fix corner case in pure_getters (#5617)

lib/compress.js

@@ -4469,7 +4469,13 @@ Compressor.prototype.compress = function(node) {
         def(AST_Binary, function(compressor) {
             return lazy_op[this.operator] && (this.left._dot_throw(compressor) || this.right._dot_throw(compressor));
         });
-        def(AST_Class, return_false);
+        def(AST_Class, function(compressor, force) {
+            return is_strict(compressor, force) && !all(this.properties, function(prop) {
+                if (prop.private) return true;
+                if (!prop.static) return true;
+                return !(prop instanceof AST_ClassGetter || prop instanceof AST_ClassSetter);
+            });
+        });
         def(AST_Conditional, function(compressor) {
             return this.consequent._dot_throw(compressor) || this.alternative._dot_throw(compressor);
         });
@@ -4484,7 +4490,7 @@ Compressor.prototype.compress = function(node) {
         def(AST_Null, return_true);
         def(AST_Object, function(compressor, force) {
             return is_strict(compressor, force) && !all(this.properties, function(prop) {
-                if (!(prop instanceof AST_ObjectKeyVal)) return false;
+                if (prop instanceof AST_ObjectGetter || prop instanceof AST_ObjectSetter) return false;
                 return !(prop.key === "__proto__" && prop.value._dot_throw(compressor, force));
             });
         });

test/compress/classes.js

@@ -746,6 +746,56 @@ separate_name: {
     node_version: ">=4"
 }
 
+static_getter: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        "use strict";
+        (class {
+            static get p() {
+                console.log("PASS");
+            };
+        }).p;
+    }
+    expect: {
+        "use strict";
+        (class {
+            static get p() {
+                console.log("PASS");
+            };
+        }).p;
+    }
+    expect_stdout: "PASS"
+    node_version: ">=4"
+}
+
+static_setter: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        "use strict";
+        (class {
+            static set p(v) {
+                console.log(v);
+            };
+        }).p = "PASS";
+    }
+    expect: {
+        "use strict";
+        (class {
+            static set p(v) {
+                console.log(v);
+            };
+        }).p = "PASS";
+    }
+    expect_stdout: "PASS"
+    node_version: ">=4"
+}
+
 static_side_effects: {
     options = {
         inline: true,