin-board-backend-mysql-0.3.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate merkle-tree-bulletin-board-backend-mysql 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate merkle-tree-bulletin-board-backend-mysql 0.3.0
[INFO] finished tweaking crates.io crate merkle-tree-bulletin-board-backend-mysql 0.3.0
[INFO] tweaked toml for crates.io crate merkle-tree-bulletin-board-backend-mysql 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate merkle-tree-bulletin-board-backend-mysql 0.3.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate merkle-tree-bulletin-board-backend-mysql 0.3.0 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytecheck_derive v0.6.10
[INFO] [stderr]   Downloaded borsh-derive-internal v0.10.2
[INFO] [stderr]   Downloaded borsh-derive v0.10.2
[INFO] [stderr]   Downloaded frunk_proc_macros_impl v0.1.1
[INFO] [stderr]   Downloaded borsh-schema-derive-internal v0.10.2
[INFO] [stderr]   Downloaded bytecheck v0.6.10
[INFO] [stderr]   Downloaded borsh v0.10.2
[INFO] [stderr]   Downloaded frunk_derives v0.4.1
[INFO] [stderr]   Downloaded derive_utils v0.12.0
[INFO] [stderr]   Downloaded bigdecimal v0.3.0
[INFO] [stderr]   Downloaded io-enum v1.0.2
[INFO] [stderr]   Downloaded rkyv v0.7.40
[INFO] [stderr]   Downloaded frunk_core v0.4.1
[INFO] [stderr]   Downloaded mysql v23.0.1
[INFO] [stderr]   Downloaded clang-sys v1.6.0
[INFO] [stderr]   Downloaded frunk v0.4.1
[INFO] [stderr]   Downloaded frunk_proc_macro_helpers v0.1.1
[INFO] [stderr]   Downloaded frunk_proc_macros v0.1.1
[INFO] [stderr]   Downloaded rkyv_derive v0.7.40
[INFO] [stderr]   Downloaded merkle-tree-bulletin-board v0.3.0
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b22d61c4ef40a28f3cec5d0c0e573cb4d383db1e220ea6e72327a5c9abf9f99
[INFO] running `Command { std: "docker" "start" "-a" "7b22d61c4ef40a28f3cec5d0c0e573cb4d383db1e220ea6e72327a5c9abf9f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b22d61c4ef40a28f3cec5d0c0e573cb4d383db1e220ea6e72327a5c9abf9f99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b22d61c4ef40a28f3cec5d0c0e573cb4d383db1e220ea6e72327a5c9abf9f99", kill_on_drop: false }`
[INFO] [stdout] 7b22d61c4ef40a28f3cec5d0c0e573cb4d383db1e220ea6e72327a5c9abf9f99
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31ff6bd18b94906e45ed9596faf704d5fe0a61738b2749dcc3bb7373357d83cf
[INFO] running `Command { std: "docker" "start" "-a" "31ff6bd18b94906e45ed9596faf704d5fe0a61738b2749dcc3bb7373357d83cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling serde_derive v1.0.154
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling clang-sys v1.6.0
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]    Compiling serde v1.0.154
[INFO] [stderr]    Compiling frunk_core v0.4.1
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling bindgen v0.59.2
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling thiserror v1.0.39
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]     Checking lexical-write-integer v0.8.5
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 cpufeatures v0.2.5
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking lexical-write-float v0.8.5
[INFO] [stderr]    Compiling openssl-sys v0.9.80
[INFO] [stderr]    Compiling libz-sys v1.1.8
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]    Compiling cmake v0.1.49
[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" "31ff6bd18b94906e45ed9596faf704d5fe0a61738b2749dcc3bb7373357d83cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31ff6bd18b94906e45ed9596faf704d5fe0a61738b2749dcc3bb7373357d83cf", kill_on_drop: false }`
[INFO] [stdout] 31ff6bd18b94906e45ed9596faf704d5fe0a61738b2749dcc3bb7373357d83cf