Improved error management on environment reading.

src/main.cr

@@ -132,7 +132,17 @@ class Environment
 				next
 			end
 
-			@@all << Environment.from_yaml File.read "#{path}/#{child}"
+			file_path = "#{path}/#{child}"
+
+			begin
+				environment = Environment.from_yaml File.read file_path
+			rescue e
+				STDERR << "error loading #{file_path}: " << e << "\n"
+				# FIXME: Print stacktrace? Debug mode?
+				next
+			end
+
+			@@all << environment
 		end
 	end