[INFO] cloning repository https://github.com/samueloliveiraf/read-email-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samueloliveiraf/read-email-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamueloliveiraf%2Fread-email-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamueloliveiraf%2Fread-email-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa2864b50c9cea975fe041a87095b9b895103e5d
[INFO] checking samueloliveiraf/read-email-rust against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamueloliveiraf%2Fread-email-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/samueloliveiraf/read-email-rust
[INFO] finished tweaking git repo https://github.com/samueloliveiraf/read-email-rust
[INFO] tweaked toml for git repo https://github.com/samueloliveiraf/read-email-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/samueloliveiraf/read-email-rust on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/samueloliveiraf/read-email-rust 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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "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 cxxbridge-macro v1.0.89
[INFO] [stderr]   Downloaded imap-proto v0.10.2
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.89
[INFO] [stderr]   Downloaded imap v2.4.1
[INFO] [stderr]   Downloaded cxx-build v1.0.89
[INFO] [stderr]   Downloaded cxx v1.0.89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9049ea680a67ca2197c8667b84cf7aed19733e649fec691272acca50d82a3e19
[INFO] running `Command { std: "docker" "start" "-a" "9049ea680a67ca2197c8667b84cf7aed19733e649fec691272acca50d82a3e19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9049ea680a67ca2197c8667b84cf7aed19733e649fec691272acca50d82a3e19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9049ea680a67ca2197c8667b84cf7aed19733e649fec691272acca50d82a3e19", kill_on_drop: false }`
[INFO] [stdout] 9049ea680a67ca2197c8667b84cf7aed19733e649fec691272acca50d82a3e19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6992087636c84b60ef476d002bab790261bf5ce542a7707ac1a946780f52f8b
[INFO] running `Command { std: "docker" "start" "-a" "b6992087636c84b60ef476d002bab790261bf5ce542a7707ac1a946780f52f8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling openssl-sys v0.9.80
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking iana-time-zone v0.1.53
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking bufstream 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-macro2-1.0.51/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]     Checking aho-corasick v0.7.20
[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" "b6992087636c84b60ef476d002bab790261bf5ce542a7707ac1a946780f52f8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6992087636c84b60ef476d002bab790261bf5ce542a7707ac1a946780f52f8b", kill_on_drop: false }`
[INFO] [stdout] b6992087636c84b60ef476d002bab790261bf5ce542a7707ac1a946780f52f8b