fix corner case in inline (#5664)

fixes #5662

Author: alexlamsl

lib/compress.js

@@ -6278,21 +6278,24 @@ Compressor.prototype.compress = function(node) {
                 var call = stat.value;
                 if (!call || call.TYPE != "Call") break;
                 if (call.is_expr_pure(compressor)) break;
-                var fn = call.expression;
-                if (fn instanceof AST_SymbolRef) {
-                    if (self.name && self.name.definition() === fn.definition()) break;
-                    fn = fn.fixed_value();
+                var exp = call.expression, fn;
+                if (!(exp instanceof AST_SymbolRef)) {
+                    fn = exp;
+                } else if (self.name && self.name.definition() === exp.definition()) {
+                    break;
+                } else {
+                    fn = exp.fixed_value();
                 }
                 if (!(fn instanceof AST_Defun || fn instanceof AST_Function)) break;
                 if (fn.rest) break;
                 if (fn.uses_arguments) break;
-                if (fn === call.expression) {
+                if (fn === exp) {
                     if (fn.parent_scope !== self) break;
                     if (!all(fn.enclosed, function(def) {
                         return def.scope !== self;
                     })) break;
                 }
-                if (fn.name
+                if ((fn !== exp || fn.name)
                     && (parent instanceof AST_ClassMethod || parent instanceof AST_ObjectMethod)
                     && parent.value === compressor.self()) break;
                 if (fn.contains_this()) break;
@@ -6321,7 +6324,7 @@ Compressor.prototype.compress = function(node) {
                         fn.argnames.push(fn.make_var(AST_SymbolFunarg, fn, "argument_" + len));
                     } while (++len < self.argnames.length);
                 }
-                return call.expression;
+                return exp;
             }
             break;
         }

test/compress/classes.js

@@ -3586,3 +3586,36 @@ issue_5531_3: {
     expect_stdout: "foo"
     node_version: ">=16"
 }
+
+issue_5662: {
+    options = {
+        inline: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(new (function() {
+            var g = function(a) {
+                return a;
+            };
+            return class {
+                h(b) {
+                    return g(b);
+                }
+            };
+        }())().h("PASS"));
+    }
+    expect: {
+        console.log(new (function() {
+            var g = function(a) {
+                return a;
+            };
+            return class {
+                h(b) {
+                    return g(b);
+                }
+            };
+        }())().h("PASS"));
+    }
+    expect_stdout: "PASS"
+    node_version: ">=6"
+}

test/reduce.js

@@ -466,7 +466,7 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
             }
         }
         else if (node instanceof U.AST_VarDef) {
-            if (node.value && !(parent instanceof U.AST_Const)) {
+            if (node.value && !(node.name instanceof U.AST_Destructured || parent instanceof U.AST_Const)) {
                 node.start._permute++;
                 CHANGED = true;
                 return new U.AST_VarDef({