From f6703205e93bead9e9a2f74e43059d75c19914c0 Mon Sep 17 00:00:00 2001
From: George Alexopoulos <grgalex42@gmail.com>
Date: Thu, 25 Sep 2025 20:15:10 +0300
Subject: [PATCH] Ensure env is open in env.openDbi()

---
 src/env.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/env.cpp b/src/env.cpp
index 9c5cfb87c0..ff71403bbb 100644
--- a/src/env.cpp
+++ b/src/env.cpp
@@ -592,6 +592,16 @@ NAN_METHOD(EnvWrap::openDbi) {
 
     const unsigned argc = 2;
     Local<Value> argv[argc] = { info.This(), info[0] };
+    
+    // Ensure env has been opened.
+    // A hacky way to do that, it to check whether me_path has been set.
+    EnvWrap *ew = Nan::ObjectWrap::Unwrap<EnvWrap>(info.This());
+    const char* path = nullptr;
+    int rc = mdb_env_get_path(ew->env, &path);
+    if (path == nullptr) {
+        return Nan::ThrowError("The environment is not open.");
+    }
+    
     Nan::MaybeLocal<Object> maybeInstance = Nan::NewInstance(Nan::New(*dbiCtor), argc, argv);
 
     // Check if database could be opened