[napi] Don't assume `function` exists

Fixes https://github.com/oven-sh/bun/issues/1808

1 files changed, 4 insertions, 1 deletions

diff --git a/src/bun.js/base.zig b/src/bun.js/base.zig
index ecee2ff3d..79498b8fc 100644
--- a/src/bun.js/base.zig
+++ b/src/bun.js/base.zig
@@ -2058,7 +2058,10 @@ pub const ExternalBuffer = struct {
 };
 pub export fn ExternalBuffer_deallocator(bytes_: *anyopaque, ctx: *anyopaque) callconv(.C) void {
     var external: *ExternalBuffer = bun.cast(*ExternalBuffer, ctx);
-    external.function.?(external.global, external.ctx, bytes_);
+    if (external.function) |function| {
+        function(external.global, external.ctx, bytes_);
+    }
+
     const allocator = external.allocator;
     allocator.destroy(external);
 }