DEBUG

Author: vinistock

Gemfile.lock

@@ -154,4 +154,4 @@ DEPENDENCIES
   test-unit
 
 BUNDLED WITH
-   2.6.9
+   2.7.2

test/integration_test.rb

@@ -470,9 +470,9 @@ def launch(workspace_path, exec = "ruby-lsp-launcher", extra_env = {})
     })
 
     # First message is the log of initializing Ruby LSP
-    read_message(stdout)
+    read_message(stdout, stderr)
     # Verify that initialization didn't fail
-    initialize_response = read_message(stdout)
+    initialize_response = read_message(stdout, stderr)
     refute(initialize_response[:error], initialize_response.dig(:error, :message))
 
     send_message(stdin, { id: 2, method: "shutdown" })
@@ -502,8 +502,10 @@ def send_message(stdin, message)
     stdin.flush
   end
 
-  def read_message(stdout)
+  def read_message(stdout, stderr)
     headers = stdout.gets("\r\n\r\n")
+    flunk(stderr.read) unless headers
+
     length = headers[/Content-Length: (\d+)/i, 1].to_i
     JSON.parse(stdout.read(length), symbolize_names: true)
   end