[INFO] crate mod_path 0.1.6 is already in cache
[INFO] extracting crate mod_path 0.1.6 into work/ex/beta-1.37-6/sources/1.36.0/reg/mod_path/0.1.6
[INFO] extracting crate mod_path 0.1.6 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mod_path/0.1.6
[INFO] validating manifest of mod_path-0.1.6 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mod_path-0.1.6 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mod_path-0.1.6
[INFO] finished frobbing mod_path-0.1.6
[INFO] frobbed toml for mod_path-0.1.6 written to work/ex/beta-1.37-6/sources/1.36.0/reg/mod_path/0.1.6/Cargo.toml
[INFO] started frobbing mod_path-0.1.6
[INFO] finished frobbing mod_path-0.1.6
[INFO] frobbed toml for mod_path-0.1.6 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mod_path/0.1.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mod_path-0.1.6 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/mod_path/0.1.6:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] ae719afd345d07cd04bdfecef5c4a7e5b39756b2a0797cbad1b55f05defb4dd7
[INFO] running `"docker" "start" "-a" "ae719afd345d07cd04bdfecef5c4a7e5b39756b2a0797cbad1b55f05defb4dd7"`
[INFO] [stderr]    Compiling mod_path v0.1.6 (/opt/crater/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> lib.rs:1:30
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, quote, rustc_private)]
[INFO] [stderr]   |                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::codemap`
[INFO] [stderr]  --> lib.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 | use syntax::codemap::Span;
[INFO] [stderr]   |             ^^^^^^^ could not find `codemap` in `syntax`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::ast::TokenTree`
[INFO] [stderr]  --> lib.rs:9:19
[INFO] [stderr]   |
[INFO] [stderr] 9 | use syntax::ast::{TokenTree, Ident};
[INFO] [stderr]   |                   ^^^^^^^^^ no `TokenTree` in `ast`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `syntax::util::small_vector`
[INFO] [stderr]   --> lib.rs:11:19
[INFO] [stderr]    |
[INFO] [stderr] 11 | use syntax::util::small_vector::SmallVector;
[INFO] [stderr]    |                   ^^^^^^^^^^^^ could not find `small_vector` in `util`
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `quote_item!` in this scope
[INFO] [stderr]   --> lib.rs:22:38
[INFO] [stderr]    |
[INFO] [stderr] 22 |     MacEager::items(SmallVector::one(quote_item!(cx,
[INFO] [stderr]    |                                      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `intern` in module `token`
[INFO] [stderr]   --> lib.rs:32:42
[INFO] [stderr]    |
[INFO] [stderr] 32 |     reg.register_syntax_extension(token::intern("mod_path"), IdentTT(Box::new(expand_mod_path), None, false));
[INFO] [stderr]    |                                          ^^^^^^ not found in `token`
[INFO] [stderr] 
[INFO] [stderr] error[E0423]: expected function, found struct variant `IdentTT`
[INFO] [stderr]   --> lib.rs:32:62
[INFO] [stderr]    |
[INFO] [stderr] 32 |     reg.register_syntax_extension(token::intern("mod_path"), IdentTT(Box::new(expand_mod_path), None, false));
[INFO] [stderr]    |                                                              ^^^^^^^ did you mean `IdentTT { /* fields */ }`?
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(plugin_registrar, quote, rustc_private)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0423, E0425, E0432, E0554, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0423`.
[INFO] [stderr] error: Could not compile `mod_path`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ae719afd345d07cd04bdfecef5c4a7e5b39756b2a0797cbad1b55f05defb4dd7"`
[INFO] running `"docker" "rm" "-f" "ae719afd345d07cd04bdfecef5c4a7e5b39756b2a0797cbad1b55f05defb4dd7"`
[INFO] [stdout] ae719afd345d07cd04bdfecef5c4a7e5b39756b2a0797cbad1b55f05defb4dd7