[INFO] fetching crate tracing-tree2 0.3.0...
[INFO] building tracing-tree2-0.3.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate tracing-tree2 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate tracing-tree2 0.3.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tracing-tree2 0.3.0
[INFO] tweaked toml for crates.io crate tracing-tree2 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tracing-tree2 0.3.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tracing-tree2 0.3.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates-core v1.0.5
[INFO] [stderr]   Downloaded predicates-tree v1.0.7
[INFO] [stderr]   Downloaded assert_cmd v1.0.8
[INFO] [stderr]   Downloaded termtree v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf1fd2321c214a404114b15e2fd19e3b1eb3e761d8caa4b49320e64f0d9e0178
[INFO] running `Command { std: "docker" "start" "-a" "cf1fd2321c214a404114b15e2fd19e3b1eb3e761d8caa4b49320e64f0d9e0178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf1fd2321c214a404114b15e2fd19e3b1eb3e761d8caa4b49320e64f0d9e0178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf1fd2321c214a404114b15e2fd19e3b1eb3e761d8caa4b49320e64f0d9e0178", kill_on_drop: false }`
[INFO] [stdout] cf1fd2321c214a404114b15e2fd19e3b1eb3e761d8caa4b49320e64f0d9e0178
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] deed6dc907b34be7871bdaa2ab3d255201330e6831499e58084120dc49ac1120
[INFO] running `Command { std: "docker" "start" "-a" "deed6dc907b34be7871bdaa2ab3d255201330e6831499e58084120dc49ac1120", kill_on_drop: false }`
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling sharded-slab v0.1.4
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling tracing-log v0.1.3
[INFO] [stderr]    Compiling tracing-subscriber v0.3.16
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling tracing-tree2 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `Command { std: "docker" "inspect" "deed6dc907b34be7871bdaa2ab3d255201330e6831499e58084120dc49ac1120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "deed6dc907b34be7871bdaa2ab3d255201330e6831499e58084120dc49ac1120", kill_on_drop: false }`
[INFO] [stdout] deed6dc907b34be7871bdaa2ab3d255201330e6831499e58084120dc49ac1120
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb910c0c4d2511426c70722aa357830112b4ac6633f6333c805b8b55d70320e4
[INFO] running `Command { std: "docker" "start" "-a" "bb910c0c4d2511426c70722aa357830112b4ac6633f6333c805b8b55d70320e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[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 memchr v2.5.0
[INFO] [stderr]    Compiling predicates-core v1.0.5
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling termtree v0.4.0
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling predicates-tree v1.0.7
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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" "bb910c0c4d2511426c70722aa357830112b4ac6633f6333c805b8b55d70320e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb910c0c4d2511426c70722aa357830112b4ac6633f6333c805b8b55d70320e4", kill_on_drop: false }`
[INFO] [stdout] bb910c0c4d2511426c70722aa357830112b4ac6633f6333c805b8b55d70320e4