diff -r 5d4c3724e4c7 -r 03fbcd06b4c0 src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/CompilationWrapper.java
--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/CompilationWrapper.java	Thu Nov 14 11:16:14 2019 -0800
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/CompilationWrapper.java	Thu Nov 14 12:21:00 2019 -0800
@@ -243,6 +243,9 @@
                 String message;
                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
                 try (PrintStream ps = new PrintStream(baos)) {
+                    // This output is used by external tools to detect compilation failures.
+                    ps.println("[[[Graal compilation failure]]]");
+
                     ps.printf("%s: Compilation of %s failed:%n", Thread.currentThread(), this);
                     cause.printStackTrace(ps);
                     ps.printf("To disable compilation failure notifications, set %s to %s (e.g., -Dgraal.%s=%s).%n",