[INFO] fetching crate diffding 0.2.5...
[INFO] testing diffding-0.2.5 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate diffding 0.2.5 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate diffding 0.2.5
[INFO] finished tweaking crates.io crate diffding 0.2.5
[INFO] tweaked toml for crates.io crate diffding 0.2.5 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate diffding 0.2.5 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate diffding 0.2.5 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.14.0
[INFO] [stderr]   Downloaded unicode-ident v1.0.5
[INFO] [stderr]   Downloaded enable-ansi-support v0.1.2
[INFO] [stderr]   Downloaded link-cplusplus v1.0.7
[INFO] [stderr]   Downloaded itoa v1.0.4
[INFO] [stderr]   Downloaded pest_derive v2.5.0
[INFO] [stderr]   Downloaded is_ci v1.1.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.47
[INFO] [stderr]   Downloaded exitcode v1.1.2
[INFO] [stderr]   Downloaded cfonts v1.1.0
[INFO] [stderr]   Downloaded supports-color v1.3.1
[INFO] [stderr]   Downloaded ucd-trie v0.1.5
[INFO] [stderr]   Downloaded ryu v1.0.11
[INFO] [stderr]   Downloaded config v0.13.2
[INFO] [stderr]   Downloaded toml v0.5.9
[INFO] [stderr]   Downloaded pest v2.5.0
[INFO] [stderr]   Downloaded nom v7.1.1
[INFO] [stderr]   Downloaded serde_json v1.0.89
[INFO] [stderr]   Downloaded regex v1.7.0
[INFO] [stderr]   Downloaded cxx-build v1.0.82
[INFO] [stderr]   Downloaded syn v1.0.104
[INFO] [stderr]   Downloaded signal-hook-tokio v0.3.1
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.82
[INFO] [stderr]   Downloaded cxx v1.0.82
[INFO] [stderr]   Downloaded cc v1.0.77
[INFO] [stderr]   Downloaded scratch v1.0.2
[INFO] [stderr]   Downloaded tokio v1.23.0
[INFO] [stderr]   Downloaded libc v0.2.137
[INFO] [stderr]   Downloaded once_cell v1.16.0
[INFO] [stderr]   Downloaded timer v0.2.0
[INFO] [stderr]   Downloaded async-trait v0.1.59
[INFO] [stderr]   Downloaded pest_generator v2.5.0
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.82
[INFO] [stderr]   Downloaded rustversion v1.0.9
[INFO] [stderr]   Downloaded terminal_size v0.1.17
[INFO] [stderr]   Downloaded thiserror v1.0.37
[INFO] [stderr]   Downloaded rgb2ansi256 v0.1.1
[INFO] [stderr]   Downloaded serde_derive v1.0.148
[INFO] [stderr]   Downloaded pest_meta v2.5.0
[INFO] [stderr]   Downloaded pathdiff v0.2.1
[INFO] [stderr]   Downloaded cmake v0.1.49
[INFO] [stderr]   Downloaded quote v1.0.21
[INFO] [stderr]   Downloaded serde v1.0.148
[INFO] [stderr]   Downloaded thiserror-impl v1.0.37
[INFO] [stderr]   Downloaded soloud-sys v1.0.2
[INFO] [stderr]   Downloaded soloud v1.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffc8082419ce53d4c2b217d6f3c5067a94c9031b5bfd5fde9cd295b7e600dbe4
[INFO] running `Command { std: "docker" "start" "-a" "ffc8082419ce53d4c2b217d6f3c5067a94c9031b5bfd5fde9cd295b7e600dbe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffc8082419ce53d4c2b217d6f3c5067a94c9031b5bfd5fde9cd295b7e600dbe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffc8082419ce53d4c2b217d6f3c5067a94c9031b5bfd5fde9cd295b7e600dbe4", kill_on_drop: false }`
[INFO] [stdout] ffc8082419ce53d4c2b217d6f3c5067a94c9031b5bfd5fde9cd295b7e600dbe4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28e6572e3f2735de9909a510147a1799711f9347638296a0a16e5bb47d0e243b
[INFO] running `Command { std: "docker" "start" "-a" "28e6572e3f2735de9909a510147a1799711f9347638296a0a16e5bb47d0e243b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.104
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.148
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling serde v1.0.148
[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-1949cf8c6b5b557f/proc-macro2-1.0.47/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 parking_lot_core v0.9.5
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[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" "28e6572e3f2735de9909a510147a1799711f9347638296a0a16e5bb47d0e243b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28e6572e3f2735de9909a510147a1799711f9347638296a0a16e5bb47d0e243b", kill_on_drop: false }`
[INFO] [stdout] 28e6572e3f2735de9909a510147a1799711f9347638296a0a16e5bb47d0e243b