unexpected end of json input while trying to view summary view from record list can anyone explain why it has occured

I recently ran into this error and found this thread as a result. I was able to resolve the issue after a bit of messing around with the code and narrow it down to the fv!identifier variable. Here was my scenario: My task was to create a bulleted list using a forEach loop with a record link to the summary view in each bullet point. To make things more complex, this forEach loop had to go inside an already existing forEach loop with a local variable that indexed indexed out the items for the child forEach loop. We'll call this local variable local!items. The code looked something like this: 

a!richTextBulletedList(
items: a!forEach(
local!items,         /* local!items is a list of record types indexed out of the results of a record query */
a!richTextItem(
text: "Text to display",
link:
a!recordLink(
recordType: "recordType",
identifier: fv!identifier
)
)
)
)

My best guess is that the record link didn't like fv!identifier since it didn't know exactly what the unique identifier was since it was a local variable. The resolution simply involved changing fv!identifier to fv!item[recordType.ID] since this manually specifies the unique identifier for each iteration in the loop.