[INFO] updating cached repository jmatta697/matta_bc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jmatta697/matta_bc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jmatta697/matta_bc" "work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jmatta697/matta_bc" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jmatta697/matta_bc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jmatta697/matta_bc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3ead6621c2c413d844175868839063592f32468c
[INFO] sha for GitHub repo jmatta697/matta_bc: 3ead6621c2c413d844175868839063592f32468c
[INFO] validating manifest of jmatta697/matta_bc on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jmatta697/matta_bc on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jmatta697/matta_bc
[INFO] finished frobbing jmatta697/matta_bc
[INFO] frobbed toml for jmatta697/matta_bc written to work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc/Cargo.toml
[INFO] started frobbing jmatta697/matta_bc
[INFO] finished frobbing jmatta697/matta_bc
[INFO] frobbed toml for jmatta697/matta_bc written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jmatta697/matta_bc/Cargo.toml
[INFO] crate jmatta697/matta_bc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jmatta697/matta_bc against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 58097c57e56857a84aefe0cdbe40cef4a17ece91caec83f31e2cb6b4da836335
[INFO] running `"docker" "start" "-a" "58097c57e56857a84aefe0cdbe40cef4a17ece91caec83f31e2cb6b4da836335"`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling matta_bc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `variable_value_str` is never read
[INFO] [stderr]    --> src/main.rs:424:13
[INFO] [stderr]     |
[INFO] [stderr] 424 |     let mut variable_value_str = String::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.59s
[INFO] running `"docker" "inspect" "58097c57e56857a84aefe0cdbe40cef4a17ece91caec83f31e2cb6b4da836335"`
[INFO] running `"docker" "rm" "-f" "58097c57e56857a84aefe0cdbe40cef4a17ece91caec83f31e2cb6b4da836335"`
[INFO] [stdout] 58097c57e56857a84aefe0cdbe40cef4a17ece91caec83f31e2cb6b4da836335
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6d3b1cd9658057a7c2f5c6658d414b8172e640fd0b8f1e193cc07c54e77c1175
[INFO] running `"docker" "start" "-a" "6d3b1cd9658057a7c2f5c6658d414b8172e640fd0b8f1e193cc07c54e77c1175"`
[INFO] [stderr]    Compiling matta_bc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `variable_value_str` is never read
[INFO] [stderr]    --> src/main.rs:424:13
[INFO] [stderr]     |
[INFO] [stderr] 424 |     let mut variable_value_str = String::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `"docker" "inspect" "6d3b1cd9658057a7c2f5c6658d414b8172e640fd0b8f1e193cc07c54e77c1175"`
[INFO] running `"docker" "rm" "-f" "6d3b1cd9658057a7c2f5c6658d414b8172e640fd0b8f1e193cc07c54e77c1175"`
[INFO] [stdout] 6d3b1cd9658057a7c2f5c6658d414b8172e640fd0b8f1e193cc07c54e77c1175
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jmatta697/matta_bc:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 5ce60a798e2f6d403031f95f0edcf7e4863f690d78c749f09481202f6e6a1386
[INFO] running `"docker" "start" "-a" "5ce60a798e2f6d403031f95f0edcf7e4863f690d78c749f09481202f6e6a1386"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/matta_bc-a407f1e6b443492a
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test test_apply_operation ... ok
[INFO] [stdout] test test_check_first_char_in_exp ... ok
[INFO] [stdout] test test_check_expr_syntax ... ok
[INFO] [stdout] test test_evaluate_clean_expression ... ok
[INFO] [stdout] test test_evaluate_comparison_expression ... ok
[INFO] [stdout] test test_count_valid_parentheses ... ok
[INFO] [stdout] test test_check_only_valid_chars ... ok
[INFO] [stdout] test test_check_last_char ... ok
[INFO] [stdout] test test_remove_all_white_space_from_string ... ok
[INFO] [stdout] test test_handle_comparison_expression ... ok
[INFO] [stdout] test test_operator_precedence ... ok
[INFO] [stdout] test test_handle_variable_declaration ... ok
[INFO] [stdout] test test_replace_variable_references_with_value_strings ... ok
[INFO] [stdout] test test_is_a_variable_assignment ... ok
[INFO] [stdout] test test_expression_string_to_vector ... ok
[INFO] [stdout] test test_string_has_comparison ... ok
[INFO] [stdout] test test_get_variable_value ... ok
[INFO] [stdout] test test_valid_expression_str ... ok
[INFO] [stdout] test test_extract_comparison_notation ... ok
[INFO] [stdout] test test_split_comparison_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5ce60a798e2f6d403031f95f0edcf7e4863f690d78c749f09481202f6e6a1386"`
[INFO] running `"docker" "rm" "-f" "5ce60a798e2f6d403031f95f0edcf7e4863f690d78c749f09481202f6e6a1386"`
[INFO] [stdout] 5ce60a798e2f6d403031f95f0edcf7e4863f690d78c749f09481202f6e6a1386