[INFO] fetching crate mawby 0.1.0...
[INFO] testing mawby-0.1.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate mawby 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate mawby 0.1.0
[INFO] finished tweaking crates.io crate mawby 0.1.0
[INFO] tweaked toml for crates.io crate mawby 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mawby 0.1.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mawby 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded chrono-tz-build v0.0.3
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.88
[INFO] [stderr]   Downloaded thread-id v4.0.0
[INFO] [stderr]   Downloaded matrix-sdk-store-encryption v0.2.0
[INFO] [stderr]   Downloaded pkcs7 v0.3.0
[INFO] [stderr]   Downloaded ruma v0.7.4
[INFO] [stderr]   Downloaded matrix-sdk-common v0.6.0
[INFO] [stderr]   Downloaded ruma-identifiers-validation v0.9.0
[INFO] [stderr]   Downloaded prost-derive v0.11.6
[INFO] [stderr]   Downloaded indexed_db_futures v0.2.3
[INFO] [stderr]   Downloaded zstd-safe v6.0.2+zstd.1.5.2
[INFO] [stderr]   Downloaded zstd v0.12.2+zstd.1.5.2
[INFO] [stderr]   Downloaded matrix-sdk-base v0.6.1
[INFO] [stderr]   Downloaded ruma-macros v0.10.5
[INFO] [stderr]   Downloaded ruma-client-api v0.15.3
[INFO] [stderr]   Downloaded matrix-sdk v0.6.2
[INFO] [stderr]   Downloaded log4rs v1.2.0
[INFO] [stderr]   Downloaded futures-signals v0.3.31
[INFO] [stderr]   Downloaded prost v0.11.6
[INFO] [stderr]   Downloaded matrix-sdk-crypto v0.6.0
[INFO] [stderr]   Downloaded vodozemac v0.3.0
[INFO] [stderr]   Downloaded ruma-common v0.10.5
[INFO] [stderr]   Downloaded ruma-federation-api v0.6.0
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.88
[INFO] [stderr]   Downloaded http-auth-basic v0.3.3
[INFO] [stderr]   Downloaded async-once-cell v0.3.1
[INFO] [stderr]   Downloaded matrix-sdk-indexeddb v0.2.0
[INFO] [stderr]   Downloaded bstr v1.2.0
[INFO] [stderr]   Downloaded matrix-sdk-sled v0.2.0
[INFO] [stderr]   Downloaded tera v1.17.1
[INFO] [stderr]   Downloaded cxx-build v1.0.88
[INFO] [stderr]   Downloaded wildmatch v2.1.1
[INFO] [stderr]   Downloaded tokio-test v0.4.2
[INFO] [stderr]   Downloaded chrono-tz v0.6.3
[INFO] [stderr]   Downloaded zstd-sys v2.0.5+zstd.1.5.2
[INFO] [stderr]   Downloaded cxx v1.0.88
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b7bfad7e01fa672c4bab8fd79c57e0ec483b45a5d19667348faacdc2351aa3b
[INFO] running `Command { std: "docker" "start" "-a" "4b7bfad7e01fa672c4bab8fd79c57e0ec483b45a5d19667348faacdc2351aa3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b7bfad7e01fa672c4bab8fd79c57e0ec483b45a5d19667348faacdc2351aa3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b7bfad7e01fa672c4bab8fd79c57e0ec483b45a5d19667348faacdc2351aa3b", kill_on_drop: false }`
[INFO] [stdout] 4b7bfad7e01fa672c4bab8fd79c57e0ec483b45a5d19667348faacdc2351aa3b
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f86e0529dae2c2fd15532f606f4e221b252b635c8ca690dbee29492faf0c2ae2
[INFO] running `Command { std: "docker" "start" "-a" "f86e0529dae2c2fd15532f606f4e221b252b635c8ca690dbee29492faf0c2ae2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.9
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling regex v1.7.1
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling tokio v1.24.2
[INFO] [stderr]    Compiling indexmap v1.9.2
[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 cpufeatures v0.2.5
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling uncased v0.9.7
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling crypto-common v0.1.6
[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" "f86e0529dae2c2fd15532f606f4e221b252b635c8ca690dbee29492faf0c2ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f86e0529dae2c2fd15532f606f4e221b252b635c8ca690dbee29492faf0c2ae2", kill_on_drop: false }`
[INFO] [stdout] f86e0529dae2c2fd15532f606f4e221b252b635c8ca690dbee29492faf0c2ae2