[INFO] updating cached repository rmanoka/tygres-macros
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rmanoka/tygres-macros
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rmanoka/tygres-macros" "work/ex/beta-1.38-1/sources/1.37.0/gh/rmanoka/tygres-macros"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rmanoka/tygres-macros'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rmanoka/tygres-macros" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rmanoka/tygres-macros"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rmanoka/tygres-macros'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b22905c0eb1951b2e61297af7ab88fa3d3d417bd
[INFO] sha for GitHub repo rmanoka/tygres-macros: b22905c0eb1951b2e61297af7ab88fa3d3d417bd
[INFO] validating manifest of rmanoka/tygres-macros 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 rmanoka/tygres-macros 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 rmanoka/tygres-macros
[INFO] finished frobbing rmanoka/tygres-macros
[INFO] frobbed toml for rmanoka/tygres-macros written to work/ex/beta-1.38-1/sources/1.37.0/gh/rmanoka/tygres-macros/Cargo.toml
[INFO] started frobbing rmanoka/tygres-macros
[INFO] finished frobbing rmanoka/tygres-macros
[INFO] frobbed toml for rmanoka/tygres-macros written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rmanoka/tygres-macros/Cargo.toml
[INFO] crate rmanoka/tygres-macros already has a lockfile, it will not be regenerated
[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 rmanoka/tygres-macros 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/gh/rmanoka/tygres-macros:/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] 64d58e29baf80bf7c0dca2c4b59a4b8e97b490b80c4a50fd52a4f4fee8f236d8
[INFO] running `"docker" "start" "-a" "64d58e29baf80bf7c0dca2c4b59a4b8e97b490b80c4a50fd52a4f4fee8f236d8"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling Inflector v0.11.3
[INFO] [stderr]    Compiling darling_core v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.8.2
[INFO] [stderr]    Compiling darling v0.8.2
[INFO] [stderr]    Compiling tygres-macros v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_crate_item_prelude, arbitrary_self_types)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `Type`
[INFO] [stderr]  --> src/builder.rs:3:28
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Ident, TypeParamBound, Field, Type,
[INFO] [stderr]   |                            ^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `TypeParamBound`
[INFO] [stderr]    --> src/schema.rs:219:12
[INFO] [stderr]     |
[INFO] [stderr] 219 |     Ident, TypeParamBound, Field, Type,
[INFO] [stderr]     |            ^^^^^^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `token`
[INFO] [stderr]    --> src/setter.rs:228:8
[INFO] [stderr]     |
[INFO] [stderr] 228 |     *, token,
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `token`
[INFO] [stderr]   --> src/getter.rs:91:8
[INFO] [stderr]    |
[INFO] [stderr] 91 |     *, token,
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `punctuated::Punctuated`, `token`
[INFO] [stderr]    --> src/data.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 |     *, token,
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 101 |     punctuated::Punctuated,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/attrs.rs:63:12
[INFO] [stderr]    |
[INFO] [stderr] 63 |         if (path.segments.len() != 1) { return false; }
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TokenStream`
[INFO] [stderr]   --> src/attrs.rs:90:19
[INFO] [stderr]    |
[INFO] [stderr] 90 | use proc_macro2::{TokenStream, Literal};
[INFO] [stderr]    |                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Field`, `TypeParamBound`, `Type`, `token`
[INFO] [stderr]   --> src/attrs.rs:92:15
[INFO] [stderr]    |
[INFO] [stderr] 92 |     *, Ident, TypeParamBound, Field, Type,
[INFO] [stderr]    |               ^^^^^^^^^^^^^^  ^^^^^  ^^^^
[INFO] [stderr] 93 |     punctuated::Punctuated,
[INFO] [stderr] 94 |     token,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `tygres-macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "64d58e29baf80bf7c0dca2c4b59a4b8e97b490b80c4a50fd52a4f4fee8f236d8"`
[INFO] running `"docker" "rm" "-f" "64d58e29baf80bf7c0dca2c4b59a4b8e97b490b80c4a50fd52a4f4fee8f236d8"`
[INFO] [stdout] 64d58e29baf80bf7c0dca2c4b59a4b8e97b490b80c4a50fd52a4f4fee8f236d8