Added fail-save

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -1530,7 +1530,8 @@ public class HtmlHelper {
                     }
 
                     Matcher matcher = pattern.matcher(text);
-                    if (matcher.find()) {
+                    if (matcher.find())
+                        try {
                             Element span = document.createElement("span");
 
                             int pos = 0;
@@ -1548,6 +1549,12 @@ public class HtmlHelper {
                                 String group = matcher.group();
                                 int start = matcher.start();
                                 int end = matcher.end();
+                                if (start < pos || start > end) {
+                                    Log.e("Autolink pos=" + pos +
+                                            " start=" + start + " end=" + end +
+                                            " len=" + group.length() + "/" + text.length());
+                                    return;
+                                }
 
                                 // Workarounds
                                 if (group.endsWith(".")) {
@@ -1605,6 +1612,8 @@ public class HtmlHelper {
 
                             tnode.before(span);
                             tnode.text("");
+                        } catch (Throwable ex) {
+                            Log.e(ex);
                         }
                 }
             }