Internal server error when too many file extensions are given

[Former user]

I just created a group lab with the string .pdf, .txt, .jpeg, .png, .jpg, .c, .java, .zip, .tar, .tar.gz, .tar.xz, .rar, .hs, .c, .cc, .cpp in the allowed file extensions. Fire failed with "internal server error".

Hope it's not a buffer overflow somewhere there ☺