Handle nil line.

lib/protocol/http1/connection.rb

@@ -286,11 +286,11 @@ def read(length)
 			end
 
 			def read_line?
-				line = @stream.gets(CRLF, @maximum_line_length)
-
-				unless line.chomp!(CRLF)
-					# This basically means that the request line, response line, header, or chunked length line is too long.
-					raise LineLengthError, "Line too long!"
+				if line = @stream.gets(CRLF, @maximum_line_length)
+					unless line.chomp!(CRLF)
+						# This basically means that the request line, response line, header, or chunked length line is too long.
+						raise LineLengthError, "Line too long!"
+					end
 				end
 
 				return line

test/protocol/http1/connection/bad.rb

@@ -145,4 +145,19 @@ def input
 			end.to raise_exception(Protocol::HTTP1::LineLengthError)
 		end
 	end
+
+	with "incomplete headers" do
+		def input
+			<<~HTTP.gsub("\n", "\r\n")
+			POST / HTTP/1.1
+			Host: a.com
+			HTTP
+		end
+
+		it "should fail to parse the request" do
+			expect do
+				server.read_request
+			end.to raise_exception(EOFError)
+		end
+	end
 end