[INFO] cloning repository https://github.com/theotherphil/talks
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1497aa68a0bcbf21110a11d10c7294aed9d43012
[INFO] checking theotherphil/talks against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks" "/workspace/builds/worker-1/source"`
[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 e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e4ab9562b5d59879205455c7b1620e46d11867bb3b180e6107f1b82b16304426
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "e4ab9562b5d59879205455c7b1620e46d11867bb3b180e6107f1b82b16304426"`
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking memoffset v0.2.1
[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 itoa v0.4.4
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]    Compiling unicase v2.5.1
[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]    Compiling syn v0.15.39
[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] [stderr] warning: unused import: `html`
[INFO] [stderr]  --> src/lib.rs:9:39
[INFO] [stderr]   |
[INFO] [stderr] 9 | use pulldown_cmark::{Parser, Options, html, Event, Tag};
[INFO] [stderr]   |                                       ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `w`
[INFO] [stderr]    --> src/lib.rs:218:56
[INFO] [stderr]     |
[INFO] [stderr] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `w`
[INFO] [stderr]    --> src/lib.rs:218:56
[INFO] [stderr]     |
[INFO] [stderr] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render`
[INFO] [stderr]    --> src/lib.rs:218:4
[INFO] [stderr]     |
[INFO] [stderr] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_markdown`
[INFO] [stderr]    --> src/lib.rs:163:4
[INFO] [stderr]     |
[INFO] [stderr] 163 | fn split_markdown<'a>(input: &'a str, sections: &[&str]) -> Vec<Vec<Event<'a>>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render`
[INFO] [stderr]    --> src/lib.rs:218:4
[INFO] [stderr]     |
[INFO] [stderr] 218 | fn render<'a, W: Write, I: Iterator<Item = Event<'a>>>(w: &mut W, iter: I) {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `push_header`
[INFO] [stderr]    --> src/lib.rs:294:4
[INFO] [stderr]     |
[INFO] [stderr] 294 | fn push_header<'a>(out: &mut Vec<Event<'a>>, level: u32, text: &pulldown_cmark::CowStr<'a>) {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `xs` as mutable because it is also borrowed as immutable
[INFO] [stderr]  --> examples/iterator_invalidation.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let x = &xs[0];
[INFO] [stderr]   |              -- immutable borrow occurs here
[INFO] [stderr] 5 |     xs.push(4);
[INFO] [stderr]   |     ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 6 |     println!("{}", x);
[INFO] [stderr]   |                    - immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[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 `"docker" "inspect" "e4ab9562b5d59879205455c7b1620e46d11867bb3b180e6107f1b82b16304426"`
[INFO] running `"docker" "rm" "-f" "e4ab9562b5d59879205455c7b1620e46d11867bb3b180e6107f1b82b16304426"`
[INFO] [stdout] e4ab9562b5d59879205455c7b1620e46d11867bb3b180e6107f1b82b16304426