void
fatal(const char* format, va_list) ATTRIBUTE_NORETURN;
+ // Report a fallback error. After printing the error, this must exit
+ // with a special status code indicating that fallback to
+ // --incremental-full is required.
+ void
+ fallback(const char* format, va_list) ATTRIBUTE_NORETURN;
+
// Report an error and continue.
void
error(const char* format, va_list);