[INFO] cloning repository https://github.com/therreth/epub_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/therreth/epub_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cabe42ac3445d186187a06bedf5e71863f8cfc0d
[INFO] checking therreth/epub_demo against master#e9271846294c4ee5bd7706df68180320c0b5ff20 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (732/796)
Updating files:  92% (733/796)
Updating files:  93% (741/796)
Updating files:  94% (749/796)
Updating files:  95% (757/796)
Updating files:  96% (765/796)
Updating files:  97% (773/796)
Updating files:  98% (781/796)
Updating files:  99% (789/796)
Updating files: 100% (796/796)
Updating files: 100% (796/796), done.
[INFO] validating manifest of git repo https://github.com/therreth/epub_demo on toolchain e9271846294c4ee5bd7706df68180320c0b5ff20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therreth/epub_demo
[INFO] finished tweaking git repo https://github.com/therreth/epub_demo
[INFO] tweaked toml for git repo https://github.com/therreth/epub_demo written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/therreth/epub_demo 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" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking therreth/epub_demo against try#b69bfeecc49bf5661cf54497638430035ff61aa4 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (732/796)
Updating files:  92% (733/796)
Updating files:  93% (741/796)
Updating files:  94% (749/796)
Updating files:  95% (757/796)
Updating files:  96% (765/796)
Updating files:  97% (773/796)
Updating files:  98% (781/796)
Updating files:  99% (789/796)
Updating files: 100% (796/796)
Updating files: 100% (796/796), done.
[INFO] validating manifest of git repo https://github.com/therreth/epub_demo on toolchain b69bfeecc49bf5661cf54497638430035ff61aa4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therreth/epub_demo
[INFO] finished tweaking git repo https://github.com/therreth/epub_demo
[INFO] tweaked toml for git repo https://github.com/therreth/epub_demo written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/therreth/epub_demo 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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking therreth/epub_demo against try#b69bfeecc49bf5661cf54497638430035ff61aa4 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  91% (732/796)
Updating files:  92% (733/796)
Updating files:  93% (741/796)
Updating files:  94% (749/796)
Updating files:  95% (757/796)
Updating files:  96% (765/796)
Updating files:  97% (773/796)
Updating files:  98% (781/796)
Updating files:  99% (789/796)
Updating files: 100% (796/796)
Updating files: 100% (796/796), done.
[INFO] validating manifest of git repo https://github.com/therreth/epub_demo on toolchain b69bfeecc49bf5661cf54497638430035ff61aa4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therreth/epub_demo
[INFO] finished tweaking git repo https://github.com/therreth/epub_demo
[INFO] tweaked toml for git repo https://github.com/therreth/epub_demo written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/therreth/epub_demo 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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "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 sha256 v1.1.3
[INFO] [stderr]   Downloaded epub v2.0.0
[INFO] [stderr]   Downloaded crypto v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2673342ff55975cb2e1eb89bff20b13b5bf315dc15a4ab0ed60d821eb5eda930
[INFO] running `Command { std: "docker" "start" "-a" "2673342ff55975cb2e1eb89bff20b13b5bf315dc15a4ab0ed60d821eb5eda930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2673342ff55975cb2e1eb89bff20b13b5bf315dc15a4ab0ed60d821eb5eda930", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2673342ff55975cb2e1eb89bff20b13b5bf315dc15a4ab0ed60d821eb5eda930", kill_on_drop: false }`
[INFO] [stdout] 2673342ff55975cb2e1eb89bff20b13b5bf315dc15a4ab0ed60d821eb5eda930
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d76700b010c3fa817ae56a425456449fd0c20b00c8c7ade1f6c7b339fb9a22b
[INFO] running `Command { std: "docker" "start" "-a" "4d76700b010c3fa817ae56a425456449fd0c20b00c8c7ade1f6c7b339fb9a22b", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[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] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4d76700b010c3fa817ae56a425456449fd0c20b00c8c7ade1f6c7b339fb9a22b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d76700b010c3fa817ae56a425456449fd0c20b00c8c7ade1f6c7b339fb9a22b", kill_on_drop: false }`
[INFO] [stdout] 4d76700b010c3fa817ae56a425456449fd0c20b00c8c7ade1f6c7b339fb9a22b