[INFO] updating cached repository keatinge/rust-twilio-script
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/keatinge/rust-twilio-script
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/keatinge/rust-twilio-script" "work/ex/beta-1.37-6/sources/1.36.0/gh/keatinge/rust-twilio-script"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/keatinge/rust-twilio-script'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/keatinge/rust-twilio-script" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keatinge/rust-twilio-script"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keatinge/rust-twilio-script'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8872065bb4355bf652d60a9a2e9385dbb2ee04e6
[INFO] sha for GitHub repo keatinge/rust-twilio-script: 8872065bb4355bf652d60a9a2e9385dbb2ee04e6
[INFO] validating manifest of keatinge/rust-twilio-script 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 keatinge/rust-twilio-script 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 keatinge/rust-twilio-script
[INFO] finished frobbing keatinge/rust-twilio-script
[INFO] frobbed toml for keatinge/rust-twilio-script written to work/ex/beta-1.37-6/sources/1.36.0/gh/keatinge/rust-twilio-script/Cargo.toml
[INFO] started frobbing keatinge/rust-twilio-script
[INFO] finished frobbing keatinge/rust-twilio-script
[INFO] frobbed toml for keatinge/rust-twilio-script written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keatinge/rust-twilio-script/Cargo.toml
[INFO] crate keatinge/rust-twilio-script 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 keatinge/rust-twilio-script 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/keatinge/rust-twilio-script:/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] aa83d389b699aab2b122d35d0fdbe99cf807cdcab2b943a80ed543251d8b7dcf
[INFO] running `"docker" "start" "-a" "aa83d389b699aab2b122d35d0fdbe99cf807cdcab2b943a80ed543251d8b7dcf"`
[INFO] [stderr]    Compiling twilio_2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]   --> src/ctxmgr.rs:13:27
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct ContextManager<CTX_T> where CTX_T : Context {
[INFO] [stderr]    |                           ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]   --> src/ctxmgr.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]   --> src/ctxmgr.rs:18:6
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl<CTX_T> ContextManager<CTX_T> where CTX_T: Context + ::std::fmt::Debug {
[INFO] [stderr]    |      ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Basic`
[INFO] [stderr]  --> src/twiml.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use hyper::header::{Basic, ContentType, ContentLength};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:206:21
[INFO] [stderr]     |
[INFO] [stderr] 206 | struct ServiceMaker<CTX_T> where CTX_T : ctxmgr::Context {
[INFO] [stderr]     |                     ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:212:6
[INFO] [stderr]     |
[INFO] [stderr] 212 | impl<CTX_T> ServiceMaker<CTX_T> where CTX_T : ctxmgr::Context {
[INFO] [stderr]     |      ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[INFO] [stderr] 
[INFO] [stderr] warning: type parameter `CTX_T` should have an upper camel case name
[INFO] [stderr]    --> src/main.rs:222:6
[INFO] [stderr]     |
[INFO] [stderr] 222 | impl<CTX_T> hyper::server::NewService for ServiceMaker<CTX_T> where CTX_T : ctxmgr::Context + std::fmt::Debug + 'static {
[INFO] [stderr]     |      ^^^^^ help: convert the identifier to upper camel case: `CtxT`
[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 `twilio_2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aa83d389b699aab2b122d35d0fdbe99cf807cdcab2b943a80ed543251d8b7dcf"`
[INFO] running `"docker" "rm" "-f" "aa83d389b699aab2b122d35d0fdbe99cf807cdcab2b943a80ed543251d8b7dcf"`
[INFO] [stdout] aa83d389b699aab2b122d35d0fdbe99cf807cdcab2b943a80ed543251d8b7dcf