Problem sending a Map over captp

This updoc fails (I get the same problem when not using updoc too):

?? in new vat A
? introducer.onTheAir()
? var x := null
? def sr := makeSturdyRef.temp(&x)
? <file:tmp>.setText(introducer.sturdyToURI(sr))

?? in new vat B
? introducer.onTheAir()
? def sr := introducer.sturdyFromURI(<file:tmp>.getText())
? def foo
? bind foo := ["a" => "b"]
? def done := sr.getRcvr()<-put(foo)
# value: <Promise>
? interp.waitAtTop(done)

?? in vat A
? E.toString(x)
# value: ["a" => "b"]


It prints:

updoc: started

at: <file:....updoc#:span::18:2::18:14>
expr: E.toString(x)
missing new value
original value: ["a" => "b"]
missing original problem
new problem: <NullPointerException>
#   # While printing an class org.erights.e.elib.tables.ConstMapImpl
#   - static E4E#toString(Object)
#   # Problem reporting
(org.erights.e.develop.exception.EBacktraceException: # While quoting
an class org.erights.e.elib.tables.ConstMapImpl)
#   @ toString/1: <file:...updoc#:span::18:4::18:11>
#   - EExpr#evalToPair(Scope)
#   . e`E.toString(x)`.evalToPair(<a Scope>)
#   @ evalToPair/1:
<file:.../e/src/esrc/org/erights/e/elang/cmd/cmdMakerMaker.emaker#:span::128:57::128:66>

If I call put(Ref.resolution(foo)) instead then it works as expected.

The immediate cause is that ConstMapImpl.myTable is null, but I think
this is due to the magic deserialisation code setting (or not setting)
the field directly. It doesn't seem to use the constructor, and the
field says:

    /**
     * This class should never be directly unserialized, so this instance
     * variable need not be declared serial.
     */
    private final transient FlexMap myTable;

But I don't know how captp works. Any suggestions?


-- 
Dr Thomas Leonard		ROX desktop / Zero Install
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