fix corner case in inline (#3853)

fixes #3852

test/compress/drop-unused.js

@@ -2366,7 +2366,7 @@ function_parameter_ie8: {
     }
     expect: {
         (function() {
-            (function f() {
+            (function() {
                 console.log("PASS");
             })();
         })();

test/compress/functions.js

@@ -4660,3 +4660,24 @@ issue_3836: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3852: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            return function(b) {
+                return b && (b[0] = 0), "PASS";
+            }(a);
+        }(42));
+    }
+    expect: {
+        console.log(function(a) {
+            return a && (a[0] = 0), "PASS";
+        }(42));
+    }
+    expect_stdout: "PASS"
+}

test/compress/ie8.js

@@ -2389,7 +2389,7 @@ issue_3703: {
         var a = "PASS";
         (function() {
             var b;
-            var c = function g() {
+            var c = function() {
                 a = "FAIL";
             };
             a ? b |= c : b.p;