Allow catching as ParseError "Non-abstract method C::foo() must contain a body"

Description

Since PHP 7 it is possible to catch syntax errors in PHP files during inclusion, which is a very nice feature, such as:

try {
  eval("class C { function foo() }");
}
catch (\Throwable $e) {
  print "CAUGHT [" . get_class($e) . "]: " . $e->getMessage() . "\n";
}
// prints: CAUGHT [ParseError]: syntax error, unexpected token "}", expecting ";" or "{"
// execution continues

Unfortunately, the same is not possible in case the error is a non-abstract method without body:

try {
  eval("class C { function foo(); }");
}
catch (\Throwable $e) {
  print "CAUGHT [" . get_class($e) . "]: " . $e->getMessage() . "\n";
}
// prints: Fatal error: Non-abstract method C::foo() must contain body in /in/YY0Wu(13) : eval()'d code on line 1
// execution terminates

Would it be possible to implement a throw also for this case?

https://3v4l.org/YY0Wu

从 PHP 解释器中的 eval() 路径开始，比较所示语法错误如何变成 ParseError，以及非 abstract 方法检查当前如何终止执行。使用 issue 中的两个 eval() 示例作为 reproducer；当第二种情况可以作为 ParseError 捕获且执行继续时，即表示完成。