Index: compiled/String.h
===================================================================
--- a/compiled/String.h
+++ b/compiled/String.h
@@ -260,17 +260,17 @@
 inline DependentString operator "" _str(const String::value_type* str,
     String::size_type len)
 {
   return DependentString(str, len);
 }
 
 inline void String_assert_writable(bool isWritable)
 {
-  assert(isWritable, u"Writing access to a read-only string"_str);
+  assert2(isWritable, u"Writing access to a read-only string"_str);
 }
 
 class OwnedString : public String
 {
 private:
   void grow(size_type additionalSize)
   {
     OwnedString newValue(length() + additionalSize);
@@ -343,28 +343,28 @@
     return *this;
   }
 
   void append(const value_type* source, size_type sourceLen)
   {
     if (!sourceLen)
       return;
 
-    assert(source, u"Null buffer passed to OwnedString.append()"_str);
+    assert2(source, u"Null buffer passed to OwnedString.append()"_str);
     size_t oldLength = length();
     grow(sourceLen);
     std::memcpy(mBuf + oldLength, source, sizeof(value_type) * sourceLen);
   }
 
   void append(const char* source, size_type sourceLen)
   {
     if (!sourceLen)
       return;
 
-    assert(source, u"Null buffer passed to OwnedString.append()"_str);
+    assert2(source, u"Null buffer passed to OwnedString.append()"_str);
     size_t oldLength = length();
     grow(sourceLen);
     for (size_t i = 0; i < sourceLen; i++)
       mBuf[oldLength + i] = source[i];
   }
 
   void append(const String& str)
   {