From 5da3aaaabf93939d1f0893c1aff240a6c9634ca3 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Fri, 21 Feb 2020 15:21:25 -0500
Subject: [PATCH] Properly test for WebAssembly presence before use

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/900
---
 src/js/strie.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/js/strie.js b/src/js/strie.js
index 5243ebb83..99b8a9adc 100644
--- a/src/js/strie.js
+++ b/src/js/strie.js
@@ -679,6 +679,7 @@ const roundToPageSize = v => (v + PAGE_SIZE-1) & ~(PAGE_SIZE-1);
     }
 
     async enableWASM() {
+        if ( typeof WebAssembly !== 'object' ) { return false; }
         if ( this.wasmMemory instanceof WebAssembly.Memory ) { return true; }
         const module = await getWasmModule();
         if ( module instanceof WebAssembly.Module === false ) {