I have read perlsyn - foreach, and I do not feel your quotation is relevant for the example I provided. Perhaps you intended it for BrowserUk as his post dealt with the modification of the VAR lvalue.

The relevant portion of the document for my example would be

If any part of LIST is an array, foreach will get very confused if you add or remove elements within the loop body, for example with splice. So don't do that.

I do not ever add or remove elements from LIST in actual code, but it serves as a possible example of iterating over an array - or perhaps an example of iterating over a lazily constructed list, as with for (1..99999999).