if (a_midlen < 0) a_midlen = 0;
if (b_midlen < 0) b_midlen = 0;
- name = xmalloc(len_a + len_b - pfx_length - sfx_length + 7);
+ name = xmalloc(pfx_length + a_midlen + b_midlen + sfx_length + 7);
sprintf(name, "%.*s{%.*s => %.*s}%s",
pfx_length, a,
a_midlen, a + pfx_length,