Without further ado, the following was found:

Issue:    B<…>size_t n → B<… size_t> I<n>

"B<int syscall(>size_t n;\n"
"B<            SYS_listmount, struct mnt_id_req *>I<req>B<,>\n"
"B<            uint64_t >I<mnt_ids>B<[>I<n>B<], size_t >I<n>B<,>\n"
"B<            unsigned long >I<flags>B<);>\n"