From:  Tom Tromey <>
Date:  14 Nov 2017 00:38:58 Hong Kong Time

Re: Getting line numbers from mappings


>>>>> "richard" == richard schneeman  writes:

>> The “mappings” data is broken down as follows: each group
>> representing a line in the generated file is separated by a ”;”

richard> Does this mean that the mapping should have the same number of
richard> semi-colons as lines and if it doesn't then it's a bug? Or are empty
richard> lines allowed to be omitted?

I think each line of the generated file has to be represented by a
group, because the generated line number is not explicit in the

richard> However it looks like coffeescript skips adding a mapping group
richard> for empty lines, so that technique is thrown off.

This sounds like a coffeescript bug.