[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 master#2f3dc46465c04d10cb74d34b1bd80c3ebfdc05bf for pr-128725
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theotherphil/talks on toolchain 2f3dc46465c04d10cb74d34b1bd80c3ebfdc05bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2f3dc46465c04d10cb74d34b1bd80c3ebfdc05bf" "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-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2f3dc46465c04d10cb74d34b1bd80c3ebfdc05bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking theotherphil/talks against try#9c7f973c4f483238f1484927772d0446e5686cc0 for pr-128725
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheotherphil%2Ftalks" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theotherphil/talks on toolchain 9c7f973c4f483238f1484927772d0446e5686cc0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7f973c4f483238f1484927772d0446e5686cc0" "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-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7f973c4f483238f1484927772d0446e5686cc0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v0.6.13
[INFO] [stderr]   Downloaded unicode-xid v0.1.0
[INFO] [stderr]   Downloaded version_check v0.1.5
[INFO] [stderr]   Downloaded proc-macro2 v0.4.30
[INFO] [stderr]   Downloaded getopts v0.2.21
[INFO] [stderr]   Downloaded unicode-width v0.1.6
[INFO] [stderr]   Downloaded bitflags v1.2.0
[INFO] [stderr]   Downloaded arrayvec v0.4.11
[INFO] [stderr]   Downloaded serde v1.0.97
[INFO] [stderr]   Downloaded serde_json v1.0.40
[INFO] [stderr]   Downloaded serde_derive v1.0.97
[INFO] [stderr]   Downloaded syn v0.15.39
[INFO] [stderr]   Downloaded memchr v2.2.1
[INFO] [stderr]   Downloaded unicase v2.5.1
[INFO] [stderr]   Downloaded itoa v0.4.4
[INFO] [stderr]   Downloaded ryu v1.0.0
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] [stderr]   Downloaded pulldown-cmark v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+9c7f973c4f483238f1484927772d0446e5686cc0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07538fb6b6bbbca9d38ea8da0ec8991b9e1ec6f5ef933c0b610c1ffe82a4a0f4
[INFO] running `Command { std: "docker" "start" "-a" "07538fb6b6bbbca9d38ea8da0ec8991b9e1ec6f5ef933c0b610c1ffe82a4a0f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07538fb6b6bbbca9d38ea8da0ec8991b9e1ec6f5ef933c0b610c1ffe82a4a0f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07538fb6b6bbbca9d38ea8da0ec8991b9e1ec6f5ef933c0b610c1ffe82a4a0f4", kill_on_drop: false }`
[INFO] [stdout] 07538fb6b6bbbca9d38ea8da0ec8991b9e1ec6f5ef933c0b610c1ffe82a4a0f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+9c7f973c4f483238f1484927772d0446e5686cc0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67f5414967f904d5c21e0ebc0a176725846e73db766424388400e75c5c1376de
[INFO] running `Command { std: "docker" "start" "-a" "67f5414967f904d5c21e0ebc0a176725846e73db766424388400e75c5c1376de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling libc v0.2.60
[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 bitflags v1.2.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling pulldown-cmark v0.6.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]    Compiling quote v0.6.13
[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 `split_markdown` is never used
[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 `render` is never used
[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 `push_header` is never used
[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: function `render` is never used
[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: 5 warnings emitted
[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 1 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` (example "iterator_invalidation") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `source` is never read
[INFO] [stdout]  --> examples/data_race.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Image {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 6 |     source: String
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Image` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "67f5414967f904d5c21e0ebc0a176725846e73db766424388400e75c5c1376de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67f5414967f904d5c21e0ebc0a176725846e73db766424388400e75c5c1376de", kill_on_drop: false }`
[INFO] [stdout] 67f5414967f904d5c21e0ebc0a176725846e73db766424388400e75c5c1376de