From 6914aa3e275b3f463f275562fa74f04e21486c82 Mon Sep 17 00:00:00 2001
From: David Schwartz <davidjoelschwartz@gmail.com>
Date: Mon, 21 Jul 2014 13:40:16 -0700
Subject: [PATCH] Check for payment increments that make no progress.
 (RIPD-374)

---
 src/ripple/module/app/paths/RippleCalc.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/ripple/module/app/paths/RippleCalc.cpp b/src/ripple/module/app/paths/RippleCalc.cpp
index 4c6342900..15911a732 100644
--- a/src/ripple/module/app/paths/RippleCalc.cpp
+++ b/src/ripple/module/app/paths/RippleCalc.cpp
@@ -268,6 +268,19 @@ TER rippleCalculate (
 
                     ++iDry;
                 }
+                else if (pspCur->outPass() == zero)
+                {
+                    // Path is not dry, but moved no funds
+                    // This should never happen. Consider the path dry
+
+                    WriteLog (lsWARNING, RippleCalc)
+                        << "rippelCalc: Non-dry path moves no funds";
+
+                    assert (false);
+
+                    pspCur->setQuality (0);
+                    ++iDry;
+                }
                 else
                 {
                     CondLog (!pspCur->inPass() || !pspCur->outPass(),