[INFO] crate cargo-sym 0.0.6 is already in cache
[INFO] extracting crate cargo-sym 0.0.6 into work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-sym/0.0.6
[INFO] extracting crate cargo-sym 0.0.6 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cargo-sym/0.0.6
[INFO] validating manifest of cargo-sym-0.0.6 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 cargo-sym-0.0.6 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 cargo-sym-0.0.6
[INFO] finished frobbing cargo-sym-0.0.6
[INFO] frobbed toml for cargo-sym-0.0.6 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-sym/0.0.6/Cargo.toml
[INFO] started frobbing cargo-sym-0.0.6
[INFO] finished frobbing cargo-sym-0.0.6
[INFO] frobbed toml for cargo-sym-0.0.6 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cargo-sym/0.0.6/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 cargo-sym-0.0.6 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-sym/0.0.6:/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] 78abc3885f5c43ba763e28dcc107ba0dd99c994b42c7d13f871ce21bdee45b32
[INFO] running `"docker" "start" "-a" "78abc3885f5c43ba763e28dcc107ba0dd99c994b42c7d13f871ce21bdee45b32"`
[INFO] [stderr]    Compiling scroll v0.3.0
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling capstone-sys v0.2.0
[INFO] [stderr]    Compiling scroll_derive v0.3.0
[INFO] [stderr]    Compiling goblin v0.0.8
[INFO] [stderr]    Compiling capstone3 v0.1.0
[INFO] [stderr]    Compiling cargo-sym v0.0.6 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut hex_buffer = &mut stack_buffer[..column_width * NCOLUMNS];
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:404:9
[INFO] [stderr]     |
[INFO] [stderr] 404 |     let mut bytes = &mut Cursor::new(&buffer);
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.36s
[INFO] running `"docker" "inspect" "78abc3885f5c43ba763e28dcc107ba0dd99c994b42c7d13f871ce21bdee45b32"`
[INFO] running `"docker" "rm" "-f" "78abc3885f5c43ba763e28dcc107ba0dd99c994b42c7d13f871ce21bdee45b32"`
[INFO] [stdout] 78abc3885f5c43ba763e28dcc107ba0dd99c994b42c7d13f871ce21bdee45b32
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-sym/0.0.6:/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] 492d4c4e492d2bbbc1e6050a07262de3f7fa196fbfe0e8d911f8ad3b52614eba
[INFO] running `"docker" "start" "-a" "492d4c4e492d2bbbc1e6050a07262de3f7fa196fbfe0e8d911f8ad3b52614eba"`
[INFO] [stderr]    Compiling cargo-sym v0.0.6 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut hex_buffer = &mut stack_buffer[..column_width * NCOLUMNS];
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:404:9
[INFO] [stderr]     |
[INFO] [stderr] 404 |     let mut bytes = &mut Cursor::new(&buffer);
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `"docker" "inspect" "492d4c4e492d2bbbc1e6050a07262de3f7fa196fbfe0e8d911f8ad3b52614eba"`
[INFO] running `"docker" "rm" "-f" "492d4c4e492d2bbbc1e6050a07262de3f7fa196fbfe0e8d911f8ad3b52614eba"`
[INFO] [stdout] 492d4c4e492d2bbbc1e6050a07262de3f7fa196fbfe0e8d911f8ad3b52614eba
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cargo-sym/0.0.6:/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] e916426b7962752620645809f3ae7d0f1214626296606c7592d8801a72a8c876
[INFO] running `"docker" "start" "-a" "e916426b7962752620645809f3ae7d0f1214626296606c7592d8801a72a8c876"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_sym-1d9d466d2b37bad0
[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" "e916426b7962752620645809f3ae7d0f1214626296606c7592d8801a72a8c876"`
[INFO] running `"docker" "rm" "-f" "e916426b7962752620645809f3ae7d0f1214626296606c7592d8801a72a8c876"`
[INFO] [stdout] e916426b7962752620645809f3ae7d0f1214626296606c7592d8801a72a8c876