一个测试用例上的malloc分段错误

Question

Can any guru please assist me in identifying a segmentation fault? The segmentation fault seem to only be problematic on one of my test cases and appears to happen when allocating memory for a particular pointer within a struct. This works in all other test cases, which makes it kind of strange.

Here's my code:

http://pastebin.com/dfUqQnYy - the segmentation fault occurs at line 453.

speeches[i].who = malloc(nb_of_sirs_involved * sizeof(int));

Here are example inputs passed as arguments (using cat):

http://pastebin.com/YWv1F88G - the one causing the segmentation fault.

http://pastebin.com/i0V7KNH3 - one of the other test cases that do not cause segmentation fault.

I'm not sure what is wrong. What causes a malloc to fail? I'm sure I have enough memory to allocate!

Answer 1

I found problem. It was a boolean variable which wasn't initialised... I don't know how it can be related to speeches[i].who but it fixed my problem. Thanks all.