[INFO] crate nv-xml 0.1.3 is already in cache
[INFO] extracting crate nv-xml 0.1.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/nv-xml/0.1.3
[INFO] extracting crate nv-xml 0.1.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nv-xml/0.1.3
[INFO] validating manifest of nv-xml-0.1.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nv-xml-0.1.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nv-xml-0.1.3
[INFO] finished frobbing nv-xml-0.1.3
[INFO] frobbed toml for nv-xml-0.1.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/nv-xml/0.1.3/Cargo.toml
[INFO] started frobbing nv-xml-0.1.3
[INFO] finished frobbing nv-xml-0.1.3
[INFO] frobbed toml for nv-xml-0.1.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nv-xml/0.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nv-xml-0.1.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nv-xml/0.1.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] d5e4b22c592b0a3dd80bd68fea07f93884509f569be4668fc489c52d9cc524b5
[INFO] running `"docker" "start" "-a" "d5e4b22c592b0a3dd80bd68fea07f93884509f569be4668fc489c52d9cc524b5"`
[INFO] [stderr]    Compiling xml-rs v0.4.1
[INFO] [stderr]    Compiling nv-xml v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/xml_parser.rs:40:33
[INFO] [stderr]    |
[INFO] [stderr] 40 |                             let mut parent = builders.last_mut().unwrap();
[INFO] [stderr]    |                                 ----^^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `"docker" "inspect" "d5e4b22c592b0a3dd80bd68fea07f93884509f569be4668fc489c52d9cc524b5"`
[INFO] running `"docker" "rm" "-f" "d5e4b22c592b0a3dd80bd68fea07f93884509f569be4668fc489c52d9cc524b5"`
[INFO] [stdout] d5e4b22c592b0a3dd80bd68fea07f93884509f569be4668fc489c52d9cc524b5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nv-xml/0.1.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9b3cf3dda67e602d78188f5988529c7b9cb422644b672dd74f58ab24dd8f56cf
[INFO] running `"docker" "start" "-a" "9b3cf3dda67e602d78188f5988529c7b9cb422644b672dd74f58ab24dd8f56cf"`
[INFO] [stderr]    Compiling nv-xml v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/xml_parser.rs:40:33
[INFO] [stderr]    |
[INFO] [stderr] 40 |                             let mut parent = builders.last_mut().unwrap();
[INFO] [stderr]    |                                 ----^^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "9b3cf3dda67e602d78188f5988529c7b9cb422644b672dd74f58ab24dd8f56cf"`
[INFO] running `"docker" "rm" "-f" "9b3cf3dda67e602d78188f5988529c7b9cb422644b672dd74f58ab24dd8f56cf"`
[INFO] [stdout] 9b3cf3dda67e602d78188f5988529c7b9cb422644b672dd74f58ab24dd8f56cf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/nv-xml/0.1.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] d59a2e8cd2922646d8696f6f395803128a05809416d35d62c4587aab3a14a7fc
[INFO] running `"docker" "start" "-a" "d59a2e8cd2922646d8696f6f395803128a05809416d35d62c4587aab3a14a7fc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nv_xml-38c6bd1063d2bfc7
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test xml_element::xml_element_tests::attributes_have_names ... ok
[INFO] [stdout] test xml_element::xml_element_tests::attributes_have_values ... ok
[INFO] [stdout] test xml_attribute::xml_attribute_tests::to_string_test ... ok
[INFO] [stdout] test xml_element::xml_element_tests::can_get_attributes_value_from_key ... ok
[INFO] [stdout] test xml_element::xml_element_tests::can_create_an_element ... ok
[INFO] [stdout] test xml_element::xml_element_tests::can_get_attributes_by_name ... ok
[INFO] [stdout] test xml_element::xml_element_tests::change_name_test ... ok
[INFO] [stdout] test xml_element::xml_element_tests::to_string_children_test ... ok
[INFO] [stdout] test xml_element::xml_element_tests::to_string_children_with_attributes_test ... ok
[INFO] [stdout] test xml_element::xml_element_tests::to_string_no_children_test ... ok
[INFO] [stdout] test xml_element::xml_element_tests::parse_can_fail ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::can_parse ... ok
[INFO] [stdout] test xml_element::xml_element_tests::mutating_name_change_test ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::can_parse_loads_of_nesting ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::bad_xml_test ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::correct_number_of_elements_test ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::can_parse_nesting ... ok
[INFO] [stdout] test xml_parser::xml_parser_tests::can_parse_content ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nv-xml
[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 `"docker" "inspect" "d59a2e8cd2922646d8696f6f395803128a05809416d35d62c4587aab3a14a7fc"`
[INFO] running `"docker" "rm" "-f" "d59a2e8cd2922646d8696f6f395803128a05809416d35d62c4587aab3a14a7fc"`
[INFO] [stdout] d59a2e8cd2922646d8696f6f395803128a05809416d35d62c4587aab3a14a7fc