[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 try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherreth%2Fepub_demo" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-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] 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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/therreth/epub_demo on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crypto v0.5.0
[INFO] [stderr]   Downloaded sha256 v1.1.3
[INFO] [stderr]   Downloaded regex-syntax v0.7.0
[INFO] [stderr]   Downloaded regex v1.8.0
[INFO] [stderr]   Downloaded epub v2.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2e9d51cc52669f1ca2b6c348b2a34bb9290875bc3659fa5bebe41a33e0c9d9d
[INFO] running `Command { std: "docker" "start" "-a" "c2e9d51cc52669f1ca2b6c348b2a34bb9290875bc3659fa5bebe41a33e0c9d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2e9d51cc52669f1ca2b6c348b2a34bb9290875bc3659fa5bebe41a33e0c9d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2e9d51cc52669f1ca2b6c348b2a34bb9290875bc3659fa5bebe41a33e0c9d9d", kill_on_drop: false }`
[INFO] [stdout] c2e9d51cc52669f1ca2b6c348b2a34bb9290875bc3659fa5bebe41a33e0c9d9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c66937603a446e9e34fbfb3d8d64904bd5cbb2cdc2e122518359e4b7d50aca56
[INFO] running `Command { std: "docker" "start" "-a" "c66937603a446e9e34fbfb3d8d64904bd5cbb2cdc2e122518359e4b7d50aca56", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking cpufeatures v0.2.7
[INFO] [stderr]     Checking regex-syntax v0.7.0
[INFO] [stderr]     Checking xml-rs v0.8.4
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking xxhash-rust v0.8.6
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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" "c66937603a446e9e34fbfb3d8d64904bd5cbb2cdc2e122518359e4b7d50aca56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c66937603a446e9e34fbfb3d8d64904bd5cbb2cdc2e122518359e4b7d50aca56", kill_on_drop: false }`
[INFO] [stdout] c66937603a446e9e34fbfb3d8d64904bd5cbb2cdc2e122518359e4b7d50aca56