[INFO] cloning repository https://github.com/chriamue/rust-async-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chriamue/rust-async-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchriamue%2Frust-async-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchriamue%2Frust-async-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 01c03cca62e56add9898939849900a96b935704f
[INFO] building chriamue/rust-async-examples against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchriamue%2Frust-async-examples" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chriamue/rust-async-examples on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chriamue/rust-async-examples
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/chriamue/rust-async-examples
[INFO] tweaked toml for git repo https://github.com/chriamue/rust-async-examples written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/chriamue/rust-async-examples 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" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bf0f64c1d38c045145e7884793f928cf0aa50e7f200427f338dc134432b35f3
[INFO] running `Command { std: "docker" "start" "-a" "0bf0f64c1d38c045145e7884793f928cf0aa50e7f200427f338dc134432b35f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bf0f64c1d38c045145e7884793f928cf0aa50e7f200427f338dc134432b35f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bf0f64c1d38c045145e7884793f928cf0aa50e7f200427f338dc134432b35f3", kill_on_drop: false }`
[INFO] [stdout] 0bf0f64c1d38c045145e7884793f928cf0aa50e7f200427f338dc134432b35f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12db65f48114f606a57486fe13319200dec60ef9d2ee7eaf37ecf8c5364edfb5
[INFO] running `Command { std: "docker" "start" "-a" "12db65f48114f606a57486fe13319200dec60ef9d2ee7eaf37ecf8c5364edfb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling icu_locid_transform_data v1.5.1
[INFO] [stderr]    Compiling writeable v0.5.5
[INFO] [stderr]    Compiling litemap v0.7.5
[INFO] [stderr]    Compiling icu_properties_data v1.5.1
[INFO] [stderr]    Compiling icu_normalizer_data v1.5.1
[INFO] [stderr]    Compiling smallvec v1.15.0
[INFO] [stderr]    Compiling utf16_iter v1.0.5
[INFO] [stderr]    Compiling write16 v1.0.0
[INFO] [stderr]    Compiling utf8_iter v1.0.4
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling bytes v1.10.1
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling synstructure v0.13.1
[INFO] [stderr]    Compiling zerovec-derive v0.10.3
[INFO] [stderr]    Compiling displaydoc v0.2.5
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[INFO] [stderr]    Compiling icu_collections v1.5.0
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[INFO] [stderr]    Compiling icu_normalizer v1.5.0
[INFO] [stderr]    Compiling idna_adapter v1.2.0
[INFO] [stderr]    Compiling idna v1.0.3
[INFO] [stderr]    Compiling url v2.5.4
[INFO] [stderr]    Compiling rust-async-examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]  --> src/simple_http_client.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub async fn get(url: &str) -> io::Result<String> {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]   --> src/simple_http_client.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]   --> src/simple_http_client.rs:29:34
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.94s
[INFO] running `Command { std: "docker" "inspect" "12db65f48114f606a57486fe13319200dec60ef9d2ee7eaf37ecf8c5364edfb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12db65f48114f606a57486fe13319200dec60ef9d2ee7eaf37ecf8c5364edfb5", kill_on_drop: false }`
[INFO] [stdout] 12db65f48114f606a57486fe13319200dec60ef9d2ee7eaf37ecf8c5364edfb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bd27e019b3a80ac017e93360f9181c52fa58bedf2b979f0cc6b61c59ed9c601
[INFO] running `Command { std: "docker" "start" "-a" "2bd27e019b3a80ac017e93360f9181c52fa58bedf2b979f0cc6b61c59ed9c601", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]  --> src/simple_http_client.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub async fn get(url: &str) -> io::Result<String> {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]   --> src/simple_http_client.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]   --> src/simple_http_client.rs:29:34
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-async-examples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]  --> src/simple_http_client.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub async fn get(url: &str) -> io::Result<String> {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]   --> src/simple_http_client.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]   --> src/simple_http_client.rs:29:34
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub async fn post(url: &str, body: &str) -> io::Result<String> {
[INFO] [stdout]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "2bd27e019b3a80ac017e93360f9181c52fa58bedf2b979f0cc6b61c59ed9c601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bd27e019b3a80ac017e93360f9181c52fa58bedf2b979f0cc6b61c59ed9c601", kill_on_drop: false }`
[INFO] [stdout] 2bd27e019b3a80ac017e93360f9181c52fa58bedf2b979f0cc6b61c59ed9c601