[INFO] crate mongodb 0.4.0 is already in cache
[INFO] checking mongodb-0.4.0 against try#e922e6444795ab795fab1943288aee3d543699b8 for pr-66852
[INFO] extracting crate mongodb 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate mongodb 0.4.0 on toolchain e922e6444795ab795fab1943288aee3d543699b8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mongodb 0.4.0
[INFO] finished tweaking crates.io crate mongodb 0.4.0
[INFO] tweaked toml for crates.io crate mongodb 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e922e6444795ab795fab1943288aee3d543699b8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+e922e6444795ab795fab1943288aee3d543699b8" "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] d199be66bbb38eaece75387b4f3c77fb6c6e408b82653b07180c8dde635d180e
[INFO] running `"docker" "start" "-a" "d199be66bbb38eaece75387b4f3c77fb6c6e408b82653b07180c8dde635d180e"`
[INFO] [stderr]     Checking md5 v0.6.1
[INFO] [stderr]     Checking separator v0.4.1
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking textnonce v0.6.5
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking bson v0.14.0
[INFO] [stderr]     Checking mongodb v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/db/mod.rs:152:77
[INFO] [stderr]     |
[INFO] [stderr] 152 |     fn drop_all_users(&self, write_concern: Option<WriteConcern>) -> Result<(i32)>;
[INFO] [stderr]     |                                                                             ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/db/mod.rs:357:77
[INFO] [stderr]     |
[INFO] [stderr] 357 |     fn drop_all_users(&self, write_concern: Option<WriteConcern>) -> Result<(i32)> {
[INFO] [stderr]     |                                                                             ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/db/mod.rs:152:77
[INFO] [stderr]     |
[INFO] [stderr] 152 |     fn drop_all_users(&self, write_concern: Option<WriteConcern>) -> Result<(i32)>;
[INFO] [stderr]     |                                                                             ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/db/mod.rs:357:77
[INFO] [stderr]     |
[INFO] [stderr] 357 |     fn drop_all_users(&self, write_concern: Option<WriteConcern>) -> Result<(i32)> {
[INFO] [stderr]     |                                                                             ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> tests/json/crud/reader.rs:133:20
[INFO] [stderr]     |
[INFO] [stderr] 133 |         let data = try!(get_data(&object));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> tests/json/crud/reader.rs:134:21
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let tests = try!(get_tests(&object));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/sdam/reader.rs:16:37
[INFO] [stderr]    |
[INFO] [stderr] 16 | ...                   try!(Responses::from_json(array)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/sdam/reader.rs:21:35
[INFO] [stderr]    |
[INFO] [stderr] 21 | ...                   try!(Outcome::from_json(obj)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/sdam/reader.rs:82:22
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let phases = try!(get_phases(&object));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/server_selection/reader.rs:71:43
[INFO] [stderr]    |
[INFO] [stderr] 71 | ...                   try!(ReadPreference::from_json(object)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/server_selection/reader.rs:76:44
[INFO] [stderr]    |
[INFO] [stderr] 76 | ...                   try!(get_server_array(array)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/server_selection/reader.rs:81:44
[INFO] [stderr]    |
[INFO] [stderr] 81 | ...                   try!(get_server_array(array)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> tests/json/server_selection/reader.rs:90:39
[INFO] [stderr]    |
[INFO] [stderr] 90 | ...                   try!(get_server_array(array)),
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.01s
[INFO] running `"docker" "inspect" "d199be66bbb38eaece75387b4f3c77fb6c6e408b82653b07180c8dde635d180e"`
[INFO] running `"docker" "rm" "-f" "d199be66bbb38eaece75387b4f3c77fb6c6e408b82653b07180c8dde635d180e"`
[INFO] [stdout] d199be66bbb38eaece75387b4f3c77fb6c6e408b82653b07180c8dde635d180e