--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/TextBlockIllegalEscape.java	Tue Jul 16 10:48:22 2019 +0200
@@ -0,0 +1,14 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8227640
+ * @summary Verify that illegal escapes in text blocks do not crash the javac.
+ * @compile/fail/ref=TextBlockIllegalEscape.out --enable-preview -source ${jdk.version} -XDrawDiagnostics TextBlockIllegalEscape.java
+ */
+
+public class TextBlockIllegalEscape {
+    static void test() {
+        EQ("""
+           \!
+           """, "");
+    }
+}