[INFO] crate syn-next 0.15.0-rc4 is already in cache
[INFO] extracting crate syn-next 0.15.0-rc4 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/syn-next/0.15.0-rc4
[INFO] extracting crate syn-next 0.15.0-rc4 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/syn-next/0.15.0-rc4
[INFO] validating manifest of syn-next-0.15.0-rc4 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of syn-next-0.15.0-rc4 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing syn-next-0.15.0-rc4
[INFO] removed 1 missing examples
[INFO] finished frobbing syn-next-0.15.0-rc4
[INFO] frobbed toml for syn-next-0.15.0-rc4 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/syn-next/0.15.0-rc4/Cargo.toml
[INFO] started frobbing syn-next-0.15.0-rc4
[INFO] removed 1 missing examples
[INFO] finished frobbing syn-next-0.15.0-rc4
[INFO] frobbed toml for syn-next-0.15.0-rc4 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/syn-next/0.15.0-rc4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] building syn-next-0.15.0-rc4 against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-6/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/syn-next/0.15.0-rc4:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 77ef22ece8ffc90609e5ccf7c87eae428e658d6b65f20640afa1d6ab7d3e0796
[INFO] running `"docker" "start" "-a" "77ef22ece8ffc90609e5ccf7c87eae428e658d6b65f20640afa1d6ab7d3e0796"`
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling syn-next v0.15.0-rc4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.52s
[INFO] running `"docker" "inspect" "77ef22ece8ffc90609e5ccf7c87eae428e658d6b65f20640afa1d6ab7d3e0796"`
[INFO] running `"docker" "rm" "-f" "77ef22ece8ffc90609e5ccf7c87eae428e658d6b65f20640afa1d6ab7d3e0796"`
[INFO] [stdout] 77ef22ece8ffc90609e5ccf7c87eae428e658d6b65f20640afa1d6ab7d3e0796
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-6/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/syn-next/0.15.0-rc4:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7f0ec9b20f2e778ec6824c1acb8570de8a34c26bd2031f934cc76134e0d922ff
[INFO] running `"docker" "start" "-a" "7f0ec9b20f2e778ec6824c1acb8570de8a34c26bd2031f934cc76134e0d922ff"`
[INFO] [stderr]    Compiling syn-next v0.15.0-rc4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.74s
[INFO] running `"docker" "inspect" "7f0ec9b20f2e778ec6824c1acb8570de8a34c26bd2031f934cc76134e0d922ff"`
[INFO] running `"docker" "rm" "-f" "7f0ec9b20f2e778ec6824c1acb8570de8a34c26bd2031f934cc76134e0d922ff"`
[INFO] [stdout] 7f0ec9b20f2e778ec6824c1acb8570de8a34c26bd2031f934cc76134e0d922ff