[INFO] cloning repository https://github.com/mzyl/bookbytes3.0
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mzyl/bookbytes3.0" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzyl%2Fbookbytes3.0", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzyl%2Fbookbytes3.0'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fbe96c75280a63e6430cf789a8f06a553e73975d
[INFO] checking mzyl/bookbytes3.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzyl%2Fbookbytes3.0" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mzyl/bookbytes3.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mzyl/bookbytes3.0
[INFO] finished tweaking git repo https://github.com/mzyl/bookbytes3.0
[INFO] tweaked toml for git repo https://github.com/mzyl/bookbytes3.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/mzyl/bookbytes3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded kuchiki v0.8.1
[INFO] [stderr]   Downloaded epub v1.2.3
[INFO] [stderr]   Downloaded zip v0.5.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2571bcccd4e04d1269705c67ed84df83a80defdd43b3069f9388ddc74c5984ed
[INFO] running `Command { std: "docker" "start" "-a" "2571bcccd4e04d1269705c67ed84df83a80defdd43b3069f9388ddc74c5984ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2571bcccd4e04d1269705c67ed84df83a80defdd43b3069f9388ddc74c5984ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2571bcccd4e04d1269705c67ed84df83a80defdd43b3069f9388ddc74c5984ed", kill_on_drop: false }`
[INFO] [stdout] 2571bcccd4e04d1269705c67ed84df83a80defdd43b3069f9388ddc74c5984ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37ab5ef7a0897369d56f9e4177db4057cb4eadaf056c0a931926c8cd07ff5a6b
[INFO] running `Command { std: "docker" "start" "-a" "37ab5ef7a0897369d56f9e4177db4057cb4eadaf056c0a931926c8cd07ff5a6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking anyhow v1.0.40
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling derive_more v0.99.13
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking zip v0.5.12
[INFO] [stderr]     Checking epub v1.2.3
[INFO] [stderr]     Checking kuchiki v0.8.1
[INFO] [stderr]     Checking bookbytes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::selector::*`
[INFO] [stdout]  --> src/book.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::selector::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ElementData`
[INFO] [stdout]  --> src/book.rs:4:34
[INFO] [stdout]   |
[INFO] [stdout] 4 | use kuchiki::{NodeData, NodeRef, ElementData};
[INFO] [stdout]   |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::selector::*`
[INFO] [stdout]  --> src/book.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::selector::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ElementData`
[INFO] [stdout]  --> src/book.rs:4:34
[INFO] [stdout]   |
[INFO] [stdout] 4 | use kuchiki::{NodeData, NodeRef, ElementData};
[INFO] [stdout]   |                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `el`
[INFO] [stdout]   --> src/book.rs:77:27
[INFO] [stdout]    |
[INFO] [stdout] 77 |         NodeData::Element(el) => {
[INFO] [stdout]    |                           ^^ help: if this is intentional, prefix it with an underscore: `_el`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `el`
[INFO] [stdout]   --> src/book.rs:77:27
[INFO] [stdout]    |
[INFO] [stdout] 77 |         NodeData::Element(el) => {
[INFO] [stdout]    |                           ^^ help: if this is intentional, prefix it with an underscore: `_el`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing local variable `words`
[INFO] [stdout]   --> src/book.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let html: Vec<&str> = words
[INFO] [stdout]    |                           ----- `words` is borrowed here
[INFO] [stdout] ...
[INFO] [stdout] 27 |     html
[INFO] [stdout]    |     ^^^^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing local variable `words`
[INFO] [stdout]   --> src/book.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let html: Vec<&str> = words
[INFO] [stdout]    |                           ----- `words` is borrowed here
[INFO] [stdout] ...
[INFO] [stdout] 27 |     html
[INFO] [stdout]    |     ^^^^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bookbytes` due to 2 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "37ab5ef7a0897369d56f9e4177db4057cb4eadaf056c0a931926c8cd07ff5a6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37ab5ef7a0897369d56f9e4177db4057cb4eadaf056c0a931926c8cd07ff5a6b", kill_on_drop: false }`
[INFO] [stdout] 37ab5ef7a0897369d56f9e4177db4057cb4eadaf056c0a931926c8cd07ff5a6b