[INFO] crate arsert_impl 0.0.2 is already in cache
[INFO] extracting crate arsert_impl 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/arsert_impl/0.0.2
[INFO] extracting crate arsert_impl 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arsert_impl/0.0.2
[INFO] validating manifest of arsert_impl-0.0.2 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 arsert_impl-0.0.2 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 arsert_impl-0.0.2
[INFO] finished frobbing arsert_impl-0.0.2
[INFO] frobbed toml for arsert_impl-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/arsert_impl/0.0.2/Cargo.toml
[INFO] started frobbing arsert_impl-0.0.2
[INFO] finished frobbing arsert_impl-0.0.2
[INFO] frobbed toml for arsert_impl-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arsert_impl/0.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 arsert_impl-0.0.2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arsert_impl/0.0.2:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f6d86026b90da1a9df4b761ddda0257a6e6c861f2856d1009486c852a193a4bc
[INFO] running `"docker" "start" "-a" "f6d86026b90da1a9df4b761ddda0257a6e6c861f2856d1009486c852a193a4bc"`
[INFO] [stderr]    Compiling arsert_failure v0.0.2
[INFO] [stderr]    Compiling arsert_impl v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/lib.rs:7:68
[INFO] [stderr]   |
[INFO] [stderr] 7 | use syn::{self, parenthesized, parse_macro_input, Attribute, Expr, ExprPath, Result, Token};
[INFO] [stderr]   |                                                                    ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/expressions.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use syn::{Expr, ExprPath, Result};
[INFO] [stderr]   |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/binary.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/simple.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/expressions/simple.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use syn::{Expr, ExprPath};
[INFO] [stderr]   |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/unary.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.34s
[INFO] running `"docker" "inspect" "f6d86026b90da1a9df4b761ddda0257a6e6c861f2856d1009486c852a193a4bc"`
[INFO] running `"docker" "rm" "-f" "f6d86026b90da1a9df4b761ddda0257a6e6c861f2856d1009486c852a193a4bc"`
[INFO] [stdout] f6d86026b90da1a9df4b761ddda0257a6e6c861f2856d1009486c852a193a4bc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arsert_impl/0.0.2:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1ab460429bbca73d51fa179c67a0b53b8b9e3e3127a40555f266c704a2aa8a45
[INFO] running `"docker" "start" "-a" "1ab460429bbca73d51fa179c67a0b53b8b9e3e3127a40555f266c704a2aa8a45"`
[INFO] [stderr]    Compiling arsert_impl v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/lib.rs:7:68
[INFO] [stderr]   |
[INFO] [stderr] 7 | use syn::{self, parenthesized, parse_macro_input, Attribute, Expr, ExprPath, Result, Token};
[INFO] [stderr]   |                                                                    ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/expressions.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use syn::{Expr, ExprPath, Result};
[INFO] [stderr]   |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/binary.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/simple.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExprPath`
[INFO] [stderr]  --> src/expressions/simple.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 | use syn::{Expr, ExprPath};
[INFO] [stderr]   |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `proc_macro2`
[INFO] [stderr]  --> src/expressions/unary.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use proc_macro2;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "1ab460429bbca73d51fa179c67a0b53b8b9e3e3127a40555f266c704a2aa8a45"`
[INFO] running `"docker" "rm" "-f" "1ab460429bbca73d51fa179c67a0b53b8b9e3e3127a40555f266c704a2aa8a45"`
[INFO] [stdout] 1ab460429bbca73d51fa179c67a0b53b8b9e3e3127a40555f266c704a2aa8a45
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arsert_impl/0.0.2:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 6b4ba3820d2384f353e8d571a2d561a7e2ae1bd56d46898d2fdc8748bc51bca5
[INFO] running `"docker" "start" "-a" "6b4ba3820d2384f353e8d571a2d561a7e2ae1bd56d46898d2fdc8748bc51bca5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arsert_impl-51f08b2e33d76f39
[INFO] [stderr]    Doc-tests arsert_impl
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6b4ba3820d2384f353e8d571a2d561a7e2ae1bd56d46898d2fdc8748bc51bca5"`
[INFO] running `"docker" "rm" "-f" "6b4ba3820d2384f353e8d571a2d561a7e2ae1bd56d46898d2fdc8748bc51bca5"`
[INFO] [stdout] 6b4ba3820d2384f353e8d571a2d561a7e2ae1bd56d46898d2fdc8748bc51bca5