[INFO] cloning repository https://github.com/kristoff3r/rust-talk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kristoff3r/rust-talk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristoff3r%2Frust-talk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristoff3r%2Frust-talk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef6071df0dd4b76cb32eb9a9cfad6b1030bd7ac2
[INFO] checking kristoff3r/rust-talk against try#da4929024a7261062885cb3209c9d7fdc919d233 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristoff3r%2Frust-talk" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kristoff3r/rust-talk on toolchain da4929024a7261062885cb3209c9d7fdc919d233
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+da4929024a7261062885cb3209c9d7fdc919d233" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kristoff3r/rust-talk
[INFO] finished tweaking git repo https://github.com/kristoff3r/rust-talk
[INFO] tweaked toml for git repo https://github.com/kristoff3r/rust-talk written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kristoff3r/rust-talk 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" "+da4929024a7261062885cb3209c9d7fdc919d233" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+da4929024a7261062885cb3209c9d7fdc919d233" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f654892ae138e5a25a42656a733761f9f33c5e6b65d081b7a4799eaf45e2e1f0
[INFO] running `Command { std: "docker" "start" "-a" "f654892ae138e5a25a42656a733761f9f33c5e6b65d081b7a4799eaf45e2e1f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f654892ae138e5a25a42656a733761f9f33c5e6b65d081b7a4799eaf45e2e1f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f654892ae138e5a25a42656a733761f9f33c5e6b65d081b7a4799eaf45e2e1f0", kill_on_drop: false }`
[INFO] [stdout] f654892ae138e5a25a42656a733761f9f33c5e6b65d081b7a4799eaf45e2e1f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+da4929024a7261062885cb3209c9d7fdc919d233" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c0312ec24248224a9befacec9b573502e823db15fd0cf1ba4c896989a341c6e
[INFO] running `Command { std: "docker" "start" "-a" "2c0312ec24248224a9befacec9b573502e823db15fd0cf1ba4c896989a341c6e", kill_on_drop: false }`
[INFO] [stderr]     Checking bumpalo v3.16.0
[INFO] [stderr]     Checking talk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `owned2`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let owned2 = "owned string".to_owned();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_owned2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `owned2`
[INFO] [stdout]   --> src/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let owned2 = "owned string".to_owned();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_owned2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |             let res = stack_value;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:96:17
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let res = arc_value;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |             let res = stack_value;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:96:17
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let res = arc_value;
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rc_val`
[INFO] [stdout]    --> src/main.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     let rc_val = Rc::new(42);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rc_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `refcell_ref`
[INFO] [stdout]    --> src/main.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let refcell_ref = &refcell_val;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_refcell_ref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rc_val`
[INFO] [stdout]    --> src/main.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     let rc_val = Rc::new(42);
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rc_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `refcell_ref`
[INFO] [stdout]    --> src/main.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     let refcell_ref = &refcell_val;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_refcell_ref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Foo` is never constructed
[INFO] [stdout]    --> src/main.rs:178:14
[INFO] [stdout]     |
[INFO] [stdout] 178 |     do_impl!(Foo);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Foo` is never constructed
[INFO] [stdout]    --> src/main.rs:178:14
[INFO] [stdout]     |
[INFO] [stdout] 178 |     do_impl!(Foo);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     do_impl!(Foo);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     do_impl!(Foo);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bar` is never constructed
[INFO] [stdout]    --> src/main.rs:179:14
[INFO] [stdout]     |
[INFO] [stdout] 179 |     do_impl!(Bar);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     do_impl!(Bar);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Baz` is never constructed
[INFO] [stdout]    --> src/main.rs:180:14
[INFO] [stdout]     |
[INFO] [stdout] 180 |     do_impl!(Baz);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bar` is never constructed
[INFO] [stdout]    --> src/main.rs:179:14
[INFO] [stdout]     |
[INFO] [stdout] 179 |     do_impl!(Bar);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 180 |     do_impl!(Baz);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     do_impl!(Bar);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Baz` is never constructed
[INFO] [stdout]    --> src/main.rs:180:14
[INFO] [stdout]     |
[INFO] [stdout] 180 |     do_impl!(Baz);
[INFO] [stdout]     |              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `some_method` is never used
[INFO] [stdout]    --> src/main.rs:171:20
[INFO] [stdout]     |
[INFO] [stdout] 170 |             impl $foo {
[INFO] [stdout]     |             --------- method in this implementation
[INFO] [stdout] 171 |                 fn some_method(&self) -> i32 {
[INFO] [stdout]     |                    ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 180 |     do_impl!(Baz);
[INFO] [stdout]     |     ------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `do_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     owned.as_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let _ = owned.as_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::as_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     str.as_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let _ = str.as_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `CStr::to_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     cstr.to_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this returns the result of the operation, without modifying the original
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = cstr.to_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `String::as_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     owned.as_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let _ = owned.as_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::as_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 55 |     str.as_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let _ = str.as_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `CStr::to_bytes` that must be used
[INFO] [stdout]   --> src/main.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     cstr.to_bytes();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this returns the result of the operation, without modifying the original
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = cstr.to_bytes();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "2c0312ec24248224a9befacec9b573502e823db15fd0cf1ba4c896989a341c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c0312ec24248224a9befacec9b573502e823db15fd0cf1ba4c896989a341c6e", kill_on_drop: false }`
[INFO] [stdout] 2c0312ec24248224a9befacec9b573502e823db15fd0cf1ba4c896989a341c6e