[INFO] cloning repository https://github.com/theotherphil/talks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/theotherphil/talks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1497aa68a0bcbf21110a11d10c7294aed9d43012
[INFO] checking theotherphil/talks against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theotherphil/talks on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/theotherphil/talks
[INFO] finished tweaking git repo https://github.com/theotherphil/talks
[INFO] tweaked toml for git repo https://github.com/theotherphil/talks written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/theotherphil/talks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pulldown-cmark v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 109cf30d5d792fecb95f6afe71a6165198bbdee76666ee30d8c203ee18a30034
[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" "109cf30d5d792fecb95f6afe71a6165198bbdee76666ee30d8c203ee18a30034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "109cf30d5d792fecb95f6afe71a6165198bbdee76666ee30d8c203ee18a30034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "109cf30d5d792fecb95f6afe71a6165198bbdee76666ee30d8c203ee18a30034", kill_on_drop: false }`
[INFO] [stdout] 109cf30d5d792fecb95f6afe71a6165198bbdee76666ee30d8c203ee18a30034
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6bf4989db0ab9eab099d123da6a5aee8e84957ea9db40ac5454441c96addd85
[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" "e6bf4989db0ab9eab099d123da6a5aee8e84957ea9db40ac5454441c96addd85", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling pulldown-cmark v0.6.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking talks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `html`
[INFO] [stdout]  --> src/lib.rs:9:39
[INFO] [stdout]   |
[INFO] [stdout] 9 | use pulldown_cmark::{Parser, Options, html, Event, Tag};
[INFO] [stdout]   |                                       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]    --> src/lib.rs:218:56
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `split_markdown`
[INFO] [stdout]    --> src/lib.rs:163:4
[INFO] [stdout]     |
[INFO] [stdout] 163 | fn split_markdown<'a>(input: &'a str, sections: &[&str]) -> Vec<Vec<Event<'a>>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render`
[INFO] [stdout]    --> src/lib.rs:218:4
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `push_header`
[INFO] [stdout]    --> src/lib.rs:294:4
[INFO] [stdout]     |
[INFO] [stdout] 294 | fn push_header<'a>(out: &mut Vec<Event<'a>>, level: u32, text: &pulldown_cmark::CowStr<'a>) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]    --> src/lib.rs:218:56
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render`
[INFO] [stdout]    --> src/lib.rs:218:4
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `xs` as mutable because it is also borrowed as immutable
[INFO] [stdout]  --> examples/iterator_invalidation.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let x = &xs[0];
[INFO] [stdout]   |              -- immutable borrow occurs here
[INFO] [stdout] 5 |     xs.push(4);
[INFO] [stdout]   |     ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 6 |     println!("{}", x);
[INFO] [stdout]   |                    - immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `talks`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e6bf4989db0ab9eab099d123da6a5aee8e84957ea9db40ac5454441c96addd85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6bf4989db0ab9eab099d123da6a5aee8e84957ea9db40ac5454441c96addd85", kill_on_drop: false }`
[INFO] [stdout] e6bf4989db0ab9eab099d123da6a5aee8e84957ea9db40ac5454441c96addd85