fuzz: Add option to ignore errors

Author: chfast

test/fuzzer/parser_fuzzer.cpp

@@ -3,6 +3,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #include "parser.hpp"
+#include <cstdlib>
 #include <iomanip>
 #include <iostream>
 
@@ -36,7 +37,14 @@ Stats stats;
 
 void handle_unexpected_errors() noexcept
 {
-    __builtin_trap();
+    static const bool ignore_errors = [] {
+        const auto options = std::getenv("OPTIONS");
+        if (!options)
+            return false;
+        return std::string{options}.find("ignore_errors") != std::string::npos;
+    }();
+    if (!ignore_errors)
+        __builtin_trap();
 }
 
 constexpr auto wabt_ignored_errors = {