[INFO] updating cached repository l1x/hammer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/l1x/hammer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/l1x/hammer" "work/ex/beta-1.38-1/sources/1.37.0/gh/l1x/hammer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/l1x/hammer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/l1x/hammer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/l1x/hammer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/l1x/hammer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 49c7d20f9a93c734390b335f77e2592979beabed
[INFO] sha for GitHub repo l1x/hammer: 49c7d20f9a93c734390b335f77e2592979beabed
[INFO] validating manifest of l1x/hammer 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 l1x/hammer 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 l1x/hammer
[INFO] finished frobbing l1x/hammer
[INFO] frobbed toml for l1x/hammer written to work/ex/beta-1.38-1/sources/1.37.0/gh/l1x/hammer/Cargo.toml
[INFO] started frobbing l1x/hammer
[INFO] finished frobbing l1x/hammer
[INFO] frobbed toml for l1x/hammer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/l1x/hammer/Cargo.toml
[INFO] crate l1x/hammer 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] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/l1x/hammer/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing l1x/hammer 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/l1x/hammer:/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] 76779e515a89c5c8e0e9ee814a2b7cedf68cff22cbd6201f55256ca1b537444c
[INFO] running `"docker" "start" "-a" "76779e515a89c5c8e0e9ee814a2b7cedf68cff22cbd6201f55256ca1b537444c"`
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling hammer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no method named `read_to_end` found for type `hyper::client::Response` in the current scope
[INFO] [stderr]   --> src/main.rs:26:69
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let res = client.get("http://localhost:8080/hello").send()?.read_to_end();
[INFO] [stderr]    |                                                                     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope, perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 4  | use std::io::Read;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stderr]   --> src/main.rs:26:19
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let res = client.get("http://localhost:8080/hello").send()?.read_to_end();
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stderr]    = note: required by `std::ops::Try::from_error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `hammer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "76779e515a89c5c8e0e9ee814a2b7cedf68cff22cbd6201f55256ca1b537444c"`
[INFO] running `"docker" "rm" "-f" "76779e515a89c5c8e0e9ee814a2b7cedf68cff22cbd6201f55256ca1b537444c"`
[INFO] [stdout] 76779e515a89c5c8e0e9ee814a2b7cedf68cff22cbd6201f55256ca1b537444c