autoload/handlers.vim | 19 ++++++++++++++-----
 autoload/lsp.vim      |  2 +-

diff --git a/autoload/handlers.vim b/autoload/handlers.vim
index 8132c88adbbdbbedfc679ed5876f0b55053fa52f..53f265ef21dca1b1107b4f18b71824f3aff88b09 100644
--- a/autoload/handlers.vim
+++ b/autoload/handlers.vim
@@ -72,6 +72,10 @@
 # process the 'textDocument/signatureHelp' reply from the LSP server
 # Result: SignatureHelp | null
 def s:processSignaturehelpReply(lspserver: dict<any>, req: dict<any>, reply: dict<any>): void
+  if reply.result->empty()
+    return
+  endif
+
   var result: dict<any> = reply.result
   if result.signatures->len() <= 0
     WarnMsg('No signature help available')
@@ -135,6 +139,9 @@
 # process the 'textDocument/completion' reply from the LSP server
 # Result: CompletionItem[] | CompletionList | null
 def s:processCompletionReply(lspserver: dict<any>, req: dict<any>, reply: dict<any>): void
+  if reply.result->empty()
+    return
+  endif
 
   var items: list<dict<any>>
   if type(reply.result) == v:t_list
@@ -178,7 +185,7 @@
 # process the 'textDocument/hover' reply from the LSP server
 # Result: Hover | null
 def s:processHoverReply(lspserver: dict<any>, req: dict<any>, reply: dict<any>): void
-  if type(reply.result) == v:t_none
+  if reply.result->empty()
     return
   endif
 
@@ -226,7 +233,7 @@
 # process the 'textDocument/references' reply from the LSP server
 # Result: Location[] | null
 def s:processReferencesReply(lspserver: dict<any>, req: dict<any>, reply: dict<any>): void
-  if type(reply.result) == v:t_none || reply.result->empty()
+  if reply.result->empty()
     WarnMsg('Error: No references found')
     return
   endif
@@ -749,10 +756,12 @@   var last_lnum: number = line('$')
   for foldRange in reply.result
     end_lnum = foldRange.endLine + 1
     if end_lnum < foldRange.startLine + 2
-    end_lnum = foldRange.startLine + 2
+      end_lnum = foldRange.startLine + 2
     endif
     exe ':' .. (foldRange.startLine + 2) .. ',' .. end_lnum .. 'fold'
-    :foldopen!
+    # Open all the folds, otherwise the subsequently created folds are not
+    # correct.
+    :silent! foldopen!
   endfor
 
   if &foldcolumn == 0
@@ -830,7 +839,7 @@ 			col: r.start.character + 1})
   endfor
   symbols->setwinvar(lspserver.workspaceSymbolPopup, 'LspSymbolTable')
   lspserver.workspaceSymbolPopup->popup_settext(
-					symbols->copy()->map('v:val.name'))
+				symbols->copy()->mapnew('v:val.name'))
 enddef
 
 # Process various reply messages from the LSP server
diff --git a/autoload/lsp.vim b/autoload/lsp.vim
index d7652047e3df013dedd15a544ed8b715d69e52d2..8408ed506cc6c382e5d2115af3a1b07cd837fb9c 100644
--- a/autoload/lsp.vim
+++ b/autoload/lsp.vim
@@ -450,7 +450,7 @@
 # sort the diaganostics messages for a buffer by line number
 def s:getSortedDiagLines(lspserver: dict<any>, bnr: number): list<number>
   var lnums: list<number> =
-		lspserver.diagsMap[bnr]->keys()->map((_, v) => str2nr(v))
+		lspserver.diagsMap[bnr]->keys()->mapnew((_, v) => str2nr(v))
   return lnums->sort((a, b) => a - b)
 enddef