diff --git a/src/Cargo.lock b/src/Cargo.lock
index 73a2630911fa5..13ac35ed634d8 100644
--- a/src/Cargo.lock
+++ b/src/Cargo.lock
@@ -327,7 +327,6 @@ version = "0.2.0"
 [[package]]
 name = "clippy_lints"
 version = "0.0.211"
-source = "git+https://github.com/rust-lang-nursery/rust-clippy?rev=6c70013f93a18c1ca7990efa8b1464acc6e18ce7#6c70013f93a18c1ca7990efa8b1464acc6e18ce7"
 dependencies = [
  "cargo_metadata 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "if_chain 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -347,7 +346,8 @@ dependencies = [
 
 [[package]]
 name = "clippy_lints"
-version = "0.0.211"
+version = "0.0.212"
+source = "git+https://github.com/rust-lang-nursery/rust-clippy?rev=06d6710147742892efc17ed307b3397bfe093bc7#06d6710147742892efc17ed307b3397bfe093bc7"
 dependencies = [
  "cargo_metadata 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "if_chain 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -625,14 +625,6 @@ dependencies = [
  "log 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "enum_primitive"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "env_logger"
 version = "0.5.10"
@@ -1015,11 +1007,12 @@ dependencies = [
 
 [[package]]
 name = "languageserver-types"
-version = "0.43.0"
+version = "0.44.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-derive 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.69 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1270,16 +1263,19 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "num-integer"
-version = "0.1.39"
+name = "num-derive"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.14.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "num-traits"
-version = "0.1.43"
+name = "num-integer"
+version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1686,13 +1682,13 @@ version = "0.129.0"
 dependencies = [
  "cargo 0.30.0",
  "cargo_metadata 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy_lints 0.0.211 (git+https://github.com/rust-lang-nursery/rust-clippy?rev=6c70013f93a18c1ca7990efa8b1464acc6e18ce7)",
+ "clippy_lints 0.0.212 (git+https://github.com/rust-lang-nursery/rust-clippy?rev=06d6710147742892efc17ed307b3397bfe093bc7)",
  "env_logger 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "languageserver-types 0.43.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "languageserver-types 0.44.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3062,7 +3058,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum chalk-macros 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "295635afd6853aa9f20baeb7f0204862440c0fe994c5a253d5f479dac41d047e"
 "checksum chrono 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "6962c635d530328acc53ac6a955e83093fedc91c5809dfac1fa60fa470830a37"
 "checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
-"checksum clippy_lints 0.0.211 (git+https://github.com/rust-lang-nursery/rust-clippy?rev=6c70013f93a18c1ca7990efa8b1464acc6e18ce7)" = "<none>"
+"checksum clippy_lints 0.0.212 (git+https://github.com/rust-lang-nursery/rust-clippy?rev=06d6710147742892efc17ed307b3397bfe093bc7)" = "<none>"
 "checksum cmake 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "95470235c31c726d72bf2e1f421adc1e65b9d561bf5529612cbe1a72da1467b3"
 "checksum colored 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b0aa3473e85a3161b59845d6096b289bb577874cafeaf75ea1b1beaa6572c7fc"
 "checksum commoncrypto 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d056a8586ba25a1e4d61cb090900e495952c7886786fc55f909ab2f819b69007"
@@ -3085,7 +3081,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3be565ca5c557d7f59e7cfcf1844f9e3033650c929c6566f511e8005f205c1d0"
 "checksum elasticlunr-rs 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4837d77a1e157489a3933b743fd774ae75074e0e390b2b7f071530048a0d87ee"
 "checksum ena 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "88dc8393b3c7352f94092497f6b52019643e493b6b890eb417cdb7c46117e621"
-"checksum enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be4551092f4d519593039259a9ed8daedf0da12e5109c5280338073eaeb81180"
 "checksum env_logger 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)" = "0e6e40ebb0e66918a37b38c7acab4e10d299e0463fe2af5d29b9cc86710cfd2a"
 "checksum environment 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1f4b14e20978669064c33b4c1e0fb4083412e40fe56cbea2eae80fd7591503ee"
 "checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
@@ -3124,7 +3119,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum json 0.11.13 (registry+https://github.com/rust-lang/crates.io-index)" = "9ad0485404155f45cce53a40d4b2d6ac356418300daed05273d9e26f91c390be"
 "checksum jsonrpc-core 8.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ddf83704f4e79979a424d1082dd2c1e52683058056c9280efa19ac5f6bc9033c"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum languageserver-types 0.43.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dedb2c8010c9c7530b205fd16ed24a158c3a46634cb0fc61528b17cbbb55df1a"
+"checksum languageserver-types 0.44.0 (registry+https://github.com/rust-lang/crates.io-index)" = "967ee31e22d81605bb42c93fc7e0fa363c0adc560506e78d3508a2d20b508b74"
 "checksum lazy_static 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "76f033c7ad61445c5b347c7382dd1237847eb1bce590fe50365dcb33d546be73"
 "checksum lazy_static 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e6412c5e2ad9584b0b8e979393122026cdd6d2a80b933f890dcd694ddbe73739"
 "checksum lazycell 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a6f08839bc70ef4a3fe1d566d5350f519c5912ea86be0df1740a7d247c7fc0ef"
@@ -3149,8 +3144,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum miow 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9224c91f82b3c47cf53dcf78dfaa20d6888fbcc5d272d5f2fcdf8a697f3c987d"
 "checksum new_debug_unreachable 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0cdc457076c78ab54d5e0d6fa7c47981757f1e34dc39ff92787f217dede586c4"
 "checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
+"checksum num-derive 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0d2c31b75c36a993d30c7a13d70513cb93f02acafdd5b7ba250f9b0e18615de7"
 "checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
-"checksum num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
 "checksum num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "630de1ef5cc79d0cdd78b7e33b81f083cbfe90de0f4b2b2f07f905867c70e9fe"
 "checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
 "checksum open 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c281318d992e4432cfa799969467003d05921582a7489a8325e37f8a450d5113"
diff --git a/src/tools/rls b/src/tools/rls
index 6b4238b46595d..4e4cf431f06c3 160000
--- a/src/tools/rls
+++ b/src/tools/rls
@@ -1 +1 @@
-Subproject commit 6b4238b46595de1660a95887b287ddabe62726ea
+Subproject commit 4e4cf431f06c323e736e83eae9e3b785ed435eb7