From 72f95238fb56b026fab9d919bb53df96817cc73a Mon Sep 17 00:00:00 2001
From: John Ralls <jralls@ceridwen.us>
Date: Sat, 15 Jul 2017 14:59:47 -0700
Subject: [PATCH] Prevent infinite loop in to_decimal if numerator becomes 0.

Also immediately return 0 if this is 0.
---
 src/libqof/qof/gnc-numeric.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libqof/qof/gnc-numeric.cpp b/src/libqof/qof/gnc-numeric.cpp
index 3e74568c83..8e79cfb2a5 100644
--- a/src/libqof/qof/gnc-numeric.cpp
+++ b/src/libqof/qof/gnc-numeric.cpp
@@ -321,6 +321,10 @@ GncNumeric::to_decimal(unsigned int max_places) const
 {
     if (max_places > max_leg_digits)
         max_places = max_leg_digits;
+
+    if (m_num == 0)
+	return GncNumeric();
+
     if (is_decimal())
     {
         if (m_num == 0 || m_den < powten(max_places))
@@ -350,7 +354,7 @@ GncNumeric::to_decimal(unsigned int max_places) const
         rr_num *= factor;
         rr_den *= factor;
     }
-    while (rr_num % 10 == 0)
+    while (!rr_num.isZero() && rr_num % 10 == 0)
     {
         rr_num /= 10;
         rr_den /= 10;