Fix for https://crbug.com/988024.

--- src/util/profile/prof_parse.c
+++ src/util/profile/prof_parse.c
@@ -50,6 +50,8 @@ static void parse_quoted_string(char *str)
     for (to = from = str; *from && *from != '"'; to++, from++) {
         if (*from == '\\') {
             from++;
+            if (!*from)
+                break;
             switch (*from) {
             case 'n':
                 *to = '\n';