[INFO] fetching crate cs-trace 0.14.0...
[INFO] testing cs-trace-0.14.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate cs-trace 0.14.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate cs-trace 0.14.0
[INFO] finished tweaking crates.io crate cs-trace 0.14.0
[INFO] tweaked toml for crates.io crate cs-trace 0.14.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cs-trace 0.14.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cs-trace 0.14.0 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded strip-ansi-escapes v0.1.1
[INFO] [stderr]   Downloaded vte_generate_state_changes v0.1.1
[INFO] [stderr]   Downloaded semver v1.0.14
[INFO] [stderr]   Downloaded futures-core v0.3.24
[INFO] [stderr]   Downloaded cs-utils v0.7.1
[INFO] [stderr]   Downloaded futures-macro v0.3.24
[INFO] [stderr]   Downloaded futures-sink v0.3.24
[INFO] [stderr]   Downloaded futures-io v0.3.24
[INFO] [stderr]   Downloaded futures-task v0.3.24
[INFO] [stderr]   Downloaded futures v0.3.24
[INFO] [stderr]   Downloaded futures-executor v0.3.24
[INFO] [stderr]   Downloaded tracing v0.1.36
[INFO] [stderr]   Downloaded futures-channel v0.3.24
[INFO] [stderr]   Downloaded vte v0.10.1
[INFO] [stderr]   Downloaded tokio-util v0.6.10
[INFO] [stderr]   Downloaded spin v0.9.4
[INFO] [stderr]   Downloaded syn v1.0.101
[INFO] [stderr]   Downloaded futures-util v0.3.24
[INFO] [stderr]   Downloaded serde_json v1.0.85
[INFO] [stderr]   Downloaded rstest v0.12.0
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.15
[INFO] [stderr]   Downloaded itoa v1.0.3
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9223b6805922c0a2916d2ca0072e9ed86aafe10d93b28c7334c3f6b3d80e55d4
[INFO] running `Command { std: "docker" "start" "-a" "9223b6805922c0a2916d2ca0072e9ed86aafe10d93b28c7334c3f6b3d80e55d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9223b6805922c0a2916d2ca0072e9ed86aafe10d93b28c7334c3f6b3d80e55d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9223b6805922c0a2916d2ca0072e9ed86aafe10d93b28c7334c3f6b3d80e55d4", kill_on_drop: false }`
[INFO] [stdout] 9223b6805922c0a2916d2ca0072e9ed86aafe10d93b28c7334c3f6b3d80e55d4
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3c59b232f9ddd631c45ddb153417f9f6fba3abe7d1301c0b39e2ffbcb3ecf87
[INFO] running `Command { std: "docker" "start" "-a" "d3c59b232f9ddd631c45ddb153417f9f6fba3abe7d1301c0b39e2ffbcb3ecf87", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling sharded-slab v0.1.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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" "d3c59b232f9ddd631c45ddb153417f9f6fba3abe7d1301c0b39e2ffbcb3ecf87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3c59b232f9ddd631c45ddb153417f9f6fba3abe7d1301c0b39e2ffbcb3ecf87", kill_on_drop: false }`
[INFO] [stdout] d3c59b232f9ddd631c45ddb153417f9f6fba3abe7d1301c0b39e2ffbcb3ecf87
