[INFO] crate mongo_rub 0.0.2 is already in cache
[INFO] extracting crate mongo_rub 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/mongo_rub/0.0.2
[INFO] extracting crate mongo_rub 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mongo_rub/0.0.2
[INFO] validating manifest of mongo_rub-0.0.2 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 mongo_rub-0.0.2 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 mongo_rub-0.0.2
[INFO] finished frobbing mongo_rub-0.0.2
[INFO] frobbed toml for mongo_rub-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/mongo_rub/0.0.2/Cargo.toml
[INFO] started frobbing mongo_rub-0.0.2
[INFO] finished frobbing mongo_rub-0.0.2
[INFO] frobbed toml for mongo_rub-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mongo_rub/0.0.2/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 mongo_rub-0.0.2 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/mongo_rub/0.0.2:/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] 4fb890b1f473e5f7f8fcbd6a96c523495db30ea890f720d1cdc9cf187f7dc244
[INFO] running `"docker" "start" "-a" "4fb890b1f473e5f7f8fcbd6a96c523495db30ea890f720d1cdc9cf187f7dc244"`
[INFO] [stderr]    Compiling commandext v0.1.0
[INFO] [stderr]    Compiling buildable v0.0.5
[INFO] [stderr]    Compiling mongo_rub v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unstable`
[INFO] [stderr]  --> build.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![allow(unstable)]
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: non-builtin inner attributes are unstable
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![experimental]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/54726
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![experimental]
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::io::File`
[INFO] [stderr]  --> build.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^ no `File` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::io::process`
[INFO] [stderr]  --> build.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::process::Command;
[INFO] [stderr]   |              ^^^^^^^ could not find `process` in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Path`
[INFO] [stderr]   --> build.rs:58:15
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let dst = Path::new(os::getenv("OUT_DIR").unwrap());
[INFO] [stderr]    |               ^^^^ use of undeclared type or module `Path`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `getenv` in module `os`
[INFO] [stderr]   --> build.rs:58:29
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let dst = Path::new(os::getenv("OUT_DIR").unwrap());
[INFO] [stderr]    |                             ^^^^^^ not found in `os`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `std::string::String` in the current scope
[INFO] [stderr]   --> build.rs:60:25
[INFO] [stderr]    |
[INFO] [stderr] 60 |     f.write_str(version.as_slice()).unwrap();
[INFO] [stderr]    |                         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0432, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `mongo_rub`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:20:3
[INFO] [stderr]    |
[INFO] [stderr] 20 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:196:3
[INFO] [stderr]     |
[INFO] [stderr] 196 | #[experimental]
[INFO] [stderr]     |   ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/29642
[INFO] [stderr] 
[INFO] [stderr] error: cannot find derive macro `Show` in this scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:214:47
[INFO] [stderr]     |
[INFO] [stderr] 214 | #[derive(Copy,PartialEq, Eq, PartialOrd, Ord, Show)]
[INFO] [stderr]     |                                               ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Path`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:45:28
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 let path = Path::new(home);
[INFO] [stderr]    |                            ^^^^ use of undeclared type or module `Path`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Path` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |     dir: Option<Path>,
[INFO] [stderr]    |                 ^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::path::Path;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `getenv` in module `std::os`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:41:43
[INFO] [stderr]    |
[INFO] [stderr] 41 |                 let home = match std::os::getenv("HOME") {
[INFO] [stderr]    |                                           ^^^^^^ not found in `std::os`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Path` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:69:32
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn dir(&mut self, dir: Path) -> &mut BuildConfig {
[INFO] [stderr]    |                                ^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::path::Path;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Path` in this scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:155:41
[INFO] [stderr]     |
[INFO] [stderr] 155 |     pub fn get_dir<'a>(&'a self) -> &'a Path {
[INFO] [stderr]     |                                         ^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]     |
[INFO] [stderr] 13  | use std::path::Path;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `LifeCycle: std::clone::Clone` is not satisfied
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/buildable-0.0.5/src/lib.rs:214:10
[INFO] [stderr]     |
[INFO] [stderr] 214 | #[derive(Copy,PartialEq, Eq, PartialOrd, Ord, Show)]
[INFO] [stderr]     |          ^^^^ the trait `std::clone::Clone` is not implemented for `LifeCycle`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 11 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0412, E0425, E0433, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `buildable`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4fb890b1f473e5f7f8fcbd6a96c523495db30ea890f720d1cdc9cf187f7dc244"`
[INFO] running `"docker" "rm" "-f" "4fb890b1f473e5f7f8fcbd6a96c523495db30ea890f720d1cdc9cf187f7dc244"`
[INFO] [stdout] 4fb890b1f473e5f7f8fcbd6a96c523495db30ea890f720d1cdc9cf187f7dc244