when calling block_stats() like $dom->block_stats(), it will reprot errors: Attempt to free unreferenced scalar: SV 0x2598498, Perl interpreter: 0x11a0010. Attempt to free unreferenced scalar: SV 0x258c498, Perl interpreter: 0x11a0010. This patch fix it. --- Virt.xs | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/Virt.xs b/Virt.xs index e5d8438..9ef9715 100644 --- a/Virt.xs +++ b/Virt.xs @@ -3358,6 +3358,7 @@ block_stats(dom, path, flags=0) field = "flush_reqs"; if (field) { SV *val = hv_delete(RETVAL, params[i].field, strlen(params[i].field), 0); + SvREFCNT_inc(val); (void)hv_store(RETVAL, field, strlen(field), val, 0); } }