[INFO] fetching crate optargs 0.1.2...
[INFO] testing optargs-0.1.2 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate optargs 0.1.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate optargs 0.1.2
[INFO] finished tweaking crates.io crate optargs 0.1.2
[INFO] tweaked toml for crates.io crate optargs 0.1.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate optargs 0.1.2 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate optargs 0.1.2 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97c57cd97d8233703bb474a42c52d10ff4563b5dc746ce3d6f751b1f3689c71c
[INFO] running `Command { std: "docker" "start" "-a" "97c57cd97d8233703bb474a42c52d10ff4563b5dc746ce3d6f751b1f3689c71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97c57cd97d8233703bb474a42c52d10ff4563b5dc746ce3d6f751b1f3689c71c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97c57cd97d8233703bb474a42c52d10ff4563b5dc746ce3d6f751b1f3689c71c", kill_on_drop: false }`
[INFO] [stdout] 97c57cd97d8233703bb474a42c52d10ff4563b5dc746ce3d6f751b1f3689c71c
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 905ec9522794fde2705c23ba282934546f5ad3fd16ac69686872a5865e0b6fc2
[INFO] running `Command { std: "docker" "start" "-a" "905ec9522794fde2705c23ba282934546f5ad3fd16ac69686872a5865e0b6fc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling optargs-macro v0.1.2
[INFO] [stderr]    Compiling optargs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized] target(s) in 7.85s
[INFO] running `Command { std: "docker" "inspect" "905ec9522794fde2705c23ba282934546f5ad3fd16ac69686872a5865e0b6fc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "905ec9522794fde2705c23ba282934546f5ad3fd16ac69686872a5865e0b6fc2", kill_on_drop: false }`
[INFO] [stdout] 905ec9522794fde2705c23ba282934546f5ad3fd16ac69686872a5865e0b6fc2
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8adad69f6560dc1ca30f8d14638c6a712a6e4e44707d10d28805221d3e5c108e
[INFO] running `Command { std: "docker" "start" "-a" "8adad69f6560dc1ca30f8d14638c6a712a6e4e44707d10d28805221d3e5c108e", kill_on_drop: false }`
[INFO] [stderr]    Compiling optargs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: trailing semicolon in macro used in expression position
[INFO] [stdout]   --> examples/optstruct_reference.rs:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |         $src.0 = Some($value);
[INFO] [stdout]    |                              ^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     let p = Example! { a: 10 };
[INFO] [stdout]    |             ------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]    = note: macro invocations at the end of a block are treated as expressions
[INFO] [stdout]    = note: to ignore the value produced by the macro, add a semicolon after the invocation of `Example`
[INFO] [stdout]    = note: `#[deny(semicolon_in_expressions_from_macros)]` (part of `#[deny(future_incompatible)]`) on by default
[INFO] [stdout]    = note: this error originates in the macro `Example` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/optstruct_reference.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn build(mut self) -> bool {
[INFO] [stdout]   |              ----^^^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> examples/optstruct_reference.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let p = Example! { a: 10 };
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `optargs` (example "optstruct_reference") due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> examples/optstruct_reference.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Example {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 4 |     a: i32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 5 |     b: Option<&'static str>,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: method `build` is never used
[INFO] [stdout]  --> examples/optstruct_reference.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Example {
[INFO] [stdout]   | ------------ method in this implementation
[INFO] [stdout] 8 |     fn build(mut self) -> bool {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> examples/optfn_reference.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn example(a: i32, b: Option<&str>) {}
[INFO] [stdout]   |            ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> examples/optfn_reference.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn example(a: i32, b: Option<&str>) {}
[INFO] [stdout]   |                    ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `b` is never used
[INFO] [stdout]   --> examples/optfn_reference.rs:22:51
[INFO] [stdout]    |
[INFO] [stdout] 22 |             impl<const A: bool> Validator<A> { fn b(self) -> Validator<A> { self  }}
[INFO] [stdout]    |             --------------------------------      ^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     example_src!(a: 10);
[INFO] [stdout]    |     ------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `example_src` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> examples/optfn_multiple_dyns.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn blah2(a: Option<&dyn Iterator<Item = i32>>) {}
[INFO] [stdout]   |          ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> examples/optstruct_demo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Example {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 3 |     a: i32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 4 |     b: Option<String>,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8adad69f6560dc1ca30f8d14638c6a712a6e4e44707d10d28805221d3e5c108e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8adad69f6560dc1ca30f8d14638c6a712a6e4e44707d10d28805221d3e5c108e", kill_on_drop: false }`
[INFO] [stdout] 8adad69f6560dc1ca30f8d14638c6a712a6e4e44707d10d28805221d3e5c108e
