[INFO] crate scdlang_smcat 0.2.1 is already in cache
[INFO] extracting crate scdlang_smcat 0.2.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/scdlang_smcat/0.2.1
[INFO] extracting crate scdlang_smcat 0.2.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/scdlang_smcat/0.2.1
[INFO] validating manifest of scdlang_smcat-0.2.1 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 scdlang_smcat-0.2.1 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 scdlang_smcat-0.2.1
[INFO] finished frobbing scdlang_smcat-0.2.1
[INFO] frobbed toml for scdlang_smcat-0.2.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/scdlang_smcat/0.2.1/Cargo.toml
[INFO] started frobbing scdlang_smcat-0.2.1
[INFO] finished frobbing scdlang_smcat-0.2.1
[INFO] frobbed toml for scdlang_smcat-0.2.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/scdlang_smcat/0.2.1/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing scdlang_smcat-0.2.1 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/scdlang_smcat/0.2.1:/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] afc6199fd4490539ca9ae6dcaf9b79f54a497d90278182896eb219d34370bc54
[INFO] running `"docker" "start" "-a" "afc6199fd4490539ca9ae6dcaf9b79f54a497d90278182896eb219d34370bc54"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling pest v2.1.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling serde_with_macros v1.0.1
[INFO] [stderr]    Compiling scdlang v0.2.1
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling serde_with v1.3.1
[INFO] [stderr]    Compiling scdlang_smcat v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:38:34
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn configure(&mut self) -> &mut Builder<'a> {
[INFO] [stderr]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Builder<'a>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 16s
[INFO] running `"docker" "inspect" "afc6199fd4490539ca9ae6dcaf9b79f54a497d90278182896eb219d34370bc54"`
[INFO] running `"docker" "rm" "-f" "afc6199fd4490539ca9ae6dcaf9b79f54a497d90278182896eb219d34370bc54"`
[INFO] [stdout] afc6199fd4490539ca9ae6dcaf9b79f54a497d90278182896eb219d34370bc54
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/scdlang_smcat/0.2.1:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 88b5691a125f58903db582c70487a9fd3a29237d53329e9b5e778e8d9b14d2f3
[INFO] running `"docker" "start" "-a" "88b5691a125f58903db582c70487a9fd3a29237d53329e9b5e778e8d9b14d2f3"`
[INFO] [stderr]    Compiling assert-json-diff v1.0.0
[INFO] [stderr]    Compiling scdlang_smcat v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:38:34
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn configure(&mut self) -> &mut Builder<'a> {
[INFO] [stderr]    |                                     ^^^^^^^^^^^ help: use `dyn`: `dyn Builder<'a>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.30s
[INFO] running `"docker" "inspect" "88b5691a125f58903db582c70487a9fd3a29237d53329e9b5e778e8d9b14d2f3"`
[INFO] running `"docker" "rm" "-f" "88b5691a125f58903db582c70487a9fd3a29237d53329e9b5e778e8d9b14d2f3"`
[INFO] [stdout] 88b5691a125f58903db582c70487a9fd3a29237d53329e9b5e778e8d9b14d2f3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/scdlang_smcat/0.2.1:/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" "test" "--frozen"`
[INFO] [stdout] 578add9014a549ad6adaa1ebcfcac8c79da5927e64c2dbe08cf0e24fb926b22e
[INFO] running `"docker" "start" "-a" "578add9014a549ad6adaa1ebcfcac8c79da5927e64c2dbe08cf0e24fb926b22e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/scdlang_smcat-16eedfbbe5ab3bb2
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test::clear_cache ... ok
[INFO] [stdout] test test::transient_transition ... ok
[INFO] [stdout] test test::eventful_transition ... ok
[INFO] [stdout] test test::no_clear_cache ... ok
[INFO] [stdout] test test::disable_semantic_error ... ok
[INFO] [stdout] test test::consecutive_insert_parse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests scdlang_smcat
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - Machine (line 20) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Machine (line 20) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `Machine`
[INFO] [stdout]  --> src/lib.rs:21:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | let smcat = Machine::new();
[INFO] [stdout]   |             ^^^^^^^ use of undeclared type or module `Machine`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `parser` in this scope
[INFO] [stdout]  --> src/lib.rs:24:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | parser.parse("A -> B")?;
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `parser` in this scope
[INFO] [stdout]  --> src/lib.rs:26:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | println!("{}", parser.to_string());
[INFO] [stdout]   |                ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]  --> src/lib.rs:24:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | parser.parse("A -> B")?;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]   = note: required by `std::ops::Try::from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Machine (line 20)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "578add9014a549ad6adaa1ebcfcac8c79da5927e64c2dbe08cf0e24fb926b22e"`
[INFO] running `"docker" "rm" "-f" "578add9014a549ad6adaa1ebcfcac8c79da5927e64c2dbe08cf0e24fb926b22e"`
[INFO] [stdout] 578add9014a549ad6adaa1ebcfcac8c79da5927e64c2dbe08cf0e24fb926b22e