--- gptfdisk-0.8.7.old/gpt.cc	2013-07-09 03:01:09.000000000 +0100

+++ gptfdisk-0.8.7/gpt.cc	2013-09-13 14:12:19.154495469 +0100

@@ -1402,6 +1402,10 @@

 // Show detailed information on the specified partition

 void GPTData::ShowPartDetails(uint32_t partNum) {

+   if (partNum >= numParts) {

+     cerr << "Partition number out of range\n";

+     exit (1);

+   }

    if (!IsFreePartNum(partNum)) {

       partitions[partNum].ShowDetails(blockSize);

    } else {