Fix https://github.com/Exiv2/exiv2/issues/55 Thank You, Raphaël Hertzog.

include/exiv2/value.hpp

@@ -1662,7 +1662,7 @@ namespace Exiv2 {
     template<>
     inline long ValueType<Rational>::toLong(long n) const
     {
-        ok_ = (value_[n].second != 0);
+        ok_ = (value_[n].second != 0 && INT_MIN < value_[n].first && value_[n].first < INT_MAX );
         if (!ok_) return 0;
         return value_[n].first / value_[n].second;
     }

test/bugfixes-test.sh

@@ -602,6 +602,7 @@ source ./functions.source
     runTest exiv2 -pX                   $filename | xmllint --format -
 
     num=1231
+    printf "$num " >&3
     for X in a b; do
       filename=exiv2-bug$num$X.jpg
       echo '------>' Bug $filename '<-------' >&2
@@ -622,6 +623,7 @@ source ./functions.source
     runTest exiv2 -pa                   $filename
 
     num=1252
+    printf "$num " >&3
     for X in a b; do
       filename=exiv2-bug$num$X.exv
       echo '------>' Bug $filename '<-------' >&2
@@ -630,6 +632,7 @@ source ./functions.source
     done
 
     num=g20
+    printf "$num " >&3
     filename=exiv2-$num.exv
     echo '------>' Bug $filename '<-------' >&2
     copyTestFile                      $filename
@@ -643,13 +646,20 @@ source ./functions.source
       runTest exiv2 -pa --grep lenstype/i  $filename
     done
 
-
     num=g45
+    printf "$num " >&3
     filename=exiv2-$num.exv
     echo '------>' Bug $filename '<-------' >&2
     copyTestFile                      $filename
     runTest exiv2 -pa --grep lens/i   $filename
 
+    num=g55
+    printf "$num " >&3
+    filename=POC8
+    echo '------>' Bug $filename '<-------' >&2
+    copyTestFile                      $filename
+    runTest exiv2                     $filename 2>/dev/null
+
 ) 3>&1 > $results 2>&1
 
 printf "\n"