fix `inline` of `catch`-scoped variables (#3077)

fixes #3076

diff --git a/lib/compress.js b/lib/compress.js
index 454ce94..999e03c 100644 (file)
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4841,6 +4841,11 @@ merge(Compressor.prototype, {
                 for (var j = 0, defs = stat.definitions.length; j < defs; j++) {
                     var var_def = stat.definitions[j];
                     var name = var_def.name;
+                    var redef = name.definition().redefined();
+                    if (redef) {
+                        name = name.clone();
+                        name.thedef = redef;
+                    }
                     append_var(decls, expressions, name, var_def.value);
                     if (in_loop && all(fn.argnames, function(argname) {
                         return argname.name != name.name;

diff --git a/test/compress/functions.js b/test/compress/functions.js
index 471ebf7..650254f 100644 (file)
--- a/test/compress/functions.js
+++ b/test/compress/functions.js
@@ -2267,3 +2267,39 @@ issue_3054: {
     }
     expect_stdout: "true true"
 }
+
+issue_3076: {
+    options = {
+        dead_code: true,
+        inline: true,
+        sequences: true,
+        unused: true,
+    }
+    input: {
+        var c = "PASS";
+        (function(b) {
+            var n = 2;
+            while (--b + function() {
+                e && (c = "FAIL");
+                e = 5;
+                return 1;
+                try {
+                    var a = 5;
+                } catch (e) {
+                    var e;
+                }
+            }().toString() && --n > 0);
+        })(2);
+        console.log(c);
+    }
+    expect: {
+        var c = "PASS";
+        (function(b) {
+            var n = 2;
+            while (--b + (e = void 0, e && (c = "FAIL"), e = 5, 1).toString() && --n > 0);
+            var e;
+        })(2),
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}