Visidata: Failure reading stdin (piping to vd)

[ajkerrigan]

Small description
In v2.-1 I was able to pipe command output to vd and get a sheet. With the current develop branch (37acde0bb9a0b758d664341c835b4a13de0a2a08), I get no data.

Expected result
Piping something like a directory list to VisiData, I expect to see a sheet with the data:

ls -l | vd -f fixed

Actual result with screenshot
I get no error, but vd stops after showing:

- does not exist, creating new sheet

Steps to reproduce with sample data and a .vd
This small test script should exit with 0 if things are working, and 1 otherwise. Using it with git bisect suggests the issue traces back to 4f7f82cf4f1d4d278c51a9bfc00ad3514b69b8ef:

#!/bin/bash
VALUE=$(echo "hi" | ./bin/vd -bo -)
[[ "$VALUE" == "hi" ]] && exit 0
exit 1

[saulpw]

A model bug report, @ajkerrigan! concise and informative, which made it easy to fix. Should be fixed in 2.-2.