[INFO] updating cached repository https://github.com/theotherphil/talks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1497aa68a0bcbf21110a11d10c7294aed9d43012
[INFO] testing theotherphil/talks against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theotherphil/talks on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", 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-3/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" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb5a7bd7501e3147f188d0c3a6c62b69b6c6b576a8776dc46fd6742cc9c25e2c
[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" "bb5a7bd7501e3147f188d0c3a6c62b69b6c6b576a8776dc46fd6742cc9c25e2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb5a7bd7501e3147f188d0c3a6c62b69b6c6b576a8776dc46fd6742cc9c25e2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb5a7bd7501e3147f188d0c3a6c62b69b6c6b576a8776dc46fd6742cc9c25e2c", kill_on_drop: false }`
[INFO] [stdout] bb5a7bd7501e3147f188d0c3a6c62b69b6c6b576a8776dc46fd6742cc9c25e2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4a1d2ed9f840cb420eef3b92c774865052dd1b990232190e10a50d7f07e945eb
[INFO] running `Command { std: "docker" "start" "-a" "4a1d2ed9f840cb420eef3b92c774865052dd1b990232190e10a50d7f07e945eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]    Compiling serde v1.0.97
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling pulldown-cmark v0.6.0
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.97
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling 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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.21s
[INFO] running `Command { std: "docker" "inspect" "4a1d2ed9f840cb420eef3b92c774865052dd1b990232190e10a50d7f07e945eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a1d2ed9f840cb420eef3b92c774865052dd1b990232190e10a50d7f07e945eb", kill_on_drop: false }`
[INFO] [stdout] 4a1d2ed9f840cb420eef3b92c774865052dd1b990232190e10a50d7f07e945eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52b51181c3a3db9a66693444116c932e38f238c7f7449286501c550657838319
[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" "52b51181c3a3db9a66693444116c932e38f238c7f7449286501c550657838319", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 5 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] [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: `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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "52b51181c3a3db9a66693444116c932e38f238c7f7449286501c550657838319", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52b51181c3a3db9a66693444116c932e38f238c7f7449286501c550657838319", kill_on_drop: false }`
[INFO] [stdout] 52b51181c3a3db9a66693444116c932e38f238c7f7449286501c550657838319