[INFO] cloning repository https://github.com/Kim-Dewelski/cyn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kim-Dewelski/cyn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKim-Dewelski%2Fcyn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKim-Dewelski%2Fcyn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fa01f16f27a9f85cf4927d6308f222cb8cbfa82
[INFO] checking Kim-Dewelski/cyn against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKim-Dewelski%2Fcyn" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Kim-Dewelski/cyn
[INFO] finished tweaking git repo https://github.com/Kim-Dewelski/cyn
[INFO] tweaked toml for git repo https://github.com/Kim-Dewelski/cyn written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Kim-Dewelski/cyn on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Kim-Dewelski/cyn 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7dfff382d54f50ff9aed7e1421b45cc0055261f951c6b422b56b5c03a45b9739
[INFO] running `Command { std: "docker" "start" "-a" "7dfff382d54f50ff9aed7e1421b45cc0055261f951c6b422b56b5c03a45b9739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7dfff382d54f50ff9aed7e1421b45cc0055261f951c6b422b56b5c03a45b9739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dfff382d54f50ff9aed7e1421b45cc0055261f951c6b422b56b5c03a45b9739", kill_on_drop: false }`
[INFO] [stdout] 7dfff382d54f50ff9aed7e1421b45cc0055261f951c6b422b56b5c03a45b9739
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b33b4e3b4bcfce5f3517156fc65305606f32e850aa8832210938cbf1e8b252ec
[INFO] running `Command { std: "docker" "start" "-a" "b33b4e3b4bcfce5f3517156fc65305606f32e850aa8832210938cbf1e8b252ec", kill_on_drop: false }`
[INFO] [stderr]     Checking peeking_take_while v1.0.0
[INFO] [stderr]     Checking cyn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `parse`
[INFO] [stdout]   --> src/initializer.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn parse(parse: ParseStream) -> Result<Self> {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_parse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parse`
[INFO] [stdout]   --> src/initializer.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn parse(parse: ParseStream) -> Result<Self> {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_parse`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/initializer.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 |         fn to_tokens(&self, tokens: &mut TokenStream) {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/initializer.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn to_tokens(&self, tokens: &mut TokenStream) {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]    --> src/specifier.rs:212:29
[INFO] [stdout]     |
[INFO] [stdout] 212 |         fn to_tokens(&self, tokens: &mut TokenStream) {}
[INFO] [stdout]     |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parse`
[INFO] [stdout]   --> src/initializer.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn parse(parse: ParseStream) -> Result<Self> {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_parse`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parse`
[INFO] [stdout]   --> src/initializer.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn parse(parse: ParseStream) -> Result<Self> {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_parse`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/initializer.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 |         fn to_tokens(&self, tokens: &mut TokenStream) {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/initializer.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 34 |         fn to_tokens(&self, tokens: &mut TokenStream) {
[INFO] [stdout]    |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Span` is never constructed
[INFO] [stdout]  --> src/span.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Span {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `start_token` and `end_token` are never read
[INFO] [stdout]  --> src/span.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Span {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 2 |     start_token: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 3 |     end_token: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffers/mod.rs:258:23
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn lookahead1(&self) -> Lookahead {
[INFO] [stdout]     |                       ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn lookahead1(&self) -> Lookahead<'_> {
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cyn` (lib) due to 1 previous error; 7 warnings emitted
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]    --> src/specifier.rs:212:29
[INFO] [stdout]     |
[INFO] [stdout] 212 |         fn to_tokens(&self, tokens: &mut TokenStream) {}
[INFO] [stdout]     |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Span` is never constructed
[INFO] [stdout]  --> src/span.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Span {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `start_token` and `end_token` are never read
[INFO] [stdout]  --> src/span.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Span {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 2 |     start_token: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 3 |     end_token: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffers/mod.rs:258:23
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn lookahead1(&self) -> Lookahead {
[INFO] [stdout]     |                       ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn lookahead1(&self) -> Lookahead<'_> {
[INFO] [stdout]     |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cyn` (lib test) due to 1 previous error; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b33b4e3b4bcfce5f3517156fc65305606f32e850aa8832210938cbf1e8b252ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33b4e3b4bcfce5f3517156fc65305606f32e850aa8832210938cbf1e8b252ec", kill_on_drop: false }`
[INFO] [stdout] b33b4e3b4bcfce5f3517156fc65305606f32e850aa8832210938cbf1e8b252ec
