[INFO] crate thunk 0.3.0 is already in cache [INFO] extracting crate thunk 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/thunk/0.3.0 [INFO] extracting crate thunk 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/thunk/0.3.0 [INFO] validating manifest of thunk-0.3.0 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 thunk-0.3.0 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 thunk-0.3.0 [INFO] finished frobbing thunk-0.3.0 [INFO] frobbed toml for thunk-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/thunk/0.3.0/Cargo.toml [INFO] started frobbing thunk-0.3.0 [INFO] finished frobbing thunk-0.3.0 [INFO] frobbed toml for thunk-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/thunk/0.3.0/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 thunk-0.3.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/thunk/0.3.0:/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] 3e32dc5f457b7aac818d3c6699a9d6534e8efdf091d40bcebb35af4b66b4fc2d [INFO] running `"docker" "start" "-a" "3e32dc5f457b7aac818d3c6699a9d6534e8efdf091d40bcebb35af4b66b4fc2d"` [INFO] [stderr] Compiling thunk v0.3.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/sync.rs:260:13 [INFO] [stderr] | [INFO] [stderr] 260 | /// If the `AtomicThunk` is evaluated, do nothing. [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] 261 | THUNK_EVALUATED => {} [INFO] [stderr] | --------------------- rustdoc does not generate documentation for match arms [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_doc_comments)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/sync.rs:263:13 [INFO] [stderr] | [INFO] [stderr] 263 | / /// If the `AtomicThunk` is `LOCKING` or `LOCKED`, wait until the thunk is [INFO] [stderr] 264 | | /// done evaluating and then return a reference to the inner value. [INFO] [stderr] | |_______________________________________________________________________________^ [INFO] [stderr] 265 | THUNK_LOCKING | THUNK_LOCKED => unsafe { self.besiege() }, [INFO] [stderr] | --------------------------------------------------------- rustdoc does not generate documentation for match arms [INFO] [stderr] [INFO] [stderr] warning: unused doc comment [INFO] [stderr] --> src/sync.rs:267:13 [INFO] [stderr] | [INFO] [stderr] 267 | / /// Only `THUNK_DEFERRED`, `THUNK_EVALUATED`, `THUNK_LOCKING`, and [INFO] [stderr] 268 | | /// `THUNK_LOCKED` are valid values of the flag. [INFO] [stderr] | |____________________________________________________________^ [INFO] [stderr] 269 | / THUNK_INVALIDATED | [INFO] [stderr] 270 | | _ => unsafe { unreachable() }, [INFO] [stderr] | |_________________________________________- rustdoc does not generate documentation for match arms [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox` [INFO] [stderr] --> src/sync.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::boxed::FnBox; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox` [INFO] [stderr] --> src/unsync.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::boxed::FnBox; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed` [INFO] [stderr] [INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel [INFO] [stderr] --> src/lib.rs:20:1 [INFO] [stderr] | [INFO] [stderr] 20 | #![feature(fnbox)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel [INFO] [stderr] --> src/lib.rs:21:1 [INFO] [stderr] | [INFO] [stderr] 21 | #![feature(untagged_unions)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/sync.rs:222:46 [INFO] [stderr] | [INFO] [stderr] 222 | Box::from_raw(thunk_raw as *mut (FnBox() -> () + 'static)) [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox() -> () + 'static` [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/unsync.rs:157:50 [INFO] [stderr] | [INFO] [stderr] 157 | Box::from_raw(thunk_raw as *mut (FnBox() -> () + 'static)) [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox() -> () + 'static` [INFO] [stderr] [INFO] [stderr] error: aborting due to 4 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0432, E0554. [INFO] [stderr] For more information about an error, try `rustc --explain E0432`. [INFO] [stderr] error: Could not compile `thunk`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "3e32dc5f457b7aac818d3c6699a9d6534e8efdf091d40bcebb35af4b66b4fc2d"` [INFO] running `"docker" "rm" "-f" "3e32dc5f457b7aac818d3c6699a9d6534e8efdf091d40bcebb35af4b66b4fc2d"` [INFO] [stdout] 3e32dc5f457b7aac818d3c6699a9d6534e8efdf091d40bcebb35af4b66b4fc2d