When 'set debug expression 1' is used the debug code prints the full
contents of the expression 'elts' as a hex/ASCII dump. Unfortunately
this is a union so parts of it are potentially uninitialised.

This is not normally a problem (although displaying random data doesn't
sound like a good idea to me - especially for autotester etc.), but when
run under valgrind it causes a lot of output which hides the real problems.

The attached patch initialises the union before using it to ensure that
the whole thing is initialised. I suppose that it is not necessary to
initialise it in all the cases I have covered - the data fills the union
anyway, but it is safer this way and I imagine the compiler will do the
right thing in any case.

Tested with no regressions.

Andrew Stubbs

:ADDPATCH parse.c: