From 33df81565fcee3c85afdf165e7fd11fa4ad68ef6 Mon Sep 17 00:00:00 2001
From: alexlamsl <alexlamsl@gmail.com>
Date: Mon, 17 Jun 2024 08:33:30 +0300
Subject: [PATCH] fix corner case in `inline`

fixes #5851
---
 lib/compress.js            |  4 ++-
 test/compress/functions.js | 54 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/lib/compress.js b/lib/compress.js
index 26dc1505dfd..33cbe574a64 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -10928,9 +10928,11 @@ Compressor.prototype.compress = function(node) {
                 && (value = can_flatten_body(stat))) {
                 var replacing = exp === fn || def.single_use && def.references.length - def.replaced == 1;
                 if (can_substitute_directly()) {
+                    self._optimized = true;
+                    var retValue = value.optimize(compressor).clone(true);
                     var args = self.args.slice();
                     var refs = [];
-                    var retValue = value.optimize(compressor).clone(true).transform(new TreeTransformer(function(node) {
+                    retValue = retValue.transform(new TreeTransformer(function(node) {
                         if (node instanceof AST_SymbolRef) {
                             var def = node.definition();
                             if (fn.variables.get(node.name) !== def) {
diff --git a/test/compress/functions.js b/test/compress/functions.js
index 53406b0d1fd..04c42031f30 100644
--- a/test/compress/functions.js
+++ b/test/compress/functions.js
@@ -8917,3 +8917,57 @@ issue_5841_2: {
         "foo",
     ]
 }
+
+issue_5851_1: {
+    options = {
+        inline: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        console.log("PASS") && f();
+        function f() {
+            return f();
+        }
+        f;
+    }
+    expect: {
+        console.log("PASS") && f();
+        function f() {
+            return f();
+        }
+        f;
+    }
+    expect_stdout: "PASS"
+}
+
+issue_5851_2: {
+    options = {
+        conditionals: true,
+        inline: true,
+        passes: 2,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a = f();
+        f();
+        function f() {
+            if (console.log("foo"))
+                console && f();
+        }
+    }
+    expect: {
+        f();
+        f();
+        function f() {
+            console.log("foo") && console && f();
+        }
+    }
+    expect_stdout: [
+        "foo",
+        "foo",
+    ]
+}