[INFO] fetching crate epub-builder 0.4.8...
[INFO] checking epub-builder-0.4.8 against try#9c1dcf141bc0875407c4eb36972857bd3db713e2 for pr-81863
[INFO] extracting crate epub-builder 0.4.8 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate epub-builder 0.4.8 on toolchain 9c1dcf141bc0875407c4eb36972857bd3db713e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate epub-builder 0.4.8
[INFO] finished tweaking crates.io crate epub-builder 0.4.8
[INFO] tweaked toml for crates.io crate epub-builder 0.4.8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate epub-builder 0.4.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "fetch" "--locked" "--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 error-chain v0.12.2
[INFO] [stderr]   Downloaded object v0.20.0
[INFO] [stderr]   Downloaded serde v1.0.113
[INFO] [stderr]   Downloaded html-escape v0.2.6
[INFO] [stderr]   Downloaded bzip2 v0.3.3
[INFO] [stderr]   Downloaded num-traits v0.2.12
[INFO] [stderr]   Downloaded utf8-width v0.1.4
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.8
[INFO] [stderr]   Downloaded num-integer v0.1.43
[INFO] [stderr]   Downloaded output_vt100 v0.1.2
[INFO] [stderr]   Downloaded mustache v0.9.0
[INFO] [stderr]   Downloaded pretty_assertions v0.6.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.18
[INFO] [stderr]   Downloaded bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]   Downloaded regex v1.3.9
[INFO] [stderr]   Downloaded cc v1.0.54
[INFO] [stderr]   Downloaded proc-macro2 v1.0.18
[INFO] [stderr]   Downloaded pkg-config v0.3.17
[INFO] [stderr]   Downloaded uuid v0.8.1
[INFO] [stderr]   Downloaded zip v0.5.6
[INFO] [stderr]   Downloaded ctor v0.1.15
[INFO] [stderr]   Downloaded backtrace v0.3.49
[INFO] [stderr]   Downloaded adler32 v1.1.0
[INFO] [stderr]   Downloaded flate2 v1.0.14
[INFO] [stderr]   Downloaded podio v0.1.7
[INFO] [stderr]   Downloaded difference v2.0.0
[INFO] [stderr]   Downloaded libc v0.2.71
[INFO] [stderr]   Downloaded gimli v0.21.0
[INFO] [stderr]   Downloaded syn v1.0.32
[INFO] [stderr]   Downloaded addr2line v0.12.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 432409f89bf1becc952e60074daf73a4ed74c00911e3e27ba2dca2a9fe5a13ab
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "432409f89bf1becc952e60074daf73a4ed74c00911e3e27ba2dca2a9fe5a13ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "432409f89bf1becc952e60074daf73a4ed74c00911e3e27ba2dca2a9fe5a13ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "432409f89bf1becc952e60074daf73a4ed74c00911e3e27ba2dca2a9fe5a13ab", kill_on_drop: false }`
[INFO] [stdout] 432409f89bf1becc952e60074daf73a4ed74c00911e3e27ba2dca2a9fe5a13ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9c1dcf141bc0875407c4eb36972857bd3db713e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2000654ea0cd2f5e6a8fbb512bf81bd4786154bb469cde3a226d5c6a8e97b344
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2000654ea0cd2f5e6a8fbb512bf81bd4786154bb469cde3a226d5c6a8e97b344", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking adler32 v1.1.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.113
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking utf8-width v0.1.4
[INFO] [stderr]     Checking podio v0.1.7
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking addr2line v0.12.2
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking html-escape v0.2.6
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking backtrace v0.3.49
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking zip v0.5.6
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]     Checking epub-builder v0.4.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.03s
[INFO] running `Command { std: "docker" "inspect" "2000654ea0cd2f5e6a8fbb512bf81bd4786154bb469cde3a226d5c6a8e97b344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2000654ea0cd2f5e6a8fbb512bf81bd4786154bb469cde3a226d5c6a8e97b344", kill_on_drop: false }`
[INFO] [stdout] 2000654ea0cd2f5e6a8fbb512bf81bd4786154bb469cde3a226d5c6a8e97b344