From 4680e89a915f5a6aee4ebb3fde794792bd48f69b Mon Sep 17 00:00:00 2001
From: robobun <robobun@oven.sh>
Date: Fri, 23 Jan 2026 23:09:01 -0800
Subject: [PATCH] fix(bundler): add missing semicolons in minified bun module
 imports (#26372)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Summary
- Fix missing semicolons in minified output when using both default and
named imports from `"bun"` module
- The issue occurred in `printInternalBunImport` when transitioning
between star_name, default_name, and items sections without flushing
pending semicolons

## Test plan
- Added regression tests in `test/regression/issue/26371.test.ts`
covering:
  - Default + named imports (`import bun, { embeddedFiles } from "bun"`)
- Namespace + named imports (`import * as bun from "bun"; import {
embeddedFiles } from "bun"`)
  - Namespace + default + named imports combination
- Verified test fails with `USE_SYSTEM_BUN=1` (reproduces bug)
- Verified test passes with `bun bd test` (fix works)

Fixes #26371

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
---
 src/js_printer.zig                  |  2 +
 test/bundler/bundler_minify.test.ts | 63 +++++++++++++++++++++++++++--
 2 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/src/js_printer.zig b/src/js_printer.zig
index 9ba58ad1c5..0431180838 100644
--- a/src/js_printer.zig
+++ b/src/js_printer.zig
@@ -964,6 +964,7 @@ fn NewPrinter(
             }
 
             if (import.default_name) |default| {
+                p.printSemicolonIfNeeded();
                 p.print("var ");
                 p.printSymbol(default.ref.?);
                 if (comptime Statement == void) {
@@ -984,6 +985,7 @@ fn NewPrinter(
             }
 
             if (import.items.len > 0) {
+                p.printSemicolonIfNeeded();
                 p.printWhitespacer(ws("var {"));
 
                 if (!import.is_single_line) {
diff --git a/test/bundler/bundler_minify.test.ts b/test/bundler/bundler_minify.test.ts
index 0865d9a372..66fa487207 100644
--- a/test/bundler/bundler_minify.test.ts
+++ b/test/bundler/bundler_minify.test.ts
@@ -1109,15 +1109,15 @@ describe("bundler", () => {
       "/entry.js": /* js */ `
         // Test all equality operators with typeof undefined
         console.log(typeof x !== 'undefined');
-        console.log(typeof x != 'undefined'); 
+        console.log(typeof x != 'undefined');
         console.log('undefined' !== typeof x);
         console.log('undefined' != typeof x);
-        
+
         console.log(typeof x === 'undefined');
         console.log(typeof x == 'undefined');
         console.log('undefined' === typeof x);
         console.log('undefined' == typeof x);
-        
+
         // These should not be optimized
         console.log(typeof x === 'string');
         console.log(x === 'undefined');
@@ -1135,4 +1135,61 @@ describe("bundler", () => {
       );
     },
   });
+
+  // https://github.com/oven-sh/bun/issues/26371
+  // Minified bundler output missing semicolon between statements when
+  // using both default and named imports from "bun" module
+  itBundled("minify/BunImportSemicolonInsertion", {
+    files: {
+      "/entry.js": /* js */ `
+        import bun, { embeddedFiles } from "bun"
+        console.log(typeof embeddedFiles)
+        console.log(typeof bun.argv)
+      `,
+    },
+    minifySyntax: true,
+    minifyWhitespace: true,
+    minifyIdentifiers: true,
+    target: "bun",
+    run: {
+      stdout: "object\nobject",
+    },
+  });
+
+  itBundled("minify/BunImportNamespaceAndNamed", {
+    files: {
+      "/entry.js": /* js */ `
+        import * as bun from "bun"
+        import { embeddedFiles } from "bun"
+        console.log(typeof embeddedFiles)
+        console.log(typeof bun.argv)
+      `,
+    },
+    minifySyntax: true,
+    minifyWhitespace: true,
+    minifyIdentifiers: true,
+    target: "bun",
+    run: {
+      stdout: "object\nobject",
+    },
+  });
+
+  itBundled("minify/BunImportDefaultNamespaceAndNamed", {
+    files: {
+      "/entry.js": /* js */ `
+        import bun, * as bunNs from "bun"
+        import { embeddedFiles } from "bun"
+        console.log(typeof embeddedFiles)
+        console.log(typeof bun.argv)
+        console.log(typeof bunNs.argv)
+      `,
+    },
+    minifySyntax: true,
+    minifyWhitespace: true,
+    minifyIdentifiers: true,
+    target: "bun",
+    run: {
+      stdout: "object\nobject\nobject",
+    },
+  });
 });