[INFO] fetching crate dotz 1.0.3...
[INFO] testing dotz-1.0.3 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate dotz 1.0.3 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate dotz 1.0.3
[INFO] finished tweaking crates.io crate dotz 1.0.3
[INFO] tweaked toml for crates.io crate dotz 1.0.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dotz 1.0.3 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 dotz 1.0.3 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 quote v1.0.23
[INFO] [stderr]   Downloaded ryu v1.0.12
[INFO] [stderr]   Downloaded assert_cli v0.6.3
[INFO] [stderr]   Downloaded colored v1.9.3
[INFO] [stderr]   Downloaded cc v1.0.78
[INFO] [stderr]   Downloaded itoa v1.0.5
[INFO] [stderr]   Downloaded serde v1.0.152
[INFO] [stderr]   Downloaded syn v1.0.107
[INFO] [stderr]   Downloaded proc-macro2 v1.0.50
[INFO] [stderr]   Downloaded unicode-ident v1.0.6
[INFO] [stderr]   Downloaded addr2line v0.19.0
[INFO] [stderr]   Downloaded miniz_oxide v0.6.2
[INFO] [stderr]   Downloaded object v0.30.2
[INFO] [stderr]   Downloaded serde_json v1.0.91
[INFO] [stderr]   Downloaded libc v0.2.139
[INFO] [stderr]   Downloaded gimli v0.27.0
[INFO] [stderr]   Downloaded backtrace v0.3.67
[INFO] [stderr]   Downloaded environment v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0faae61de1a565524fcebc7ae377e54766fc48ead56a47566aafe29f991b5049
[INFO] running `Command { std: "docker" "start" "-a" "0faae61de1a565524fcebc7ae377e54766fc48ead56a47566aafe29f991b5049", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0faae61de1a565524fcebc7ae377e54766fc48ead56a47566aafe29f991b5049", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0faae61de1a565524fcebc7ae377e54766fc48ead56a47566aafe29f991b5049", kill_on_drop: false }`
[INFO] [stdout] 0faae61de1a565524fcebc7ae377e54766fc48ead56a47566aafe29f991b5049
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b171c2150671ba6a76efae2c606788faa528e3b59b123f4e52e42492eabba0ae
[INFO] running `Command { std: "docker" "start" "-a" "b171c2150671ba6a76efae2c606788faa528e3b59b123f4e52e42492eabba0ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling dotz v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "b171c2150671ba6a76efae2c606788faa528e3b59b123f4e52e42492eabba0ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b171c2150671ba6a76efae2c606788faa528e3b59b123f4e52e42492eabba0ae", kill_on_drop: false }`
[INFO] [stdout] b171c2150671ba6a76efae2c606788faa528e3b59b123f4e52e42492eabba0ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19661759bfe7c93b0777f12b670c9b8cf3e1427ccd5d971e6c7aaa3c8247cd73
[INFO] running `Command { std: "docker" "start" "-a" "19661759bfe7c93b0777f12b670c9b8cf3e1427ccd5d971e6c7aaa3c8247cd73", kill_on_drop: false }`
[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 libc v0.2.139
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling gimli v0.27.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling environment v0.1.1
[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] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling object v0.30.2
[INFO] [stderr]    Compiling backtrace v0.3.67
[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" "19661759bfe7c93b0777f12b670c9b8cf3e1427ccd5d971e6c7aaa3c8247cd73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19661759bfe7c93b0777f12b670c9b8cf3e1427ccd5d971e6c7aaa3c8247cd73", kill_on_drop: false }`
[INFO] [stdout] 19661759bfe7c93b0777f12b670c9b8cf3e1427ccd5d971e6c7aaa3c8247cd73
