[INFO] fetching crate rust_cache 0.3.0...
[INFO] testing rust_cache-0.3.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate rust_cache 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rust_cache 0.3.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_cache 0.3.0
[INFO] finished tweaking crates.io crate rust_cache 0.3.0
[INFO] tweaked toml for crates.io crate rust_cache 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "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" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5673bf6d5cf7b4f1d2f81e650695870188a9bcf7f916f03e7aee02bf7eddc32
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d5673bf6d5cf7b4f1d2f81e650695870188a9bcf7f916f03e7aee02bf7eddc32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5673bf6d5cf7b4f1d2f81e650695870188a9bcf7f916f03e7aee02bf7eddc32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5673bf6d5cf7b4f1d2f81e650695870188a9bcf7f916f03e7aee02bf7eddc32", kill_on_drop: false }`
[INFO] [stdout] d5673bf6d5cf7b4f1d2f81e650695870188a9bcf7f916f03e7aee02bf7eddc32
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87127323f080c0003a6b59ea4cd6d5d0f4cb88fbf3fb67972e7cb0fe72612124
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "87127323f080c0003a6b59ea4cd6d5d0f4cb88fbf3fb67972e7cb0fe72612124", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_cache v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |             string: try!(data.get(2).ok_or(ParseCacheEntryError::NotEnoughParts)).to_string(),
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 try!(i64::from_str(data[0])),
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 try!(i32::from_str(data[1]))
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 Some(try!(T::from_cache(&entry.string).map_err(|e| Error::CacheSerializationFailure(Box::new(e)))))
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |             CacheEntry::new(try!(item.to_cache().map_err(|e| Error::CacheSerializationFailure(Box::new(e)))), ttl)
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `now`
[INFO] [stdout]  --> src/common.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use self::time::{Duration, Tm, Timespec, now};
[INFO] [stdout]   |                                          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/hash_map.rs:15:35
[INFO] [stdout]    |
[INFO] [stdout] 15 |     CacheSerializationFailure(Box<Any>)
[INFO] [stdout]    |                                   ^^^ help: use `dyn`: `dyn Any`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "87127323f080c0003a6b59ea4cd6d5d0f4cb88fbf3fb67972e7cb0fe72612124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87127323f080c0003a6b59ea4cd6d5d0f4cb88fbf3fb67972e7cb0fe72612124", kill_on_drop: false }`
[INFO] [stdout] 87127323f080c0003a6b59ea4cd6d5d0f4cb88fbf3fb67972e7cb0fe72612124
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47d38b9a2aad15ae37cf28cad28dc567e24ccdfd8bda36a242c0d282d18522e1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "47d38b9a2aad15ae37cf28cad28dc567e24ccdfd8bda36a242c0d282d18522e1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |             string: try!(data.get(2).ok_or(ParseCacheEntryError::NotEnoughParts)).to_string(),
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 try!(i64::from_str(data[0])),
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 try!(i32::from_str(data[1]))
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 Some(try!(T::from_cache(&entry.string).map_err(|e| Error::CacheSerializationFailure(Box::new(e)))))
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |             CacheEntry::new(try!(item.to_cache().map_err(|e| Error::CacheSerializationFailure(Box::new(e)))), ttl)
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `now`
[INFO] [stdout]  --> src/common.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use self::time::{Duration, Tm, Timespec, now};
[INFO] [stdout]   |                                          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/hash_map.rs:15:35
[INFO] [stdout]    |
[INFO] [stdout] 15 |     CacheSerializationFailure(Box<Any>)
[INFO] [stdout]    |                                   ^^^ help: use `dyn`: `dyn Any`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_cache v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |             string: try!(data.get(2).ok_or(ParseCacheEntryError::NotEnoughParts)).to_string(),
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 try!(i64::from_str(data[0])),
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/common.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 try!(i32::from_str(data[1]))
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 Some(try!(T::from_cache(&entry.string).map_err(|e| Error::CacheSerializationFailure(Box::new(e)))))
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/hash_map.rs:46:29
[INFO] [stdout]    |
[INFO] [stdout] 46 |             CacheEntry::new(try!(item.to_cache().map_err(|e| Error::CacheSerializationFailure(Box::new(e)))), ttl)
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `now`
[INFO] [stdout]  --> src/common.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use self::time::{Duration, Tm, Timespec, now};
[INFO] [stdout]   |                                          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/hash_map.rs:15:35
[INFO] [stdout]    |
[INFO] [stdout] 15 |     CacheSerializationFailure(Box<Any>)
[INFO] [stdout]    |                                   ^^^ help: use `dyn`: `dyn Any`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "47d38b9a2aad15ae37cf28cad28dc567e24ccdfd8bda36a242c0d282d18522e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d38b9a2aad15ae37cf28cad28dc567e24ccdfd8bda36a242c0d282d18522e1", kill_on_drop: false }`
[INFO] [stdout] 47d38b9a2aad15ae37cf28cad28dc567e24ccdfd8bda36a242c0d282d18522e1
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9de7fe5885636a1827e85df7f9f9c964c8cb6a3e32c11c85199f00778cd8164d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9de7fe5885636a1827e85df7f9f9c964c8cb6a3e32c11c85199f00778cd8164d", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:70:21
[INFO] [stderr]    |
[INFO] [stderr] 70 |             string: try!(data.get(2).ok_or(ParseCacheEntryError::NotEnoughParts)).to_string(),
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 try!(i64::from_str(data[0])),
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |                 try!(i32::from_str(data[1]))
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/hash_map.rs:36:22
[INFO] [stderr]    |
[INFO] [stderr] 36 |                 Some(try!(T::from_cache(&entry.string).map_err(|e| Error::CacheSerializationFailure(Box::new(e)))))
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/hash_map.rs:46:29
[INFO] [stderr]    |
[INFO] [stderr] 46 |             CacheEntry::new(try!(item.to_cache().map_err(|e| Error::CacheSerializationFailure(Box::new(e)))), ttl)
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `now`
[INFO] [stderr]  --> src/common.rs:2:42
[INFO] [stderr]   |
[INFO] [stderr] 2 | use self::time::{Duration, Tm, Timespec, now};
[INFO] [stderr]   |                                          ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/hash_map.rs:15:35
[INFO] [stderr]    |
[INFO] [stderr] 15 |     CacheSerializationFailure(Box<Any>)
[INFO] [stderr]    |                                   ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:70:21
[INFO] [stderr]    |
[INFO] [stderr] 70 |             string: try!(data.get(2).ok_or(ParseCacheEntryError::NotEnoughParts)).to_string(),
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 try!(i64::from_str(data[0])),
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/common.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |                 try!(i32::from_str(data[1]))
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/hash_map.rs:36:22
[INFO] [stderr]    |
[INFO] [stderr] 36 |                 Some(try!(T::from_cache(&entry.string).map_err(|e| Error::CacheSerializationFailure(Box::new(e)))))
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/hash_map.rs:46:29
[INFO] [stderr]    |
[INFO] [stderr] 46 |             CacheEntry::new(try!(item.to_cache().map_err(|e| Error::CacheSerializationFailure(Box::new(e)))), ttl)
[INFO] [stderr]    |                             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `now`
[INFO] [stderr]  --> src/common.rs:2:42
[INFO] [stderr]   |
[INFO] [stderr] 2 | use self::time::{Duration, Tm, Timespec, now};
[INFO] [stderr]   |                                          ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/hash_map.rs:15:35
[INFO] [stderr]    |
[INFO] [stderr] 15 |     CacheSerializationFailure(Box<Any>)
[INFO] [stderr]    |                                   ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_cache-9a5d69dd9dfab42d
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test hash_map::test::string_hash_map ... ok
[INFO] [stdout] test common::test::null_cache ... ok
[INFO] [stdout] test common::test::cache_entry_string_conversion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_cache
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9de7fe5885636a1827e85df7f9f9c964c8cb6a3e32c11c85199f00778cd8164d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9de7fe5885636a1827e85df7f9f9c964c8cb6a3e32c11c85199f00778cd8164d", kill_on_drop: false }`
[INFO] [stdout] 9de7fe5885636a1827e85df7f9f9c964c8cb6a3e32c11c85199f00778cd8164d
