[INFO] fetching crate flashbang 0.1.0-prealpha...
[INFO] checking flashbang-0.1.0-prealpha against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate flashbang 0.1.0-prealpha into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate flashbang 0.1.0-prealpha
[INFO] finished tweaking crates.io crate flashbang 0.1.0-prealpha
[INFO] tweaked toml for crates.io crate flashbang 0.1.0-prealpha written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flashbang 0.1.0-prealpha on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flashbang 0.1.0-prealpha 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11ac4a8d2e8e770280e76c75ae371c621f1eb0d27dbcdcba2c4daa7348a92071
[INFO] running `Command { std: "docker" "start" "-a" "11ac4a8d2e8e770280e76c75ae371c621f1eb0d27dbcdcba2c4daa7348a92071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11ac4a8d2e8e770280e76c75ae371c621f1eb0d27dbcdcba2c4daa7348a92071", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11ac4a8d2e8e770280e76c75ae371c621f1eb0d27dbcdcba2c4daa7348a92071", kill_on_drop: false }`
[INFO] [stdout] 11ac4a8d2e8e770280e76c75ae371c621f1eb0d27dbcdcba2c4daa7348a92071
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c38704b9f6fed20b133b7cf45f9d8d538ab9eeb99dd93e3332e4fc7c63973f0d
[INFO] running `Command { std: "docker" "start" "-a" "c38704b9f6fed20b133b7cf45f9d8d538ab9eeb99dd93e3332e4fc7c63973f0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[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 typenum v1.16.0
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-channel v0.3.26
[INFO] [stderr]    Compiling futures-task v0.3.26
[INFO] [stderr]    Compiling tokio v1.24.2
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking futures-sink v0.3.26
[INFO] [stderr]    Compiling futures-util v0.3.26
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling async-trait v0.1.63
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]     Checking futures-io v0.3.26
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]    Compiling webrtc-util v0.7.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking unicode-bidi v0.3.10
[INFO] [stderr]     Checking cpufeatures v0.2.5
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]     Checking ipnet v2.7.1
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking crc-catalog v2.2.0
[INFO] [stderr]     Checking base64 v0.13.1
[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]     Checking crc v3.0.1
[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" "c38704b9f6fed20b133b7cf45f9d8d538ab9eeb99dd93e3332e4fc7c63973f0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c38704b9f6fed20b133b7cf45f9d8d538ab9eeb99dd93e3332e4fc7c63973f0d", kill_on_drop: false }`
[INFO] [stdout] c38704b9f6fed20b133b7cf45f9d8d538ab9eeb99dd93e3332e4fc7c63973f0d