376   u32 i, n, pc;  in scrubBackupBtree()  local
413   pc = scrubBackupInt16(&aTop[1]);  in scrubBackupBtree()
414   if( pc>0 && pc<x ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
415   while( pc ){  in scrubBackupBtree()
416     if( pc>(p->szUsable)-4 ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
417     n = scrubBackupInt16(&a[pc+2]);  in scrubBackupBtree()
418     if( pc+n>(p->szUsable) ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
419     if( n>4 ) memset(&a[pc+4], 0, n-4);  in scrubBackupBtree()
420     x = scrubBackupInt16(&a[pc]);  in scrubBackupBtree()
421     if( x<pc+4 && x>0 ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
422     pc = x;  in scrubBackupBtree()
432     pc = scrubBackupInt16(&aCell[i*2]);  in scrubBackupBtree()
433     if( pc <= szHdr ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
434     if( pc > p->szUsable-3 ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
436       if( pc+4 > p->szUsable ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
437       iChild = scrubBackupInt32(&a[pc]);  in scrubBackupBtree()
438       pc += 4;  in scrubBackupBtree()
442     pc += scrubBackupVarint(&a[pc], &P);  in scrubBackupBtree()
443     if( pc >= p->szUsable ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
456       pc += scrubBackupVarintSize(&a[pc]);  in scrubBackupBtree()
457       if( pc > (p->szUsable-4) ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
460     if( pc+nLocal > p->szUsable-4 ){ ln=__LINE__; goto btree_corrupt; }  in scrubBackupBtree()
461     iChild = scrubBackupInt32(&a[pc+nLocal]);  in scrubBackupBtree()