[INFO] crate concread 0.1.8 is already in cache
[INFO] checking concread-0.1.8 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate concread 0.1.8 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate concread 0.1.8 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate concread 0.1.8
[INFO] finished tweaking crates.io crate concread 0.1.8
[INFO] tweaked toml for crates.io crate concread 0.1.8 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate concread 0.1.8 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "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] a1d788331f1e6bd37501a0f74ded82ebde98b8ebc73f3dcc534c8c2a683d9b98
[INFO] running `"docker" "start" "-a" "a1d788331f1e6bd37501a0f74ded82ebde98b8ebc73f3dcc534c8c2a683d9b98"`
[INFO] [stderr]    Compiling standback v0.2.1
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking num-iter v0.1.40
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking time v0.2.9
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking concread v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr] warning: type annotations needed
[INFO] [stderr]    --> src/collections/bptree/node.rs:230:37
[INFO] [stderr]     |
[INFO] [stderr] 230 |             new.key[0].as_mut_ptr().write(pivot);
[INFO] [stderr]     |                                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(tyvar_behind_raw_pointer)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stderr]     = note: for more information, see issue #46906 <https://github.com/rust-lang/rust/issues/46906>
[INFO] [stderr] 
[INFO] [stderr] warning: type annotations needed
[INFO] [stderr]    --> src/collections/bptree/node.rs:230:37
[INFO] [stderr]     |
[INFO] [stderr] 230 |             new.key[0].as_mut_ptr().write(pivot);
[INFO] [stderr]     |                                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(tyvar_behind_raw_pointer)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
[INFO] [stderr]     = note: for more information, see issue #46906 <https://github.com/rust-lang/rust/issues/46906>
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `verify`
[INFO] [stderr]    --> src/collections/bptree/map.rs:398:5
[INFO] [stderr]     |
[INFO] [stderr] 398 |     pub(crate) fn verify(&self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/cowcell.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 | /         scope(|scope| {
[INFO] [stderr] 284 | |             let cc_ref = &cc;
[INFO] [stderr] 285 | |
[INFO] [stderr] 286 | |             let _readers: Vec<_> = (0..7)
[INFO] [stderr] ...   |
[INFO] [stderr] 317 | |                 .collect();
[INFO] [stderr] 318 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/cowcell.rs:359:9
[INFO] [stderr]     |
[INFO] [stderr] 359 | /         scope(|scope| {
[INFO] [stderr] 360 | |             let cc_ref = &cc;
[INFO] [stderr] 361 | |             let _writers: Vec<_> = (0..3)
[INFO] [stderr] 362 | |                 .map(|_| {
[INFO] [stderr] ...   |
[INFO] [stderr] 367 | |                 .collect();
[INFO] [stderr] 368 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/ebrcell.rs:334:9
[INFO] [stderr]     |
[INFO] [stderr] 334 | /         scope(|scope| {
[INFO] [stderr] 335 | |             let cc_ref = &cc;
[INFO] [stderr] 336 | |
[INFO] [stderr] 337 | |             let _readers: Vec<_> = (0..7)
[INFO] [stderr] ...   |
[INFO] [stderr] 368 | |                 .collect();
[INFO] [stderr] 369 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/ebrcell.rs:410:9
[INFO] [stderr]     |
[INFO] [stderr] 410 | /         scope(|scope| {
[INFO] [stderr] 411 | |             let cc_ref = &cc;
[INFO] [stderr] 412 | |             let _writers: Vec<_> = (0..3)
[INFO] [stderr] 413 | |                 .map(|_| {
[INFO] [stderr] ...   |
[INFO] [stderr] 418 | |                 .collect();
[INFO] [stderr] 419 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lincowcell.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 | /         scope(|scope| {
[INFO] [stderr] 205 | |             let cc_ref = &cc;
[INFO] [stderr] 206 | |
[INFO] [stderr] 207 | |             let _readers: Vec<_> = (0..7)
[INFO] [stderr] ...   |
[INFO] [stderr] 221 | |                 .collect();
[INFO] [stderr] 222 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lincowcell.rs:263:9
[INFO] [stderr]     |
[INFO] [stderr] 263 | /         scope(|scope| {
[INFO] [stderr] 264 | |             let cc_ref = &cc;
[INFO] [stderr] 265 | |             let _writers: Vec<_> = (0..3)
[INFO] [stderr] 266 | |                 .map(|_| {
[INFO] [stderr] ...   |
[INFO] [stderr] 271 | |                 .collect();
[INFO] [stderr] 272 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.90s
[INFO] running `"docker" "inspect" "a1d788331f1e6bd37501a0f74ded82ebde98b8ebc73f3dcc534c8c2a683d9b98"`
[INFO] running `"docker" "rm" "-f" "a1d788331f1e6bd37501a0f74ded82ebde98b8ebc73f3dcc534c8c2a683d9b98"`
[INFO] [stdout] a1d788331f1e6bd37501a0f74ded82ebde98b8ebc73f3dcc534c8c2a683d9b98
