diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheck.java b/src/main/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheck.java
index d3fbed03e..b3dfd3244 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheck.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheck.java
@@ -146,7 +146,8 @@ public class SuppressWarningsCheck extends AbstractFormatCheck {
         final DetailAST warningHolder =
             this.findWarningsHolder(annotation);
 
-        final DetailAST token = warningHolder.findFirstToken(TokenTypes.ANNOTATION_MEMBER_VALUE_PAIR);
+        final DetailAST token =
+                warningHolder.findFirstToken(TokenTypes.ANNOTATION_MEMBER_VALUE_PAIR);
         DetailAST warning;
 
         if (token != null) {
@@ -188,8 +189,8 @@ public class SuppressWarningsCheck extends AbstractFormatCheck {
                     case TokenTypes.DOT:
                         break;
                     default:
-                        throw new IllegalStateException("Should never get here, type: "
-                                + fChild.getType() + " text: " + fChild.getText());
+                        // #1252 - cases like @SuppressWarnings("un" + "used") or
+                        // @SuppressWarnings((String) "unused")
                 }
             }
             warning = warning.getNextSibling();
diff --git a/src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheckTest.java b/src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheckTest.java
index ff189466a..059f6eb54 100644
--- a/src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheckTest.java
+++ b/src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/SuppressWarningsCheckTest.java
@@ -826,4 +826,18 @@ public class SuppressWarningsCheckTest extends BaseCheckTestSupport {
         verify(checkConfig, getPath("annotation" + File.separator
                 + "SuppressWarningsValuePair.java"), expected);
     }
+
+    @Test
+    public void testWorkingProperlyOnComplexAnnotations() throws Exception {
+        DefaultConfiguration checkConfig = createCheckConfig(SuppressWarningsCheck.class);
+
+        String[] expected = {
+            "18:34: " + getCheckMessage(MSG_KEY_SUPPRESSED_WARNING_NOT_ALLOWED, ""),
+            "24:23: " + getCheckMessage(MSG_KEY_SUPPRESSED_WARNING_NOT_ALLOWED, ""),
+            "28:52: " + getCheckMessage(MSG_KEY_SUPPRESSED_WARNING_NOT_ALLOWED, ""),
+            "33:5: " + getCheckMessage(MSG_KEY_SUPPRESSED_WARNING_NOT_ALLOWED, ""),
+        };
+
+        verify(checkConfig, getPath("InputSuppressWarningsHolder.java"), expected);
+    }
 }