Avoid undefined behavior from reading uninitialized data

rust-lang · Apr 15, 2016 · 62cedef · 62cedef
1 parent 2ab7be3
commit 62cedef
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/regex_macros/src/lib.rs b/regex_macros/src/lib.rs
@@ -309,7 +309,7 @@ fn exec<'t>(
 
         #[inline]
         fn contains(&self, pc: usize) -> bool {
-            let s = self.sparse[pc];
+            let s = unsafe { ::std::ptr::read_volatile(&self.sparse[pc]) };
             s < self.size && self.dense[s].pc == pc
         }