[INFO] crate swc_ecma_codegen 0.3.1 is already in cache
[INFO] extracting crate swc_ecma_codegen 0.3.1 into work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/swc_ecma_codegen/0.3.1
[INFO] extracting crate swc_ecma_codegen 0.3.1 into work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/swc_ecma_codegen/0.3.1
[INFO] validating manifest of swc_ecma_codegen-0.3.1 on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of swc_ecma_codegen-0.3.1 on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing swc_ecma_codegen-0.3.1
[INFO] finished frobbing swc_ecma_codegen-0.3.1
[INFO] frobbed toml for swc_ecma_codegen-0.3.1 written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/swc_ecma_codegen/0.3.1/Cargo.toml
[INFO] started frobbing swc_ecma_codegen-0.3.1
[INFO] finished frobbing swc_ecma_codegen-0.3.1
[INFO] frobbed toml for swc_ecma_codegen-0.3.1 written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/swc_ecma_codegen/0.3.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking swc_ecma_codegen-0.3.1 against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/swc_ecma_codegen/0.3.1:/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=forbid" "-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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e1ba45c91b2178b8ff825de45a6b04d479694912af5d17f665d442aa05941427
[INFO] running `"docker" "start" "-a" "e1ba45c91b2178b8ff825de45a6b04d479694912af5d17f665d442aa05941427"`
[INFO] [stderr]    Compiling rustc-rayon-core v0.1.1
[INFO] [stderr]     Checking rustc-ap-graphviz v297.0.0
[INFO] [stderr]    Compiling rustc-ap-rustc_target v297.0.0
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]    Compiling rustc-ap-syntax v297.0.0
[INFO] [stderr]     Checking if_chain v0.1.3
[INFO] [stderr]     Checking relative-path v0.4.0
[INFO] [stderr]     Checking base64 v0.4.2
[INFO] [stderr]     Checking ena v0.9.3
[INFO] [stderr]     Checking rustc-ap-rustc_cratesio_shim v297.0.0
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling sourcemap v2.2.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]     Checking slog-term v2.4.0
[INFO] [stderr]     Checking rustc-ap-serialize v297.0.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr] error[E0119]: conflicting implementations of trait `serialize::Encodable` for type `std::rc::Rc<_>`:
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-297.0.0/serialize.rs:893:1
[INFO] [stderr]     |
[INFO] [stderr] 589 | impl<T:Encodable> Encodable for Rc<T> {
[INFO] [stderr]     | ------------------------------------- first implementation here
[INFO] [stderr] ...
[INFO] [stderr] 893 | impl<T: ?Sized + UseSpecializedEncodable> Encodable for T {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `std::rc::Rc<_>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: downstream crates may implement trait `serialize::UseSpecializedEncodable` for type `std::rc::Rc<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0119]: conflicting implementations of trait `serialize::Decodable` for type `std::rc::Rc<_>`:
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-297.0.0/serialize.rs:908:1
[INFO] [stderr]     |
[INFO] [stderr] 595 | impl<T:Decodable> Decodable for Rc<T> {
[INFO] [stderr]     | ------------------------------------- first implementation here
[INFO] [stderr] ...
[INFO] [stderr] 908 | impl<T: UseSpecializedDecodable> Decodable for T {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `std::rc::Rc<_>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: downstream crates may implement trait `serialize::UseSpecializedDecodable` for type `std::rc::Rc<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0119`.
[INFO] [stderr] error: Could not compile `rustc-ap-serialize`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e1ba45c91b2178b8ff825de45a6b04d479694912af5d17f665d442aa05941427"`
[INFO] running `"docker" "rm" "-f" "e1ba45c91b2178b8ff825de45a6b04d479694912af5d17f665d442aa05941427"`
[INFO] [stdout] e1ba45c91b2178b8ff825de45a6b04d479694912af5d17f665d442aa05941427