Properly assign overflow page number on compact backup

dependencies/lmdb/libraries/liblmdb/mdb.c

@@ -11577,7 +11577,7 @@ mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
 						}
 						mo = (MDB_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]);
 						memcpy(mo, omp, my->mc_env->me_psize);
-						ovp.op_pgno = my->mc_next_pgno;
+						ovp.op_pgno = mo->mp_pgno = my->mc_next_pgno;
 						ovp.op_txnid = 1;
 						memcpy(NODEDATA(ni), &ovp, sizeof(ovp));
 						my->mc_next_pgno += ovp.op_pages;

open.js

@@ -296,7 +296,7 @@ export function open(path, options) {
 			if (noFSAccess)
 				return;
 			fs.mkdirSync(pathModule.dirname(path), { recursive: true });
-			return new Promise((resolve, reject) => env.copy(path, false, (error) => {
+			return new Promise((resolve, reject) => env.copy(path, compact, (error) => {
 				if (error) {
 					reject(error);
 				} else {

test/index.test.js

@@ -1745,7 +1745,7 @@ describe('lmdb-js', function () {
 				});
 				should.equal(dbRAS.get(3).name, 'three');
 			});
-			it.skip('can backup and use backup', async function () {
+			it('can backup and use backup', async function () {
 				if (options.encryptionKey)
 					// it won't match the environment
 					return;
@@ -1764,14 +1764,10 @@ describe('lmdb-js', function () {
 				let backupDb = open(testDirPath + '/backup.mdb', options);
 				try {
 					backupDb.get('for-backup-110').should.equal(value.slice(0, 5500));
-					value += ' changed';
 					for (let i = 0; i < 100; i++) {
-						const testGet = backupDb.get('for-backup-5');
-						console.log('testGetSize', testGet.length);
-						console.log('writing on backup file',i);
 						await backupDb.put('for-backup-' + i, 'test');
 					}
-					backupDb.get('for-backup-1').should.equal(value);
+					backupDb.get('for-backup-1').should.equal('test');
 				} finally {
 					await backupDb.close();
 				}