[INFO] crate mudpie 0.2.6 is already in cache
[INFO] extracting crate mudpie 0.2.6 into work/ex/beta-1.37-6/sources/1.36.0/reg/mudpie/0.2.6
[INFO] extracting crate mudpie 0.2.6 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mudpie/0.2.6
[INFO] validating manifest of mudpie-0.2.6 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 mudpie-0.2.6 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 mudpie-0.2.6
[INFO] finished frobbing mudpie-0.2.6
[INFO] frobbed toml for mudpie-0.2.6 written to work/ex/beta-1.37-6/sources/1.36.0/reg/mudpie/0.2.6/Cargo.toml
[INFO] started frobbing mudpie-0.2.6
[INFO] finished frobbing mudpie-0.2.6
[INFO] frobbed toml for mudpie-0.2.6 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mudpie/0.2.6/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 mudpie-0.2.6 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/mudpie/0.2.6:/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] 651b2ce745d4c056df560ce1683dd1d8feca758af83fac0d67ec4e2c1fe9891a
[INFO] running `"docker" "start" "-a" "651b2ce745d4c056df560ce1683dd1d8feca758af83fac0d67ec4e2c1fe9891a"`
[INFO] [stderr]    Compiling mudpie v0.2.6 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::ascii::OwnedAsciiExt`
[INFO] [stderr]  --> src/utils/http_request.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ascii::OwnedAsciiExt; // the magic for into_ascii_lowercase
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `OwnedAsciiExt` in `ascii`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::ascii::OwnedAsciiExt`
[INFO] [stderr]  --> src/webserver/read_request.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ascii::OwnedAsciiExt; 
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `OwnedAsciiExt` in `ascii`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::ascii::OwnedAsciiExt`
[INFO] [stderr]  --> src/webserver/router.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::ascii::OwnedAsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `OwnedAsciiExt` in `ascii`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(collections)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(tcp)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(std_misc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_ascii_lowercase` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]   --> src/utils/http_request.rs:60:44
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let method = request_parts[0].to_vec().into_ascii_lowercase();
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_ascii_lowercase` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]   --> src/utils/http_request.rs:62:46
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let protocol = request_parts[2].to_vec().into_ascii_lowercase();
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_all` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/utils/http_request.rs:126:26
[INFO] [stderr]     |
[INFO] [stderr] 126 |         nice_header_name.push_all(header_parts[0]);
[INFO] [stderr]     |                          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_ascii_lowercase` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/utils/http_request.rs:127:49
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let nice_header_name = nice_header_name.into_ascii_lowercase();
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_all` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/utils/http_request.rs:139:36
[INFO] [stderr]     |
[INFO] [stderr] 139 |                 (*entry.get_mut()).push_all(b",");
[INFO] [stderr]     |                                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_all` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/utils/http_request.rs:140:36
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 (*entry.get_mut()).push_all(&header_value);
[INFO] [stderr]     |                                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::slice::SliceConcatExt::connect': renamed to join
[INFO] [stderr]    --> src/webserver/mod.rs:370:42
[INFO] [stderr]     |
[INFO] [stderr] 370 |             let methods_joined = methods.connect(", ");
[INFO] [stderr]     |                                          ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_ascii_lowercase` found for type `std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/webserver/read_request.rs:113:36
[INFO] [stderr]     |
[INFO] [stderr] 113 |     let val = val.unwrap().clone().into_ascii_lowercase();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_all` found for type `&mut std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/webserver/read_request.rs:143:16
[INFO] [stderr]     |
[INFO] [stderr] 143 |         buffer.push_all(&chunk_buff[0..size]);
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_all` found for type `&mut std::vec::Vec<u8>` in the current scope
[INFO] [stderr]    --> src/webserver/read_request.rs:170:16
[INFO] [stderr]     |
[INFO] [stderr] 170 |         buffer.push_all(&chunk_buff[0..size]);
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_ascii_lowercase` found for type `std::string::String` in the current scope
[INFO] [stderr]   --> src/webserver/router.rs:89:43
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let method = p.trim().to_string().into_ascii_lowercase();
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: there is a method with a similar name: `to_ascii_lowercase`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 16 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `mudpie`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "651b2ce745d4c056df560ce1683dd1d8feca758af83fac0d67ec4e2c1fe9891a"`
[INFO] running `"docker" "rm" "-f" "651b2ce745d4c056df560ce1683dd1d8feca758af83fac0d67ec4e2c1fe9891a"`
[INFO] [stdout] 651b2ce745d4c056df560ce1683dd1d8feca758af83fac0d67ec4e2c1fe9891a