Bug with nested conditional tags

Simpliest example of problem (on clean modx 2.5.5):



Outputs: index `]]

If there are two identical tags ([[*alias]] in example) in nested conditional tags parser produce weird output.
It can be solved by moving part of code to another Chunk to avoid identical tags in one code but I think there are some problems in parser.

Tested on php 5.3 and 7

The parser sometimes has trouble with modifiers that have a 'then' clause with no 'else'. That could be the problem, or you could be right that it's the nesting. Output modifiers aren't really intended to solve problems that involve complex decision-making.

If I'm reading your code correctly and it worked as it should, the alias would be displayed twice if you're on the home page and it's published. Is that really what you want?

Since the Home page would always be published and its pagetitle would be Home (right?) the inner part seems unnecessary, but maybe I'm missing something.

Your code would probably work, and produce the same result if you did this:



I was going to offer a simple snippet that would do the job much faster than nested conditional output modifiers, but I can't tell for sure what you're trying to accomplish.

Thanks for your answer.

Example code is just demonstration.
We faced this problem in more complex situation.
I simplified it to find the cause.
In fact there is no matter what is in conditions, problem is in duplicate variables with nesting. If I change one [[*alias]] to something other it will output 'index something' as expected.

I understand how we should avoid it, thanks, just wanted to report it.

Read my issue.

https://github.com/modxcms/revolution/issues/13308

Good detective work on the duplicate placeholder. Thanks for reporting it.

I would have thought the parser would replace all simple resource content tags on the first pass.