[INFO] fetching crate syn-args 0.3.0...
[INFO] checking syn-args-0.3.0 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate syn-args 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate syn-args 0.3.0 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn-args 0.3.0
[INFO] finished tweaking crates.io crate syn-args 0.3.0
[INFO] tweaked toml for crates.io crate syn-args 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate syn-args 0.3.0 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn-args-derive v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8bfc11966ada8bfc84cf82f48f162a4b3c1543d94c44d7a0a00f97980031bd67
[INFO] running `Command { std: "docker" "start" "-a" "8bfc11966ada8bfc84cf82f48f162a4b3c1543d94c44d7a0a00f97980031bd67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bfc11966ada8bfc84cf82f48f162a4b3c1543d94c44d7a0a00f97980031bd67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bfc11966ada8bfc84cf82f48f162a4b3c1543d94c44d7a0a00f97980031bd67", kill_on_drop: false }`
[INFO] [stdout] 8bfc11966ada8bfc84cf82f48f162a4b3c1543d94c44d7a0a00f97980031bd67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de8cf31fddccd6db7716542b12157af4e3b456c61557c27005d98167b091d51f
[INFO] running `Command { std: "docker" "start" "-a" "de8cf31fddccd6db7716542b12157af4e3b456c61557c27005d98167b091d51f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling syn-args-derive v0.3.0
[INFO] [stderr]     Checking syn-args v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/macro_args/def/extends.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn try_from(value: &Value) -> Result<Self, Self::Error> {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/macro_args/def/extends.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn try_from(value: &Value) -> Result<Self, Self::Error> {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/lib.rs:39:33
[INFO] [stdout]    |
[INFO] [stdout] 39 |             if let Value::Array(args) = v {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:42:31
[INFO] [stdout]    |
[INFO] [stdout] 42 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:47:31
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:52:31
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:57:31
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:62:31
[INFO] [stdout]    |
[INFO] [stdout] 62 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:67:31
[INFO] [stdout]    |
[INFO] [stdout] 67 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:72:31
[INFO] [stdout]    |
[INFO] [stdout] 72 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err` is never read
[INFO] [stdout]   --> src/lib.rs:77:31
[INFO] [stdout]    |
[INFO] [stdout] 77 |                     Err(e) => err = e,
[INFO] [stdout]    |                               ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `T1` is more private than the item `ModuleArgs::F8::0`
[INFO] [stdout]   --> examples/test.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     F8(def::Option<T1>),
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^ field `ModuleArgs::F8::0` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `T1` is only usable at visibility `pub(crate)`
[INFO] [stdout]   --> examples/test.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct T1 {
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_value_p1` is never used
[INFO] [stdout]    --> examples/test.rs:189:4
[INFO] [stdout]     |
[INFO] [stdout] 189 | fn test_value_p1() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `T1` is more private than the item `ModuleArgs::F8::0`
[INFO] [stdout]    --> src/lib.rs:32:12
[INFO] [stdout]     |
[INFO] [stdout] 32  |         F8(def::Option<T1>),
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ field `ModuleArgs::F8::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `T1` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/lib.rs:266:5
[INFO] [stdout]     |
[INFO] [stdout] 266 |     struct T1 {
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_value_p1` is never used
[INFO] [stdout]    --> src/lib.rs:463:8
[INFO] [stdout]     |
[INFO] [stdout] 463 |     fn test_value_p1() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.85s
[INFO] running `Command { std: "docker" "inspect" "de8cf31fddccd6db7716542b12157af4e3b456c61557c27005d98167b091d51f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de8cf31fddccd6db7716542b12157af4e3b456c61557c27005d98167b091d51f", kill_on_drop: false }`
[INFO] [stdout] de8cf31fddccd6db7716542b12157af4e3b456c61557c27005d98167b091d51f