[INFO] fetching crate libimagcounter 0.4.0...
[INFO] checking libimagcounter-0.4.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate libimagcounter 0.4.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate libimagcounter 0.4.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate libimagcounter 0.4.0
[INFO] finished tweaking crates.io crate libimagcounter 0.4.0
[INFO] tweaked toml for crates.io crate libimagcounter 0.4.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] a1e8499d640a391fb02db6358ad0f4d667ad1d1173aefe404328bb65de9d6330
[INFO] running `"docker" "start" "-a" "a1e8499d640a391fb02db6358ad0f4d667ad1d1173aefe404328bb65de9d6330"`
[INFO] [stderr]     Checking semver v0.8.0
[INFO] [stderr]     Checking libimagerror v0.4.0
[INFO] [stderr]     Checking libimagutil v0.4.0
[INFO] [stderr]     Checking libimagstore v0.4.0
[INFO] [stderr]     Checking libimagcounter v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/counter.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |             let id = try!(ModuleEntryPath::new(name.clone())
[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]   --> src/counter.rs:74:33
[INFO] [stderr]    |
[INFO] [stderr] 74 |             let mut lockentry = try!(store.create(id).chain_err(|| CEK::StoreWriteError));
[INFO] [stderr]    |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:118:15
[INFO] [stderr]     |
[INFO] [stderr] 118 |         match try!(header.read(&query).chain_err(|| CEK::StoreReadError)) {
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:131:15
[INFO] [stderr]     |
[INFO] [stderr] 131 |         match try!(header.read(&query).chain_err(|| CEK::StoreReadError)) {
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:195:18
[INFO] [stderr]     |
[INFO] [stderr] 195 |         let id = try!(ModuleEntryPath::new(name)
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:203:18
[INFO] [stderr]     |
[INFO] [stderr] 203 |         let id = try!(ModuleEntryPath::new(name)
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] error: the item `DerefMut` is imported redundantly
[INFO] [stderr]   --> src/counter.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 20 | use std::ops::DerefMut;
[INFO] [stderr]    |     ------------------ the item `DerefMut` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 67 |         use std::ops::DerefMut;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     unused_imports,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/counter.rs:71:22
[INFO] [stderr]    |
[INFO] [stderr] 71 |             let id = try!(ModuleEntryPath::new(name.clone())
[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]   --> src/counter.rs:74:33
[INFO] [stderr]    |
[INFO] [stderr] 74 |             let mut lockentry = try!(store.create(id).chain_err(|| CEK::StoreWriteError));
[INFO] [stderr]    |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:118:15
[INFO] [stderr]     |
[INFO] [stderr] 118 |         match try!(header.read(&query).chain_err(|| CEK::StoreReadError)) {
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:131:15
[INFO] [stderr]     |
[INFO] [stderr] 131 |         match try!(header.read(&query).chain_err(|| CEK::StoreReadError)) {
[INFO] [stderr]     |               ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:195:18
[INFO] [stderr]     |
[INFO] [stderr] 195 |         let id = try!(ModuleEntryPath::new(name)
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/counter.rs:203:18
[INFO] [stderr]     |
[INFO] [stderr] 203 |         let id = try!(ModuleEntryPath::new(name)
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] error: the item `DerefMut` is imported redundantly
[INFO] [stderr]   --> src/counter.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 20 | use std::ops::DerefMut;
[INFO] [stderr]    |     ------------------ the item `DerefMut` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 67 |         use std::ops::DerefMut;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     unused_imports,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `libimagcounter`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `libimagcounter`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a1e8499d640a391fb02db6358ad0f4d667ad1d1173aefe404328bb65de9d6330"`
[INFO] running `"docker" "rm" "-f" "a1e8499d640a391fb02db6358ad0f4d667ad1d1173aefe404328bb65de9d6330"`
[INFO] [stdout] a1e8499d640a391fb02db6358ad0f4d667ad1d1173aefe404328bb65de9d6330