fix: handle runtime_error during testing

src/test/wacc/examples.scala

@@ -92,7 +92,13 @@ class ParallelExamplesSpec extends AnyFlatSpec with BeforeAndAfterAll {
       )
 
       assert(process.exitValue == expectedExit)
-      assert(stdout.toString.replaceAll("0x[0-9a-f]+", "#addrs#") == expectedOutput)
+      assert(
+        stdout.toString
+          .replaceAll("0x[0-9a-f]+", "#addrs#")
+          .replaceAll("fatal error:.*", "#runtime_error#\u0000")
+          .takeWhile(_ != '\u0000')
+        == expectedOutput
+      )
     }
   }