[INFO] fetching crate reflective 0.1.0...
[INFO] checking reflective-0.1.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate reflective 0.1.0 into /workspace/builds/worker-39/source
[INFO] validating manifest of crates.io crate reflective 0.1.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate reflective 0.1.0
[INFO] finished tweaking crates.io crate reflective 0.1.0
[INFO] tweaked toml for crates.io crate reflective 0.1.0 written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b99b766ebe0954c32e77ac6731400e4ddd641ac4502e938ca02f9126fa0472a
[INFO] running `Command { std: "docker" "start" "-a" "3b99b766ebe0954c32e77ac6731400e4ddd641ac4502e938ca02f9126fa0472a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b99b766ebe0954c32e77ac6731400e4ddd641ac4502e938ca02f9126fa0472a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b99b766ebe0954c32e77ac6731400e4ddd641ac4502e938ca02f9126fa0472a", kill_on_drop: false }`
[INFO] [stdout] 3b99b766ebe0954c32e77ac6731400e4ddd641ac4502e938ca02f9126fa0472a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f12ac3ee36ce28e90a021c7b838822cd42163b66993b2588f8c3a41ef788325
[INFO] running `Command { std: "docker" "start" "-a" "3f12ac3ee36ce28e90a021c7b838822cd42163b66993b2588f8c3a41ef788325", kill_on_drop: false }`
[INFO] [stderr]    Compiling reflective v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `struct_body`
[INFO] [stdout]   --> src/lib.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let struct_body : TokenStream;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_struct_body`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `datatype`
[INFO] [stdout]   --> src/lib.rs:89:16
[INFO] [stdout]    |
[INFO] [stdout] 89 |     for (field,datatype) in &struct_props {
[INFO] [stdout]    |                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_datatype`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `struct_body`
[INFO] [stdout]   --> src/lib.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let struct_body : TokenStream;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_struct_body`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `datatype`
[INFO] [stdout]   --> src/lib.rs:89:16
[INFO] [stdout]    |
[INFO] [stdout] 89 |     for (field,datatype) in &struct_props {
[INFO] [stdout]    |                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_datatype`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `struct_body`
[INFO] [stdout]   --> src/lib.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let struct_body : TokenStream;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_struct_body`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `datatype`
[INFO] [stdout]   --> src/lib.rs:89:16
[INFO] [stdout]    |
[INFO] [stdout] 89 |     for (field,datatype) in &struct_props {
[INFO] [stdout]    |                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_datatype`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] pub struct TestStruct { name : & 'static str, }
[INFO] [stdout] impl TestStruct {
[INFO] [stdout]      fn get_field<T: Copy + 'static>(s: &TestStruct, field: &str) -> T {
[INFO] [stdout]         let a : &dyn std::any::Any = { match field 
[INFO] [stdout] 
{"name" => &(s.name) as &dyn std::any::Any,
[INFO] [stdout] 
_ => panic!("Invalid field."), }};
[INFO] [stdout]         *(a.downcast_ref::<T>().unwrap())
[INFO] [stdout]     }
[INFO] [stdout] 
[INFO] [stdout]      fn set_field<T: Copy + 'static>(s: &mut TestStruct, field: &str, val : T) {
[INFO] [stdout]         match field {
[INFO] [stdout]             "name" => { s.name = ((&val as &dyn std::any::Any).downcast_ref::<&'static str>().unwrap()).to_owned(); },
[INFO] [stdout] _ => { panic!("invalid field"); } }
[INFO] [stdout]     }
[INFO] [stdout] }
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/fields.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut res : &str = TestStruct::get_field(s, "name");
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
[INFO] running `Command { std: "docker" "inspect" "3f12ac3ee36ce28e90a021c7b838822cd42163b66993b2588f8c3a41ef788325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f12ac3ee36ce28e90a021c7b838822cd42163b66993b2588f8c3a41ef788325", kill_on_drop: false }`
[INFO] [stdout] 3f12ac3ee36ce28e90a021c7b838822cd42163b66993b2588f8c3a41ef788325