no infinite loop on non global regex

index.js

@@ -53,6 +53,12 @@ function copy_object (obj) {
  * @param {any} func function to execute
  */
 function run_regex (regex, data, func) {
+  if (!regex.global) {
+    const result = regex.exec (data);
+    if (result)
+      func (result);
+    return;
+  }
   let res = regex.exec (data);
   while (res) {
     func (res);

test/index.js

@@ -48,6 +48,27 @@ test ('run regex', (t) => {
   util.run_regex (regex, data, (res) => {
     t.is (res[0], 'foo');
     count++;
-  })
+  });
   t.is (count, 2);
 });
+
+test ('run non-global regex', (t) => {
+  const data = 'foobarfoo';
+  const regex = /foo/u;
+  let count = 0;
+  util.run_regex (regex, data, (res) => {
+    t.is (res[0], 'foo');
+    count++;
+  });
+  t.is (count, 1);
+});
+
+test ('run non-global regex without result', (t) => {
+  const data = 'foobarfoo';
+  const regex = /baz/u;
+  let count = 0;
+  util.run_regex (regex, data, (res) => {
+    count++;
+  });
+  t.is (count, 0);
+});