[INFO] updating cached repository llewekam/ErrorHandlingRust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/llewekam/ErrorHandlingRust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/llewekam/ErrorHandlingRust" "work/ex/beta-1.37-6/sources/1.36.0/gh/llewekam/ErrorHandlingRust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/llewekam/ErrorHandlingRust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/llewekam/ErrorHandlingRust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8e8bcf479df33feccae59cfa488be2186ffb846f
[INFO] sha for GitHub repo llewekam/ErrorHandlingRust: 8e8bcf479df33feccae59cfa488be2186ffb846f
[INFO] validating manifest of llewekam/ErrorHandlingRust 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 llewekam/ErrorHandlingRust 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 llewekam/ErrorHandlingRust
[INFO] finished frobbing llewekam/ErrorHandlingRust
[INFO] frobbed toml for llewekam/ErrorHandlingRust written to work/ex/beta-1.37-6/sources/1.36.0/gh/llewekam/ErrorHandlingRust/Cargo.toml
[INFO] started frobbing llewekam/ErrorHandlingRust
[INFO] finished frobbing llewekam/ErrorHandlingRust
[INFO] frobbed toml for llewekam/ErrorHandlingRust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust/Cargo.toml
[INFO] crate llewekam/ErrorHandlingRust already has a lockfile, it will not be regenerated
[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 llewekam/ErrorHandlingRust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3fee8323d0c3b28789f77c4815734bf67b0b2bad471f7eaa7ad406076bf3abe9
[INFO] running `"docker" "start" "-a" "3fee8323d0c3b28789f77c4815734bf67b0b2bad471f7eaa7ad406076bf3abe9"`
[INFO] [stderr]    Compiling error_handling v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     token::do_token_stuff(&token_string);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `"docker" "inspect" "3fee8323d0c3b28789f77c4815734bf67b0b2bad471f7eaa7ad406076bf3abe9"`
[INFO] running `"docker" "rm" "-f" "3fee8323d0c3b28789f77c4815734bf67b0b2bad471f7eaa7ad406076bf3abe9"`
[INFO] [stdout] 3fee8323d0c3b28789f77c4815734bf67b0b2bad471f7eaa7ad406076bf3abe9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 92ee440f78b45d875f475d5c159f96195580ae5de794f3007fd73fe28d86d533
[INFO] running `"docker" "start" "-a" "92ee440f78b45d875f475d5c159f96195580ae5de794f3007fd73fe28d86d533"`
[INFO] [stderr]    Compiling error_handling v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     token::do_token_stuff(&token_string);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "92ee440f78b45d875f475d5c159f96195580ae5de794f3007fd73fe28d86d533"`
[INFO] running `"docker" "rm" "-f" "92ee440f78b45d875f475d5c159f96195580ae5de794f3007fd73fe28d86d533"`
[INFO] [stdout] 92ee440f78b45d875f475d5c159f96195580ae5de794f3007fd73fe28d86d533
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/llewekam/ErrorHandlingRust:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 42e7810a3a0972c81e468c89d6a8f52dd1b5b7daac1f8dbe0e5d6209fd234bbf
[INFO] running `"docker" "start" "-a" "42e7810a3a0972c81e468c89d6a8f52dd1b5b7daac1f8dbe0e5d6209fd234bbf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/error_handling-b284906fba4cc749
[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] [stderr]      Running /opt/crater/target/debug/deps/error_handling-6828978847ea4f13
[INFO] [stderr]    Doc-tests error_handling
[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" "42e7810a3a0972c81e468c89d6a8f52dd1b5b7daac1f8dbe0e5d6209fd234bbf"`
[INFO] running `"docker" "rm" "-f" "42e7810a3a0972c81e468c89d6a8f52dd1b5b7daac1f8dbe0e5d6209fd234bbf"`
[INFO] [stdout] 42e7810a3a0972c81e468c89d6a8f52dd1b5b7daac1f8dbe0e5d6209fd234bbf