[INFO] crate mod_utilities 0.1.0 is already in cache
[INFO] testing mod_utilities-0.1.0 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate mod_utilities 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mod_utilities 0.1.0 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mod_utilities 0.1.0
[INFO] finished tweaking crates.io crate mod_utilities 0.1.0
[INFO] tweaked toml for crates.io crate mod_utilities 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6d6674335cbe17a60ad5880b95f45694a70c4e31a346b2ee86afaaa8b2a51082
[INFO] running `"docker" "start" "-a" "6d6674335cbe17a60ad5880b95f45694a70c4e31a346b2ee86afaaa8b2a51082"`
[INFO] [stderr]    Compiling mod_utilities v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "6d6674335cbe17a60ad5880b95f45694a70c4e31a346b2ee86afaaa8b2a51082"`
[INFO] running `"docker" "rm" "-f" "6d6674335cbe17a60ad5880b95f45694a70c4e31a346b2ee86afaaa8b2a51082"`
[INFO] [stdout] 6d6674335cbe17a60ad5880b95f45694a70c4e31a346b2ee86afaaa8b2a51082
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 80f7e4ffec8bc1826d53da66aafe889bae6258fa400d6feef78dce12f6dc4f7e
[INFO] running `"docker" "start" "-a" "80f7e4ffec8bc1826d53da66aafe889bae6258fa400d6feef78dce12f6dc4f7e"`
[INFO] [stderr]    Compiling mod_utilities v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.29s
[INFO] running `"docker" "inspect" "80f7e4ffec8bc1826d53da66aafe889bae6258fa400d6feef78dce12f6dc4f7e"`
[INFO] running `"docker" "rm" "-f" "80f7e4ffec8bc1826d53da66aafe889bae6258fa400d6feef78dce12f6dc4f7e"`
[INFO] [stdout] 80f7e4ffec8bc1826d53da66aafe889bae6258fa400d6feef78dce12f6dc4f7e
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 853f0a27f000dc37dd6ae732274b77778f77a1996de298f3001f1f2d12e60972
[INFO] running `"docker" "start" "-a" "853f0a27f000dc37dd6ae732274b77778f77a1996de298f3001f1f2d12e60972"`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mod_utilities-93a01abeac3c70e9
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test collections::slot_map::tests::check_slot_map ... ok
[INFO] [stdout] test un_escape_str::test::escape_ok ... ok
[INFO] [stdout] test un_escape_str::test::unescape_ok ... ok
[INFO] [stdout] i'm the child thread
[INFO] [stdout] test temp::test::thread_safe ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mod_utilities
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/unref.rs - unref::Unref (line 6) ... FAILED
[INFO] [stdout] test src/unref.rs - unref::Unref (line 13) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/unref.rs - unref::Unref (line 6) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `mod_engine`
[INFO] [stdout]  --> src/unref.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mod_engine::util::Unref;
[INFO] [stdout]   |     ^^^^^^^^^^ use of undeclared type or module `mod_engine`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unref` found for enum `std::option::Option<&{integer}>` in the current scope
[INFO] [stdout]  --> src/unref.rs:10:14
[INFO] [stdout]   |
[INFO] [stdout] 6 | assert_eq!(x.unref(), Some(y));
[INFO] [stdout]   |              ^^^^^ method not found in `std::option::Option<&{integer}>`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/unref.rs - unref::Unref (line 13) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `mod_engine`
[INFO] [stdout]  --> src/unref.rs:14:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mod_engine::util::Unref;
[INFO] [stdout]   |     ^^^^^^^^^^ use of undeclared type or module `mod_engine`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unref` found for enum `std::option::Option<&i32>` in the current scope
[INFO] [stdout]  --> src/unref.rs:16:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | assert_eq!(z.unref(), None);
[INFO] [stdout]   |              ^^^^^ method not found in `std::option::Option<&i32>`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/unref.rs - unref::Unref (line 13)
[INFO] [stdout]     src/unref.rs - unref::Unref (line 6)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "853f0a27f000dc37dd6ae732274b77778f77a1996de298f3001f1f2d12e60972"`
[INFO] running `"docker" "rm" "-f" "853f0a27f000dc37dd6ae732274b77778f77a1996de298f3001f1f2d12e60972"`
[INFO] [stdout] 853f0a27f000dc37dd6ae732274b77778f77a1996de298f3001f1f2d12e60972