From fc58c88ab5f856a302996effed074de1ff0e11b6 Mon Sep 17 00:00:00 2001
From: Marcus Ramse <marcus@ramse.se>
Date: Tue, 3 Dec 2024 20:12:03 +0000
Subject: [PATCH] web: safely handle immutable globals (#779)

---
 runtimes/web/src/netplay/index.ts | 4 ++--
 runtimes/web/src/state.ts         | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/runtimes/web/src/netplay/index.ts b/runtimes/web/src/netplay/index.ts
index bf7b45bb..a619bdd6 100644
--- a/runtimes/web/src/netplay/index.ts
+++ b/runtimes/web/src/netplay/index.ts
@@ -252,10 +252,10 @@ export class Netplay {
         const localPeerId = await this.peerMgr.localPeerId;
 
         const loc = window.location;
-        if (loc.protocol == "file:"
+        if (!DEV_NETPLAY && (loc.protocol == "file:"
             || loc.hostname == "localhost"
             || loc.hostname == "127.0.0.1"
-            || loc.hostname == "wasm4.org") {
+            || loc.hostname == "wasm4.org")) {
             return `https://wasm4.org/netplay/#${localPeerId}`;
         }
         const url = new URL(loc.href);
diff --git a/runtimes/web/src/state.ts b/runtimes/web/src/state.ts
index 91bfd96d..656ee1b9 100644
--- a/runtimes/web/src/state.ts
+++ b/runtimes/web/src/state.ts
@@ -38,7 +38,10 @@ export class State {
         for (const exName in runtime.wasm!.exports) {
             const exInst = runtime.wasm!.exports[exName]
             if (exInst instanceof WebAssembly.Global && exName in this.globals) {
-                exInst.value = this.globals[exName];
+                try {
+                    // this will fail for immutable globals that have been exported, but is safe
+                    exInst.value = this.globals[exName];
+                } catch {}
             }
         }