[INFO] fetching crate serde-tc 0.4.1...
[INFO] testing serde-tc-0.4.1 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate serde-tc 0.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate serde-tc 0.4.1
[INFO] finished tweaking crates.io crate serde-tc 0.4.1
[INFO] tweaked toml for crates.io crate serde-tc 0.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde-tc 0.4.1 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serde-tc 0.4.1 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ipnet v2.5.1
[INFO] [stderr]   Downloaded serde v1.0.148
[INFO] [stderr]   Downloaded serde-tc-macro v0.4.0
[INFO] [stderr]   Downloaded axum-core v0.2.9
[INFO] [stderr]   Downloaded futures-task v0.3.25
[INFO] [stderr]   Downloaded anyhow v1.0.66
[INFO] [stderr]   Downloaded futures-util v0.3.25
[INFO] [stderr]   Downloaded http-range-header v0.3.0
[INFO] [stderr]   Downloaded tower-http v0.3.5
[INFO] [stderr]   Downloaded h2 v0.3.15
[INFO] [stderr]   Downloaded axum v0.5.17
[INFO] [stderr]   Downloaded sync_wrapper v0.1.1
[INFO] [stderr]   Downloaded async-trait v0.1.59
[INFO] [stderr]   Downloaded futures-channel v0.3.25
[INFO] [stderr]   Downloaded openssl-macros v0.1.0
[INFO] [stderr]   Downloaded openssl-sys v0.9.78
[INFO] [stderr]   Downloaded openssl v0.10.43
[INFO] [stderr]   Downloaded reqwest v0.11.13
[INFO] [stderr]   Downloaded tokio-util v0.7.4
[INFO] [stderr]   Downloaded security-framework v2.7.0
[INFO] [stderr]   Downloaded serde_derive v1.0.148
[INFO] [stderr]   Downloaded tokio v1.22.0
[INFO] [stderr]   Downloaded hyper v0.14.23
[INFO] [stderr]   Downloaded matchit v0.5.0
[INFO] [stderr]   Downloaded num_cpus v1.14.0
[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" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2201f68c32e524feb9cc793733cf04631ae257d06469b04ee4902e6e0d2ba905
[INFO] running `Command { std: "docker" "start" "-a" "2201f68c32e524feb9cc793733cf04631ae257d06469b04ee4902e6e0d2ba905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2201f68c32e524feb9cc793733cf04631ae257d06469b04ee4902e6e0d2ba905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2201f68c32e524feb9cc793733cf04631ae257d06469b04ee4902e6e0d2ba905", kill_on_drop: false }`
[INFO] [stdout] 2201f68c32e524feb9cc793733cf04631ae257d06469b04ee4902e6e0d2ba905
[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" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 175e850f262e8c6be84371e0b42ad57baf6748870f0f6e44ee9d61ae66ab7c8b
[INFO] running `Command { std: "docker" "start" "-a" "175e850f262e8c6be84371e0b42ad57baf6748870f0f6e44ee9d61ae66ab7c8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling lock_api v0.4.9
[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 tokio v1.22.0
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.148
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling cc v1.0.77
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling serde v1.0.148
[INFO] [stderr]    Compiling http v0.2.8
[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" "175e850f262e8c6be84371e0b42ad57baf6748870f0f6e44ee9d61ae66ab7c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "175e850f262e8c6be84371e0b42ad57baf6748870f0f6e44ee9d61ae66ab7c8b", kill_on_drop: false }`
[INFO] [stdout] 175e850f262e8c6be84371e0b42ad57baf6748870f0f6e44ee9d61ae66ab7c8b