[INFO] fetching crate tps_minicbor 0.5.1...
[INFO] building tps_minicbor-0.5.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate tps_minicbor 0.5.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate tps_minicbor 0.5.1
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate tps_minicbor 0.5.1
[INFO] tweaked toml for crates.io crate tps_minicbor 0.5.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tps_minicbor 0.5.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tps_minicbor 0.5.1 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbe7254152a7ceef1456668d9229dee0784e2c70d537d653ddf8f934c3ca5b73
[INFO] running `Command { std: "docker" "start" "-a" "bbe7254152a7ceef1456668d9229dee0784e2c70d537d653ddf8f934c3ca5b73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbe7254152a7ceef1456668d9229dee0784e2c70d537d653ddf8f934c3ca5b73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbe7254152a7ceef1456668d9229dee0784e2c70d537d653ddf8f934c3ca5b73", kill_on_drop: false }`
[INFO] [stdout] bbe7254152a7ceef1456668d9229dee0784e2c70d537d653ddf8f934c3ca5b73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4254b74f89a1236f37bec4817cb24545c717e06a40382c8ee3d2c8b6cb94849d
[INFO] running `Command { std: "docker" "start" "-a" "4254b74f89a1236f37bec4817cb24545c717e06a40382c8ee3d2c8b6cb94849d", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling zeroize v1.6.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.54
[INFO] [stderr]    Compiling const-oid v0.9.2
[INFO] [stderr]    Compiling base64ct v1.6.0
[INFO] [stderr]    Compiling base16ct v0.1.1
[INFO] [stderr]    Compiling cpufeatures v0.2.6
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling half v2.2.1
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling der v0.6.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ff v0.12.1
[INFO] [stderr]    Compiling group v0.12.1
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.54/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] [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" "4254b74f89a1236f37bec4817cb24545c717e06a40382c8ee3d2c8b6cb94849d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4254b74f89a1236f37bec4817cb24545c717e06a40382c8ee3d2c8b6cb94849d", kill_on_drop: false }`
[INFO] [stdout] 4254b74f89a1236f37bec4817cb24545c717e06a40382c8ee3d2c8b6cb94849d