For each line in the line buffer for a CU, we need to check for the low address match to find the first line number.

要获得 CU 的行缓冲的每一行，我们需要检查低位地址匹配以找到函数的第一行的行号。

The line number of the start of this function in the source file.

函数在源文件中的起始行号。

Line number. The location where the error is thrown in the script.

Line number，脚本中抛出错误的位置。

When an assertion fails, the script name and line number will be output.

当assertion失败时，将会输出脚本名和行数。

The line number displayed may not always be where the actual error originated.

错误消息中显示的行号不一定是出现错误的实际位置。