diff --git a/lib/compress.js b/lib/compress.js
index 3d6945d0..e477a2d6 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4828,7 +4828,7 @@ merge(Compressor.prototype, {
         }
         if (is_lhs(self, compressor.parent())) return self;
         if (compressor.option("properties") && key !== prop) {
-            var node = self.flatten_object(property);
+            var node = self.flatten_object(property, compressor);
             if (node) {
                 expr = self.expression = node.expression;
                 prop = self.property = node.property;
@@ -4888,22 +4888,26 @@ merge(Compressor.prototype, {
         return result;
     });
 
-    AST_PropAccess.DEFMETHOD("flatten_object", function(key) {
+    AST_PropAccess.DEFMETHOD("flatten_object", function(key, compressor) {
+        var arrows = compressor.option("unsafe_arrows") && compressor.option("ecma") >= 6;
         var expr = this.expression;
         if (expr instanceof AST_Object) {
             var props = expr.properties;
             for (var i = props.length; --i >= 0;) {
                 var prop = props[i];
-                if ("" + prop.key == key) {
+                if ("" + (prop instanceof AST_ConciseMethod ? prop.key.name : prop.key) == key) {
                     if (!all(props, function(prop) {
-                        return prop instanceof AST_ObjectKeyVal;
+                        return prop instanceof AST_ObjectKeyVal
+                            || arrows && prop instanceof AST_ConciseMethod && !prop.is_generator;
                     })) break;
                     var value = prop.value;
-                    if (value instanceof AST_Function && value.contains_this()) break;
+                    if ((value instanceof AST_Accessor || value instanceof AST_Function)
+                        && value.contains_this()) break;
                     return make_node(AST_Sub, this, {
                         expression: make_node(AST_Array, expr, {
                             elements: props.map(function(prop) {
-                                return prop.value;
+                                var v = prop.value;
+                                return v instanceof AST_Accessor ? make_node(AST_Function, v, v) : v;
                             })
                         }),
                         property: make_node(AST_Number, this, {
@@ -4944,7 +4948,7 @@ merge(Compressor.prototype, {
         }
         if (is_lhs(self, compressor.parent())) return self;
         if (compressor.option("properties")) {
-            var node = self.flatten_object(self.property);
+            var node = self.flatten_object(self.property, compressor);
             if (node) return node.optimize(compressor);
         }
         var ev = self.evaluate(compressor);
diff --git a/test/compress/drop-unused.js b/test/compress/drop-unused.js
index f849d69d..0a88220d 100644
--- a/test/compress/drop-unused.js
+++ b/test/compress/drop-unused.js
@@ -1291,7 +1291,6 @@ issue_2063: {
     }
     expect: {
         var a;
-        var a;
     }
 }
 
diff --git a/test/compress/harmony.js b/test/compress/harmony.js
index 60bc5793..f2e68b17 100644
--- a/test/compress/harmony.js
+++ b/test/compress/harmony.js
@@ -902,10 +902,10 @@ issue_2349b: {
         evaluate: true,
         inline: true,
         passes: 3,
+        properties: true,
         reduce_vars: true,
         toplevel: true,
         side_effects: true,
-        unsafe: true,
         unsafe_arrows: true,
         unused: true,
     }
diff --git a/test/compress/properties.js b/test/compress/properties.js
index 3a94c82c..f9b2e294 100644
--- a/test/compress/properties.js
+++ b/test/compress/properties.js
@@ -797,8 +797,8 @@ issue_2208_5: {
 issue_2208_6: {
     options = {
         inline: true,
+        properties: true,
         side_effects: true,
-        unsafe: true,
     }
     input: {
         console.log({
@@ -814,9 +814,11 @@ issue_2208_6: {
 
 issue_2208_7: {
     options = {
+        ecma: 6,
         inline: true,
+        properties: true,
         side_effects: true,
-        unsafe: true,
+        unsafe_arrows: true,
     }
     input: {
         console.log({
@@ -834,9 +836,11 @@ issue_2208_7: {
 
 issue_2208_8: {
     options = {
+        ecma: 6,
         inline: true,
+        properties: true,
         side_effects: true,
-        unsafe: true,
+        unsafe_arrows: true,
     }
     input: {
         console.log({
@@ -856,17 +860,17 @@ issue_2208_8: {
                 return x();
             }
         }.p());
-        console.log(async function() {
+        console.log((async () => {
             return await x();
-        }());
+        })());
     }
 }
 
 issue_2208_9: {
     options = {
         inline: true,
+        properties: true,
         side_effects: true,
-        unsafe: true,
     }
     input: {
         a = 42;
diff --git a/test/compress/template-string.js b/test/compress/template-string.js
index 5e6e01f8..a84c1042 100644
--- a/test/compress/template-string.js
+++ b/test/compress/template-string.js
@@ -442,7 +442,7 @@ simple_string: {
         console.log({[`foo`]: 1}[`foo`], `hi` == "hi", `world`);
     }
     expect: {
-        console.log({foo: 1}.foo, true, "world");
+        console.log([ 1 ][0], true, "world");
     }
     expect_stdout: "1 true 'world'"
     node_version: ">=4"