if (!string_vformat(&gs, SVFMT_REBUFFER, format, ap))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "string too long in header_add: "
- "%.100s ...", string_from_gstring(&gs));
+ "%.100Y ...", &gs);
if (gs.s != buf) store_release_above(buf);
gstring_release_unused(&gs);