Nov 01 16:59:16.229 INFO checking rust_lsp-0.6.1 against master#05812fa8c588473f03e3fa7cf59cd84f4f37c715 for pr-55538
Nov 01 16:59:16.231 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-0/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55538/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +05812fa8c588473f03e3fa7cf59cd84f4f37c715-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 01 16:59:16.486 INFO blam! f59f30a45fe6a129a97358c3281257b7f374ce17a477c940bc45729b806e22fe
Nov 01 16:59:16.494 INFO running `"docker" "start" "-a" "f59f30a45fe6a129a97358c3281257b7f374ce17a477c940bc45729b806e22fe"`
Nov 01 16:59:17.344 INFO kablam! usermod: no changes
Nov 01 16:59:17.476 INFO kablam!     Checking rustdt_util v0.2.3
Nov 01 16:59:17.476 INFO kablam!    Compiling serde_codegen v0.8.23
Nov 01 16:59:17.476 INFO kablam!     Checking url v1.7.1
Nov 01 16:59:18.232 INFO kablam!     Checking rustdt-json_rpc v0.3.0
Nov 01 16:59:21.780 INFO kablam!    Compiling serde_derive v0.8.23
Nov 01 16:59:25.988 INFO kablam!     Checking languageserver-types v0.6.1
Nov 01 16:59:30.573 INFO kablam!     Checking rust_lsp v0.6.1 (/source)
Nov 01 16:59:35.249 INFO kablam! warning: variable does not need to be mutable
Nov 01 16:59:35.249 INFO kablam!   --> src/lsp.rs:75:9
Nov 01 16:59:35.249 INFO kablam!    |
Nov 01 16:59:35.249 INFO kablam! 75 |         mut msg_reader: &mut MR, endpoint: Endpoint, lsp_server_handler: SERVER
Nov 01 16:59:35.249 INFO kablam!    |         ----^^^^^^^^^^
Nov 01 16:59:35.249 INFO kablam!    |         |
Nov 01 16:59:35.249 INFO kablam!    |         help: remove this `mut`
Nov 01 16:59:35.249 INFO kablam!    |
Nov 01 16:59:35.249 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 16:59:35.249 INFO kablam! 
Nov 01 16:59:35.255 INFO kablam! warning: variable does not need to be mutable
Nov 01 16:59:35.255 INFO kablam!   --> src/lsp.rs:95:9
Nov 01 16:59:35.255 INFO kablam!    |
Nov 01 16:59:35.255 INFO kablam! 95 |         mut msg_reader: &mut MR, endpoint: Endpoint, request_handler: Box<RequestHandler>
Nov 01 16:59:35.255 INFO kablam!    |         ----^^^^^^^^^^
Nov 01 16:59:35.255 INFO kablam!    |         |
Nov 01 16:59:35.255 INFO kablam!    |         help: remove this `mut`
Nov 01 16:59:35.255 INFO kablam! 
Nov 01 16:59:35.428 INFO kablam! warning: variable does not need to be mutable
Nov 01 16:59:35.428 INFO kablam!   --> src/lsp.rs:75:9
Nov 01 16:59:35.428 INFO kablam!    |
Nov 01 16:59:35.428 INFO kablam! 75 |         mut msg_reader: &mut MR, endpoint: Endpoint, lsp_server_handler: SERVER
Nov 01 16:59:35.428 INFO kablam!    |         ----^^^^^^^^^^
Nov 01 16:59:35.428 INFO kablam!    |         |
Nov 01 16:59:35.428 INFO kablam!    |         help: remove this `mut`
Nov 01 16:59:35.428 INFO kablam!    |
Nov 01 16:59:35.428 INFO kablam!    = note: #[warn(unused_mut)] on by default
Nov 01 16:59:35.428 INFO kablam! 
Nov 01 16:59:35.428 INFO kablam! warning: variable does not need to be mutable
Nov 01 16:59:35.428 INFO kablam!   --> src/lsp.rs:95:9
Nov 01 16:59:35.428 INFO kablam!    |
Nov 01 16:59:35.428 INFO kablam! 95 |         mut msg_reader: &mut MR, endpoint: Endpoint, request_handler: Box<RequestHandler>
Nov 01 16:59:35.428 INFO kablam!    |         ----^^^^^^^^^^
Nov 01 16:59:35.428 INFO kablam!    |         |
Nov 01 16:59:35.428 INFO kablam!    |         help: remove this `mut`
Nov 01 16:59:35.428 INFO kablam! 
Nov 01 16:59:36.101 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 18.73s
Nov 01 16:59:36.104 INFO kablam! su: No module specific data is present
Nov 01 16:59:36.564 INFO running `"docker" "rm" "-f" "f59f30a45fe6a129a97358c3281257b7f374ce17a477c940bc45729b806e22fe"`
Nov 01 16:59:36.688 INFO blam! f59f30a45fe6a129a97358c3281257b7f374ce17a477c940bc45729b806e22fe