[INFO] updating cached repository paavohuhtala/bfcrs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/paavohuhtala/bfcrs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/paavohuhtala/bfcrs" "work/ex/beta-1.38-1/sources/1.37.0/gh/paavohuhtala/bfcrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/paavohuhtala/bfcrs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/paavohuhtala/bfcrs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/paavohuhtala/bfcrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/paavohuhtala/bfcrs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cfa75356188b83ce56b1de13366bd431c304cfa2
[INFO] sha for GitHub repo paavohuhtala/bfcrs: cfa75356188b83ce56b1de13366bd431c304cfa2
[INFO] validating manifest of paavohuhtala/bfcrs 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 paavohuhtala/bfcrs 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 paavohuhtala/bfcrs
[INFO] finished frobbing paavohuhtala/bfcrs
[INFO] frobbed toml for paavohuhtala/bfcrs written to work/ex/beta-1.38-1/sources/1.37.0/gh/paavohuhtala/bfcrs/Cargo.toml
[INFO] started frobbing paavohuhtala/bfcrs
[INFO] finished frobbing paavohuhtala/bfcrs
[INFO] frobbed toml for paavohuhtala/bfcrs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/paavohuhtala/bfcrs/Cargo.toml
[INFO] crate paavohuhtala/bfcrs already has a lockfile, it will not be regenerated
[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 paavohuhtala/bfcrs against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/paavohuhtala/bfcrs:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ae0e85e5421c3e156d34fbc68eefeee9dc02b980560f218e311db287584919e1
[INFO] running `"docker" "start" "-a" "ae0e85e5421c3e156d34fbc68eefeee9dc02b980560f218e311db287584919e1"`
[INFO] [stderr]    Compiling leb128 v0.2.3
[INFO] [stderr]    Compiling bfcrs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:13:45
[INFO] [stderr]    |
[INFO] [stderr] 13 |       (Some(ChangeAddr(a)), [ChangeAddr(b), tail..]) => (Some(ChangeAddr(a + b)), tail),
[INFO] [stderr]    |                                             ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:14:79
[INFO] [stderr]    |
[INFO] [stderr] 14 |       (Some(Offset(offs_a, ChangeValue(a))), [Offset(offs_b, ChangeValue(b)), tail..])
[INFO] [stderr]    |                                                                               ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:21:68
[INFO] [stderr]    |
[INFO] [stderr] 21 |         [Offset(0, ChangeValue(value)), ChangeAddr(addr_offset_b), tail..],
[INFO] [stderr]    |                                                                    ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:38:20
[INFO] [stderr]    |
[INFO] [stderr] 38 |             [head, tail..] => (Some(head.clone()), tail),
[INFO] [stderr]    |                    ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:42:76
[INFO] [stderr]    |
[INFO] [stderr] 42 |       (Some(Offset(offs_a, SetValue(0))), [Offset(offs_b, ChangeValue(a)), tail..])
[INFO] [stderr]    |                                                                            ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:47:73
[INFO] [stderr]    |
[INFO] [stderr] 47 |       (Some(Offset(offs_a, SetValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                         ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:48:78
[INFO] [stderr]    |
[INFO] [stderr] 48 |       | (Some(Offset(offs_a, ChangeValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                              ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |       (Some(ref token), [head, tail..]) => {
[INFO] [stderr]    |                                ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error: `X..` range patterns are not supported
[INFO] [stderr]   --> src/optimizer.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 62 |       (None, [head, tail..]) => (Some(head.clone()), tail),
[INFO] [stderr]    |                     ^^^^^^ help: try using the maximum value for the type: `tail..MAX`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:13:45
[INFO] [stderr]    |
[INFO] [stderr] 13 |       (Some(ChangeAddr(a)), [ChangeAddr(b), tail..]) => (Some(ChangeAddr(a + b)), tail),
[INFO] [stderr]    |                                             ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:13:83
[INFO] [stderr]    |
[INFO] [stderr] 13 |       (Some(ChangeAddr(a)), [ChangeAddr(b), tail..]) => (Some(ChangeAddr(a + b)), tail),
[INFO] [stderr]    |                                                                                   ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:14:79
[INFO] [stderr]    |
[INFO] [stderr] 14 |       (Some(Offset(offs_a, ChangeValue(a))), [Offset(offs_b, ChangeValue(b)), tail..])
[INFO] [stderr]    |                                                                               ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:17:65
[INFO] [stderr]    |
[INFO] [stderr] 17 |         (Some(ProgramToken::offs_change_value(*offs_a, a + b)), tail)
[INFO] [stderr]    |                                                                 ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:21:68
[INFO] [stderr]    |
[INFO] [stderr] 21 |         [Offset(0, ChangeValue(value)), ChangeAddr(addr_offset_b), tail..],
[INFO] [stderr]    |                                                                    ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:27:11
[INFO] [stderr]    |
[INFO] [stderr] 27 |           tail,
[INFO] [stderr]    |           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:38:20
[INFO] [stderr]    |
[INFO] [stderr] 38 |             [head, tail..] => (Some(head.clone()), tail),
[INFO] [stderr]    |                    ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:38:52
[INFO] [stderr]    |
[INFO] [stderr] 38 |             [head, tail..] => (Some(head.clone()), tail),
[INFO] [stderr]    |                                                    ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:42:76
[INFO] [stderr]    |
[INFO] [stderr] 42 |       (Some(Offset(offs_a, SetValue(0))), [Offset(offs_b, ChangeValue(a)), tail..])
[INFO] [stderr]    |                                                                            ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:45:59
[INFO] [stderr]    |
[INFO] [stderr] 45 |         (Some(ProgramToken::offs_set_value(*offs_a, *a)), tail)
[INFO] [stderr]    |                                                           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:47:73
[INFO] [stderr]    |
[INFO] [stderr] 47 |       (Some(Offset(offs_a, SetValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                         ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:48:78
[INFO] [stderr]    |
[INFO] [stderr] 48 |       | (Some(Offset(offs_a, ChangeValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                              ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:51:59
[INFO] [stderr]    |
[INFO] [stderr] 51 |         (Some(ProgramToken::offs_set_value(*offs_a, *a)), tail)
[INFO] [stderr]    |                                                           ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |       (Some(ref token), [head, tail..]) => {
[INFO] [stderr]    |                                ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:60:30
[INFO] [stderr]    |
[INFO] [stderr] 60 |         (Some(head.clone()), tail)
[INFO] [stderr]    |                              ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 62 |       (None, [head, tail..]) => (Some(head.clone()), tail),
[INFO] [stderr]    |                     ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `tail` in this scope
[INFO] [stderr]   --> src/optimizer.rs:62:54
[INFO] [stderr]    |
[INFO] [stderr] 62 |       (None, [head, tail..]) => (Some(head.clone()), tail),
[INFO] [stderr]    |                                                      ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(iterator_find_map)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(iterator_flatten)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:13:45
[INFO] [stderr]    |
[INFO] [stderr] 13 |       (Some(ChangeAddr(a)), [ChangeAddr(b), tail..]) => (Some(ChangeAddr(a + b)), tail),
[INFO] [stderr]    |                                             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:14:79
[INFO] [stderr]    |
[INFO] [stderr] 14 |       (Some(Offset(offs_a, ChangeValue(a))), [Offset(offs_b, ChangeValue(b)), tail..])
[INFO] [stderr]    |                                                                               ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:21:68
[INFO] [stderr]    |
[INFO] [stderr] 21 |         [Offset(0, ChangeValue(value)), ChangeAddr(addr_offset_b), tail..],
[INFO] [stderr]    |                                                                    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:38:20
[INFO] [stderr]    |
[INFO] [stderr] 38 |             [head, tail..] => (Some(head.clone()), tail),
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:42:76
[INFO] [stderr]    |
[INFO] [stderr] 42 |       (Some(Offset(offs_a, SetValue(0))), [Offset(offs_b, ChangeValue(a)), tail..])
[INFO] [stderr]    |                                                                            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:47:73
[INFO] [stderr]    |
[INFO] [stderr] 47 |       (Some(Offset(offs_a, SetValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:48:78
[INFO] [stderr]    |
[INFO] [stderr] 48 |       | (Some(Offset(offs_a, ChangeValue(_))), [Offset(offs_b, SetValue(a)), tail..])
[INFO] [stderr]    |                                                                              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |       (Some(ref token), [head, tail..]) => {
[INFO] [stderr]    |                                ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stderr]   --> src/optimizer.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 62 |       (None, [head, tail..]) => (Some(head.clone()), tail),
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/37854
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/wasm/code_stream.rs:85:66
[INFO] [stderr]    |
[INFO] [stderr] 85 |   pub fn emit_print_string(&mut self, s: &str) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/wasm/code_stream.rs:93:61
[INFO] [stderr]    |
[INFO] [stderr] 93 |   pub fn emit(&mut self, op: Instruction) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/wasm/module_builder.rs:29:56
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub fn add_section(&mut self, id: u8, entries: &[Box<Fn(&mut dyn Write) -> ()>]) {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut dyn Write) -> ()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/wasm/module_builder.rs:40:82
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn write_to_stream(mut self, mut stream: &mut dyn Write) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/wasm/module_builder.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 | ) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/backend/wasm/module_builder.rs:321:23
[INFO] [stderr]     |
[INFO] [stderr] 321 |   ) -> Result<(), Box<Error>> {
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/mod.rs:12:6
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl Backend {
[INFO] [stderr]    |      ^^^^^^^ help: use `dyn`: `dyn Backend`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/backend/mod.rs:13:46
[INFO] [stderr]    |
[INFO] [stderr] 13 |   pub fn from_name(name: &str) -> Option<Box<Backend>> {
[INFO] [stderr]    |                                              ^^^^^^^ help: use `dyn`: `dyn Backend`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 38 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `bfcrs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ae0e85e5421c3e156d34fbc68eefeee9dc02b980560f218e311db287584919e1"`
[INFO] running `"docker" "rm" "-f" "ae0e85e5421c3e156d34fbc68eefeee9dc02b980560f218e311db287584919e1"`
[INFO] [stdout] ae0e85e5421c3e156d34fbc68eefeee9dc02b980560f218e311db287584919e1