[INFO] fetching crate crdt-richtext 0.1.1...
[INFO] checking crdt-richtext-0.1.1 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate crdt-richtext 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate crdt-richtext 0.1.1 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crdt-richtext 0.1.1
[INFO] finished tweaking crates.io crate crdt-richtext 0.1.1
[INFO] tweaked toml for crates.io crate crdt-richtext 0.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate crdt-richtext 0.1.1 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" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.162
[INFO] [stderr]   Downloaded serde_columnar v0.2.5
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.11
[INFO] [stderr]   Downloaded serde_columnar_derive v0.2.2
[INFO] [stderr]   Downloaded spin v0.9.5
[INFO] [stderr]   Downloaded heapless v0.7.16
[INFO] [stderr]   Downloaded serde_derive v1.0.162
[INFO] [stderr]   Downloaded debug-log v0.1.4
[INFO] [stderr]   Downloaded mintex v0.1.2
[INFO] [stderr]   Downloaded postcard v1.0.4
[INFO] [stderr]   Downloaded inferno v0.11.15
[INFO] [stderr]   Downloaded derive_arbitrary v1.2.3
[INFO] [stderr]   Downloaded sys-info v0.9.1
[INFO] [stderr]   Downloaded thunderdome v0.6.0
[INFO] [stderr]   Downloaded append-only-bytes v0.1.5
[INFO] [stderr]   Downloaded symbolic-common v10.2.1
[INFO] [stderr]   Downloaded cpp_demangle v0.4.0
[INFO] [stderr]   Downloaded arbtest v0.2.0
[INFO] [stderr]   Downloaded color-backtrace v0.5.1
[INFO] [stderr]   Downloaded arbitrary v1.2.3
[INFO] [stderr]   Downloaded generic-btree v0.3.0
[INFO] [stderr]   Downloaded is-terminal v0.4.4
[INFO] [stderr]   Downloaded critical-section v1.1.1
[INFO] [stderr]   Downloaded dhat v0.3.2
[INFO] [stderr]   Downloaded arref v0.1.0
[INFO] [stderr]   Downloaded symbolic-demangle v10.2.1
[INFO] [stderr]   Downloaded crdt-list v0.4.1
[INFO] [stderr]   Downloaded pprof v0.11.1
[INFO] [stderr]   Downloaded cobs v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd6efeeae1d9f630fac784c02306562cd1600bf3f74f8e66c92017da04414560
[INFO] running `Command { std: "docker" "start" "-a" "cd6efeeae1d9f630fac784c02306562cd1600bf3f74f8e66c92017da04414560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd6efeeae1d9f630fac784c02306562cd1600bf3f74f8e66c92017da04414560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd6efeeae1d9f630fac784c02306562cd1600bf3f74f8e66c92017da04414560", kill_on_drop: false }`
[INFO] [stdout] cd6efeeae1d9f630fac784c02306562cd1600bf3f74f8e66c92017da04414560
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56f21506dd29d922ed8a187743d98c4d721ae028ddd2e23b607e67006046b969
[INFO] running `Command { std: "docker" "start" "-a" "56f21506dd29d922ed8a187743d98c4d721ae028ddd2e23b607e67006046b969", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.162
[INFO] [stderr]    Compiling serde v1.0.162
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling semver v1.0.16
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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" "56f21506dd29d922ed8a187743d98c4d721ae028ddd2e23b607e67006046b969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56f21506dd29d922ed8a187743d98c4d721ae028ddd2e23b607e67006046b969", kill_on_drop: false }`
[INFO] [stdout] 56f21506dd29d922ed8a187743d98c4d721ae028ddd2e23b607e67006046b969
