smallrye#216 - Fixed stackoverflow issue.

sources/yaml/src/main/java/io/smallrye/config/source/yaml/YamlConfigSource.java

@@ -119,7 +119,7 @@ private static void populateFromEntryNode(StringBuilder valueBuilder, Object o,
             for (Map.Entry<String, Object> entry : map.entrySet()) {
                 escapeMapKey(valueBuilder, entry.getKey(), escapeLevel + 1);
                 appendEscaped(valueBuilder, '=', escapeLevel);
-                populateFromEntryNode(valueBuilder, o, escapeLevel + 1);
+                populateFromEntryNode(valueBuilder, entry.getValue(), escapeLevel + 1);
             }
         } else if (o instanceof List) {
             final Iterator<?> iterator = ((List<?>) o).iterator();

sources/yaml/src/test/java/io/smallrye/config/source/yaml/ArrayTest.java

@@ -0,0 +1,25 @@
+package io.smallrye.config.source.yaml;
+
+import org.eclipse.microprofile.config.spi.ConfigSource;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ArrayTest {
+
+    @Test
+    public void array() {
+        String yaml = "de:\n" +
+                "  javahippie:\n" +
+                "    mpadmin:\n" +
+                "      instances:\n" +
+                "        -\n" +
+                "          name: \"Bing\"\n" +
+                "          uri: \"https://bing.com\"\n" +
+                "        -\n" +
+                "          name: \"Google\"\n" +
+                "          uri: \"https://www.google.com\"";
+
+        ConfigSource src = new YamlConfigSource("Yaml", yaml);
+        Assert.assertNotNull(src.getValue("de.javahippie.mpadmin.instances"));
+    }
+}