drop argument value after collapse_vars (#2190)

test/compress/collapse_vars.js

@@ -2187,7 +2187,7 @@ compound_assignment: {
     expect_stdout: "4"
 }
 
-issue_2187: {
+issue_2187_1: {
     options = {
         collapse_vars: true,
         unused: true,
@@ -2217,3 +2217,42 @@ issue_2187: {
         "2",
     ]
 }
+
+issue_2187_2: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var b = 1;
+        console.log(function(a) {
+            return a && ++b;
+        }(b--));
+    }
+    expect: {
+        var b = 1;
+        console.log(function(a) {
+            return b-- && ++b;
+        }());
+    }
+    expect_stdout: "1"
+}
+
+issue_2187_3: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        unused: true,
+    }
+    input: {
+        var b = 1;
+        console.log(function(a) {
+            return a && ++b;
+        }(b--));
+    }
+    expect: {
+        var b = 1;
+        console.log(b-- && ++b);
+    }
+    expect_stdout: "1"
+}

test/compress/drop-unused.js

@@ -1113,7 +1113,7 @@ issue_2105: {
     options = {
         collapse_vars: true,
         inline: true,
-        passes: 2,
+        passes: 3,
         reduce_vars: true,
         side_effects: true,
         unused: true,