[INFO] crate idl-gen 0.1.0 is already in cache
[INFO] extracting crate idl-gen 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/idl-gen/0.1.0
[INFO] extracting crate idl-gen 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/idl-gen/0.1.0
[INFO] validating manifest of idl-gen-0.1.0 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 idl-gen-0.1.0 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 idl-gen-0.1.0
[INFO] finished frobbing idl-gen-0.1.0
[INFO] frobbed toml for idl-gen-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/idl-gen/0.1.0/Cargo.toml
[INFO] started frobbing idl-gen-0.1.0
[INFO] finished frobbing idl-gen-0.1.0
[INFO] frobbed toml for idl-gen-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/idl-gen/0.1.0/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 idl-gen-0.1.0 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-5/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/idl-gen/0.1.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0b251d907d6d1e61dae3817154014e70877bfe5bfc0bdd2f8e11bd1c793e63c1
[INFO] running `"docker" "start" "-a" "0b251d907d6d1e61dae3817154014e70877bfe5bfc0bdd2f8e11bd1c793e63c1"`
[INFO] [stderr]    Compiling idl-gen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(box_syntax, rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]   --> src/visitor.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |     tcx: TyCtxt<'a, 'gcx, 'tcx>,
[INFO] [stderr]    |                     ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]    --> src/visitor.rs:123:21
[INFO] [stderr]     |
[INFO] [stderr] 123 |     tcx: TyCtxt<'a, 'gcx, 'tcx>,
[INFO] [stderr]     |                     ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]    --> src/visitor.rs:184:21
[INFO] [stderr]     |
[INFO] [stderr] 184 |     tcx: TyCtxt<'a, 'gcx, 'tcx>,
[INFO] [stderr]     |                     ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]   --> src/visitor.rs:80:32
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn new(tcx: TyCtxt<'a, 'gcx, 'tcx>, service_name: Symbol) -> Self {
[INFO] [stderr]    |                                ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]    |                                |
[INFO] [stderr]    |                                unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]    --> src/visitor.rs:128:32
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn new(tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Self {
[INFO] [stderr]     |                                ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error[E0107]: wrong number of lifetime arguments: expected 1, found 3
[INFO] [stderr]    --> src/visitor.rs:189:32
[INFO] [stderr]     |
[INFO] [stderr] 189 |     pub fn new(tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Self {
[INFO] [stderr]     |                                ^^^^  ^^^^ unexpected lifetime argument
[INFO] [stderr]     |                                |
[INFO] [stderr]     |                                unexpected lifetime argument
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0107, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0107`.
[INFO] [stderr] error: Could not compile `idl-gen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0b251d907d6d1e61dae3817154014e70877bfe5bfc0bdd2f8e11bd1c793e63c1"`
[INFO] running `"docker" "rm" "-f" "0b251d907d6d1e61dae3817154014e70877bfe5bfc0bdd2f8e11bd1c793e63c1"`
[INFO] [stdout] 0b251d907d6d1e61dae3817154014e70877bfe5bfc0bdd2f8e11bd1c793e63c1