fix corner case in `dead_code` (#4304)

2 files changed, 37 insertions, 0 deletions

diff --git a/test/compress/const.js b/test/compress/const.js
index 0f5e3fdd..7e393d4f 100644
--- a/test/compress/const.js
+++ b/test/compress/const.js
@@ -57,6 +57,23 @@ retain_block: {
     expect_stdout: true
 }
 
+retain_catch: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        try {} catch (a) {
+            const a = "aa";
+        }
+    }
+    expect: {
+        try {} catch (a) {
+            const a = "aa";
+        }
+    }
+    expect_stdout: true
+}
+
 if_dead_branch: {
     options = {
         conditionals: true,
diff --git a/test/compress/let.js b/test/compress/let.js
index 0476c431..0669b36f 100644
--- a/test/compress/let.js
+++ b/test/compress/let.js
@@ -20,6 +20,26 @@ retain_block: {
     node_version: ">=4"
 }
 
+retain_catch: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        "use strict";
+        try {} catch (a) {
+            let a = "aa";
+        }
+    }
+    expect: {
+        "use strict";
+        try {} catch (a) {
+            let a = "aa";
+        }
+    }
+    expect_stdout: true
+    node_version: ">=4"
+}
+
 if_dead_branch: {
     options = {
         conditionals: true,