1 files changed, 5 insertions, 1 deletions
diff --git a/db/pdfile.h b/db/pdfile.h
index 084a542..d268aac 100644
--- a/db/pdfile.h
+++ b/db/pdfile.h
@@ -79,6 +79,8 @@ namespace mongo {
         void flush( bool sync );
         
     private:
+        void badOfs(int) const;
+
         int defaultSize( const char *filename ) const;
 
         Extent* getExtent(DiskLoc loc);
@@ -255,6 +257,8 @@ namespace mongo {
         Extent* getPrevExtent() {
             return xprev.isNull() ? 0 : DataFileMgr::getExtent(xprev);
         }
+        
+        static int maxSize();
     };
 
     /*
@@ -339,7 +343,7 @@ namespace mongo {
 
     inline Record* MongoDataFile::recordAt(DiskLoc dl) {
         int ofs = dl.getOfs();
-        assert( ofs >= DataFileHeader::HeaderSize );
+        if( ofs < DataFileHeader::HeaderSize ) badOfs(ofs); // will uassert - external call to keep out of the normal code path
         return (Record*) _p.at(ofs, -1);
     }