a confusing interaction of D, P and the no-symbol commodity

[simonmichael]

This is an unusual situation, but is there something better we should do here ?

D USD 1.00
P 2018/1/1 USD  2

2018/1/1
  (a)  1

$ hledger print -V
2018/01/01
    (a)        USD 2.00

Explanation:

• D assigns the USD commodity to the no-symbol a amount, making it USD 1
• P declares that 1 USD is worth two of the no-symbol commodity
• -V converts the USD 1 to no-symbol 2
• D assigns the USD commodity (again?), making it USD 2. Which is incorrect.

It seems like D is being applied a second time.

[simonmichael]

Current hledger behaves differently, valuation has no effect:

$ hledger print 
2018-01-01
    (a)        USD 1.00

$ hledger print -V
2018-01-01
    (a)        USD 1.00

$ hledger print -X ''
2018-01-01
    (a)        USD 1.00

I sort of expected to see

    (a)        2

(Apply USD as default commodity to get 1 USD; convert to value in default valuation commodity ("") to get 2.)