A value-less, untyped variable has always been converted to an empty
string. The intention was that value-less, typed variables convert to a
typed null, which was even specified in a code comment, but was never
actually implemented.
This resulted in a null value with a nil type. A value with a nil type
cannot be coerced ("unified") with any other standard types. When this
mismatch occurs, HCL attempts to return a diagnostic error, which in
turn panics as the nil type is literally a nil pointer.
Signed-off-by: Roberto Villarreal <rrjjvv@yahoo.com>
Roberto Villarreal
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