Cpp tests failing betr branch

[JackMenandCameron]

Betr branch is failing on the following tests

Failed Tests (4):
Dafny :: c++/class.dfy
Dafny :: c++/datatypes.dfy
Dafny :: c++/generic.dfy
Dafny :: c++/maps.dfy

Reasons

Type inference

Maps.dfy is not verifying correctly.

(114,24): Error: value does not satisfy the subset constraints of 'map<MyClass, uint32>'
Execution trace:
    (0,0): anon0

I am not sure but this seems to be an error in inferring the type. If the type is explicitly stated as
map<MyClass?, uint32> then the file verifies (this also works on main though it is not necessary).

Null vs NULL vs Nil vs 0 vs 0x0 vs .....

Seems that dafny stopped printing null values as 0 and now prints them as 0x0?

-jack wendy 0
-jack 0 0
+jack wendy 0x0
+jack 0x0 0x0
 ronald ronald 0
 1 1 1 0
-jack wendy 0
-jack 0 0
+jack wendy 0x0
+jack 0x0 0x0

This is also an issue at dafny-lang/dafny.

[parno]

The NULL issue is on track to be fixed in official Dafny: dafny-lang#1242

I'm not sure why type inference is behaving differently here. For now, I'm tempted to say that we should just add the explicit type annotation.