--- IO-AIO/AIO.xs	2012/04/10 05:01:33	1.213
+++ IO-AIO/AIO.xs	2012/07/25 16:12:28	1.216
@@ -985,6 +985,7 @@
     const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
 
     const_eio (FALLOC_FL_KEEP_SIZE)
+    const_eio (FALLOC_FL_PUNCH_HOLE)
 
     const_eio (READDIR_DENTS)
     const_eio (READDIR_DIRS_FIRST)
@@ -1217,7 +1218,10 @@
           {
             /* read: check type and grow scalar as necessary */
             SvUPGRADE (data, SVt_PV);
-            svptr = SvGROW (data, len + dataoffset + 1);
+            if (SvLEN (data) >= SvCUR (data))
+              svptr = SvGROW (data, len + dataoffset + 1);
+            else if (SvCUR (data) < len + dataoffset)
+              croak ("length + dataoffset outside of scalar, and cannot grow");
           }
 
         {
@@ -1688,7 +1692,7 @@
         RETVAL
 
 void
-mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
+mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
 	PPCODE:
         sv_unmagic (scalar, MMAP_MAGIC);
 {
@@ -1731,7 +1735,7 @@
         CODE:
 {
 	STRLEN svlen;
-  	void *addr = SvPVbyte (scalar, svlen);
+	void *addr = SvPVbyte (scalar, svlen);
         size_t len = SvUV (length);
 
         if (offset < 0)