Oct 13 09:17:12.944 INFO checking rust_lsp-0.6.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 09:17:12.946 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-3/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-3/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 09:17:13.363 INFO blam! 38103c8460652ccb41f0fc098c7f24b268de7b5406dbceb9611c09407823f3c1
Oct 13 09:17:13.366 INFO running `"docker" "start" "-a" "38103c8460652ccb41f0fc098c7f24b268de7b5406dbceb9611c09407823f3c1"`
Oct 13 09:17:13.750 INFO kablam! usermod: no changes
Oct 13 09:17:13.896 INFO kablam!     Checking rustdt_util v0.2.3
Oct 13 09:17:13.901 INFO kablam!    Compiling serde_codegen v0.8.23
Oct 13 09:17:13.901 INFO kablam!     Checking url v1.7.1
Oct 13 09:17:15.228 INFO kablam!     Checking rustdt-json_rpc v0.3.0
Oct 13 09:17:18.479 INFO kablam!    Compiling serde_derive v0.8.23
Oct 13 09:17:22.205 INFO kablam!     Checking languageserver-types v0.6.1
Oct 13 09:17:26.305 INFO kablam!     Checking rust_lsp v0.6.1 (/source)
Oct 13 09:17:29.180 INFO kablam! warning: variable does not need to be mutable
Oct 13 09:17:29.180 INFO kablam!   --> src/lsp.rs:75:9
Oct 13 09:17:29.180 INFO kablam!    |
Oct 13 09:17:29.180 INFO kablam! 75 |         mut msg_reader: &mut MR, endpoint: Endpoint, lsp_server_handler: SERVER
Oct 13 09:17:29.180 INFO kablam!    |         ----^^^^^^^^^^
Oct 13 09:17:29.180 INFO kablam!    |         |
Oct 13 09:17:29.180 INFO kablam!    |         help: remove this `mut`
Oct 13 09:17:29.180 INFO kablam!    |
Oct 13 09:17:29.180 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 09:17:29.180 INFO kablam! 
Oct 13 09:17:29.184 INFO kablam! warning: variable does not need to be mutable
Oct 13 09:17:29.184 INFO kablam!   --> src/lsp.rs:95:9
Oct 13 09:17:29.184 INFO kablam!    |
Oct 13 09:17:29.184 INFO kablam! 95 |         mut msg_reader: &mut MR, endpoint: Endpoint, request_handler: Box<RequestHandler>
Oct 13 09:17:29.184 INFO kablam!    |         ----^^^^^^^^^^
Oct 13 09:17:29.184 INFO kablam!    |         |
Oct 13 09:17:29.184 INFO kablam!    |         help: remove this `mut`
Oct 13 09:17:29.184 INFO kablam! 
Oct 13 09:17:29.348 INFO kablam! warning: variable does not need to be mutable
Oct 13 09:17:29.349 INFO kablam!   --> src/lsp.rs:75:9
Oct 13 09:17:29.349 INFO kablam!    |
Oct 13 09:17:29.349 INFO kablam! 75 |         mut msg_reader: &mut MR, endpoint: Endpoint, lsp_server_handler: SERVER
Oct 13 09:17:29.349 INFO kablam!    |         ----^^^^^^^^^^
Oct 13 09:17:29.350 INFO kablam!    |         |
Oct 13 09:17:29.350 INFO kablam!    |         help: remove this `mut`
Oct 13 09:17:29.350 INFO kablam!    |
Oct 13 09:17:29.350 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 09:17:29.351 INFO kablam! 
Oct 13 09:17:29.351 INFO kablam! warning: variable does not need to be mutable
Oct 13 09:17:29.351 INFO kablam!   --> src/lsp.rs:95:9
Oct 13 09:17:29.352 INFO kablam!    |
Oct 13 09:17:29.352 INFO kablam! 95 |         mut msg_reader: &mut MR, endpoint: Endpoint, request_handler: Box<RequestHandler>
Oct 13 09:17:29.352 INFO kablam!    |         ----^^^^^^^^^^
Oct 13 09:17:29.352 INFO kablam!    |         |
Oct 13 09:17:29.353 INFO kablam!    |         help: remove this `mut`
Oct 13 09:17:29.353 INFO kablam! 
Oct 13 09:17:29.954 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 16.18s
Oct 13 09:17:29.960 INFO kablam! su: No module specific data is present
Oct 13 09:17:30.333 INFO running `"docker" "rm" "-f" "38103c8460652ccb41f0fc098c7f24b268de7b5406dbceb9611c09407823f3c1"`
Oct 13 09:17:30.555 INFO blam! 38103c8460652ccb41f0fc098c7f24b268de7b5406dbceb9611c09407823f3c1