Don't find references in parallel

Duhemm · Duhemm · commit c23a304d8533 · 2018-11-12T11:43:13.000+01:00
It appears that the `TreeUnpickler` is not able to be run in parallel.
diff --git a/language-server/src/dotty/tools/languageserver/DottyLanguageServer.scala b/language-server/src/dotty/tools/languageserver/DottyLanguageServer.scala
@@ -342,7 +342,7 @@ class DottyLanguageServer extends LanguageServer
         (remoteDriver, ctx, definition)
       }
 
-      perProjectInfo.par.flatMap { (remoteDriver, ctx, definition) =>
+      perProjectInfo.flatMap { (remoteDriver, ctx, definition) =>
         val trees = remoteDriver.sourceTreesContaining(symbolName)(ctx)
         Interactive.findTreesMatching(trees, includes, definition)(ctx)
       }

Original file line number	Diff line number	Diff line change
`@@ -342,7 +342,7 @@ class DottyLanguageServer extends LanguageServer`
`342`	`342`	`(remoteDriver, ctx, definition)`
`343`	`343`	`}`
`344`	`344`
`345`		`- perProjectInfo.par.flatMap { (remoteDriver, ctx, definition) =>`
	`345`	`+ perProjectInfo.flatMap { (remoteDriver, ctx, definition) =>`
`346`	`346`	`val trees = remoteDriver.sourceTreesContaining(symbolName)(ctx)`
`347`	`347`	`Interactive.findTreesMatching(trees, includes, definition)(ctx)`
`348`	`348`	`}`