1 files changed, 13 insertions, 3 deletions

diff --git a/src/coding.c b/src/coding.c
index 4636a0712fe..69e3b7e3e3d 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -5696,9 +5696,19 @@ code_convert_region (from, from_byte, to, to_byte, coding, encodep, replace)
                 REQUIRE + LEN_BYTE = LEN_BYTE * (NEW / ORIG)
                 REQUIRE = LEN_BYTE * (NEW - ORIG) / ORIG
              Here, we are sure that NEW >= ORIG.  */
-          float ratio = coding->produced - coding->consumed;
-          ratio /= coding->consumed;
-          require = len_byte * ratio;
+          float ratio;
+
+          if (coding->produced <= coding->consumed)
+            {
+              /* This happens because of CCL-based coding system with
+                 eol-type CRLF.  */
+              require = 0;
+            }
+          else
+            {
+              ratio = (coding->produced - coding->consumed) / coding->consumed;
+              require = len_byte * ratio;
+            }
           first = 0;
         }
       if ((src - dst) < (require + 2000))