Found it! The problem was that, even though I'm over-riding things so that it is sending back the results of the loop rather than an actual file-system file, the file-system file has to exist and dancer needs to be able to access it. Rather than dropping a helpful error message along the lines of "file does not exist" it just gacked.

We're happy now...

In reply to Re^3: Streaming data using dancer by gsiems
in thread Streaming data using dancer by gsiems

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