fix: stray print statement and no cause for coverage file output

Signed-off-by: Sam Gammon <[email protected]>

Author: sgammon

tools/src/com.oracle.truffle.tools.coverage/src/com/oracle/truffle/tools/coverage/impl/CoverageInstrument.java

@@ -136,7 +136,6 @@ protected static PrintStream chooseOutputStream(Env env, String absoluteOutputPa
         try {
             if (absoluteOutputPath != null) {
                 final File file = new File(absoluteOutputPath);
-                new PrintStream(env.out()).println("Printing output to " + file.getAbsolutePath());
                 return new PrintStream(new FileOutputStream(file));
             } else {
                 return new PrintStream(env.out());
@@ -145,6 +144,11 @@ protected static PrintStream chooseOutputStream(Env env, String absoluteOutputPa
             throw new AbstractTruffleException() {
                 static final long serialVersionUID = -1;
 
+		@Override
+		public Throwable getCause() {
+		    return e;
+		}
+
                 @Override
                 public String getMessage() {
                     return "File IO Exception caught during output printing.";