[INFO] crate const-concat 0.1.0 is already in cache
[INFO] extracting crate const-concat 0.1.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/const-concat/0.1.0
[INFO] extracting crate const-concat 0.1.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/const-concat/0.1.0
[INFO] validating manifest of const-concat-0.1.0 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of const-concat-0.1.0 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing const-concat-0.1.0
[INFO] finished frobbing const-concat-0.1.0
[INFO] frobbed toml for const-concat-0.1.0 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/const-concat/0.1.0/Cargo.toml
[INFO] started frobbing const-concat-0.1.0
[INFO] finished frobbing const-concat-0.1.0
[INFO] frobbed toml for const-concat-0.1.0 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/const-concat/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking const-concat-0.1.0 against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-2/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/const-concat/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=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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7f9089503ac3eb9c08b345368ceedb0083cc60c8917c808c8a2b3ad5f9bbed1d
[INFO] running `"docker" "start" "-a" "7f9089503ac3eb9c08b345368ceedb0083cc60c8917c808c8a2b3ad5f9bbed1d"`
[INFO] [stderr]     Checking const-concat v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: unions in const fn are unstable
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Transmute { from }.to
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/51909
[INFO] [stderr]    = help: add `#![feature(const_fn_union)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `const-concat`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: unions in const fn are unstable
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Transmute { from }.to
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/51909
[INFO] [stderr]    = help: add `#![feature(const_fn_union)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0080]: evaluation of constant value failed
[INFO] [stderr]   --> src/lib.rs:44:27
[INFO] [stderr]    |
[INFO] [stderr] 44 |         const_concat!($a, TAIL)
[INFO] [stderr]    |                           ^^^^ referenced constant has errors
[INFO] [stderr] ...
[INFO] [stderr] 57 |         const GREETING: &str = const_concat!(SALUTATION, ", ", TARGET, "!");
[INFO] [stderr]    |                                -------------------------------------------- in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0080, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0080`.
[INFO] [stderr] error: Could not compile `const-concat`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7f9089503ac3eb9c08b345368ceedb0083cc60c8917c808c8a2b3ad5f9bbed1d"`
[INFO] running `"docker" "rm" "-f" "7f9089503ac3eb9c08b345368ceedb0083cc60c8917c808c8a2b3ad5f9bbed1d"`
[INFO] [stdout] 7f9089503ac3eb9c08b345368ceedb0083cc60c8917c808c8a2b3ad5f9bbed1d