[INFO] crate serde_closure 0.2.10 is already in cache
[INFO] checking serde_closure-0.2.10 against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] extracting crate serde_closure 0.2.10 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate serde_closure 0.2.10 on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate serde_closure 0.2.10
[INFO] finished tweaking crates.io crate serde_closure 0.2.10
[INFO] tweaked toml for crates.io crate serde_closure 0.2.10 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 72df02e5ae1c9fc3d0d4b8b3b6bbfc7fb5a185f6c0be2d76d0b1f97d47a17dcb
[INFO] running `"docker" "start" "-a" "72df02e5ae1c9fc3d0d4b8b3b6bbfc7fb5a185f6c0be2d76d0b1f97d47a17dcb"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling serde_closure_derive v0.2.10
[INFO] [stderr]     Checking serde v1.0.106
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking serde_closure v0.2.10 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> tests/test.rs:376:25
[INFO] [stderr]     |
[INFO] [stderr] 376 |     let closure = FnOnce!(|x: &str| "test");
[INFO] [stderr]     |                            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> tests/test.rs:467:7
[INFO] [stderr]     |
[INFO] [stderr] 467 |         let a = &STATIC;
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:100:18
[INFO] [stderr]     |
[INFO] [stderr] 100 |       let c = FnOnce!(move || -> String {
[INFO] [stderr]     |                       ^----
[INFO] [stderr]     |                       |
[INFO] [stderr]     |  _____________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 101 | |         for task in tasks {
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:387:24
[INFO] [stderr]     |
[INFO] [stderr] 387 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |                             ^----
[INFO] [stderr]     |                             |
[INFO] [stderr]     |  ___________________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 388 | |         (b)();
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:387:24
[INFO] [stderr]     |
[INFO] [stderr] 387 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |                             ^----
[INFO] [stderr]     |                             |
[INFO] [stderr]     |  ___________________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 388 | |         (b)();
[INFO] [stderr] 389 | |         // b();
[INFO] [stderr] 390 | |         // (b::<>)();
[INFO] [stderr] 391 | |         c;
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:406:24
[INFO] [stderr]     |
[INFO] [stderr] 406 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |                             ^----
[INFO] [stderr]     |                             |
[INFO] [stderr]     |  ___________________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 407 | |         (b)();
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:417:24
[INFO] [stderr]     |
[INFO] [stderr] 417 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |                             ^----
[INFO] [stderr]     |                             |
[INFO] [stderr]     |  ___________________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 418 | |         // (b)();
[INFO] [stderr] 419 | |         // b();
[INFO] [stderr] 420 | |         // (b::<>)();
[INFO] [stderr] 421 | |         c;
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:450:11
[INFO] [stderr]     |
[INFO] [stderr] 450 |           FnOnce!(move || {
[INFO] [stderr]     |                   ^----
[INFO] [stderr]     |                   |
[INFO] [stderr]     |  _________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 451 | |             let _ = x;
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:456:11
[INFO] [stderr]     |
[INFO] [stderr] 456 |           FnOnce!(move || {
[INFO] [stderr]     |                   ^----
[INFO] [stderr]     |                   |
[INFO] [stderr]     |  _________________help: remove this `mut`
[INFO] [stderr]     | |
[INFO] [stderr] 457 | |             let _ = x;
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/test.rs:477:28
[INFO] [stderr]     |
[INFO] [stderr] 477 |         ::serde_closure::FnOnce!(|| a);
[INFO] [stderr]     |                                  ---^
[INFO] [stderr]     |                                  |
[INFO] [stderr]     |                                  help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:387:24
[INFO] [stderr]     |
[INFO] [stderr] 387 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |  ___________________________^
[INFO] [stderr] 388 | |         (b)();
[INFO] [stderr] 389 | |         // b();
[INFO] [stderr] 390 | |         // (b::<>)();
[INFO] [stderr] 391 | |         c;
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(path_statements)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:393:3
[INFO] [stderr]     |
[INFO] [stderr] 393 |         size_of::<()>;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:417:24
[INFO] [stderr]     |
[INFO] [stderr] 417 |       let closure = FnOnce!(move || {
[INFO] [stderr]     |  ___________________________^
[INFO] [stderr] 418 | |         // (b)();
[INFO] [stderr] 419 | |         // b();
[INFO] [stderr] 420 | |         // (b::<>)();
[INFO] [stderr] 421 | |         c;
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:423:3
[INFO] [stderr]     |
[INFO] [stderr] 423 |         size_of::<()>;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:426:3
[INFO] [stderr]     |
[INFO] [stderr] 426 |         capturing::<>;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:432:3
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Foo;
[INFO] [stderr]     |         ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]    --> tests/test.rs:433:3
[INFO] [stderr]     |
[INFO] [stderr] 433 |         foo::<>;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.48s
[INFO] running `"docker" "inspect" "72df02e5ae1c9fc3d0d4b8b3b6bbfc7fb5a185f6c0be2d76d0b1f97d47a17dcb"`
[INFO] running `"docker" "rm" "-f" "72df02e5ae1c9fc3d0d4b8b3b6bbfc7fb5a185f6c0be2d76d0b1f97d47a17dcb"`
[INFO] [stdout] 72df02e5ae1c9fc3d0d4b8b3b6bbfc7fb5a185f6c0be2d76d0b1f97d47a17dcb
