[INFO] fetching crate proc_macro2_diagnostic 0.3.1...
[INFO] checking proc_macro2_diagnostic-0.3.1 against 1.95.0 for pr-155915
[INFO] extracting crate proc_macro2_diagnostic 0.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate proc_macro2_diagnostic 0.3.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate proc_macro2_diagnostic 0.3.1
[INFO] tweaked toml for crates.io crate proc_macro2_diagnostic 0.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate proc_macro2_diagnostic 0.3.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate proc_macro2_diagnostic 0.3.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 256e170500921e6153e468b002f9b7738f8b81720c424b1df7e4af6219995aa1
[INFO] running `Command { std: "docker" "start" "-a" "256e170500921e6153e468b002f9b7738f8b81720c424b1df7e4af6219995aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "256e170500921e6153e468b002f9b7738f8b81720c424b1df7e4af6219995aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "256e170500921e6153e468b002f9b7738f8b81720c424b1df7e4af6219995aa1", kill_on_drop: false }`
[INFO] [stdout] 256e170500921e6153e468b002f9b7738f8b81720c424b1df7e4af6219995aa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d068c11dedd86f56563544b13e9792ab4a450ba67af4d2699e7cf507c54be82e
[INFO] running `Command { std: "docker" "start" "-a" "d068c11dedd86f56563544b13e9792ab4a450ba67af4d2699e7cf507c54be82e", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-triple v1.0.0
[INFO] [stderr]     Checking winnow v1.0.1
[INFO] [stderr]     Checking toml_writer v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling proc_macro2_diagnostic v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking toml_datetime v1.1.1+spec-1.1.0
[INFO] [stderr]     Checking serde_spanned v1.1.1
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking toml v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking syn v2.0.117
[INFO] [stderr]     Checking trybuild v1.0.116
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc_macro2_diagnostic` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d068c11dedd86f56563544b13e9792ab4a450ba67af4d2699e7cf507c54be82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d068c11dedd86f56563544b13e9792ab4a450ba67af4d2699e7cf507c54be82e", kill_on_drop: false }`
[INFO] [stdout] d068c11dedd86f56563544b13e9792ab4a450ba67af4d2699e7cf507c54be82e
