ACSL typing fails when performing unification of type variables

ID0002170: This issue was created automatically from Mantis Issue 2170. Further discussion may take place here.

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Id	Project	Category	View	Due Date	Updated
ID0002170	Frama-C	Kernel > ACSL implementation	public	2015-09-24	2015-09-24

Reporter	patrick	Assigned To	virgile	Resolution	open
Priority	normal	Severity	minor	Reproducibility	always
Platform	-	OS	-	OS Version	-
Product Version	-	Target Version	-	Fixed in Version	-

Description :

Frama-C fails while typing the given ACSL axiomatic.

Additional Information :

Typing is succesful when axiom "a" is replaced by: @ axiom a: P(aList,Nil);

Steps To Reproduce :

> cat list.i
//@ type List<A> = Nil | Cons(A,List<A>);

/*@ axiomatic L {
  @   predicate P<B>(List<B> l1, List<B> l2);
  @   logic List<integer> aList{L} ;
  @   axiom a: P(Nil, aList);
  @ }
  @*/
> frama-c list.i
...
../tests/list.i:8:[kernel] user error: invalid implicit conversion from ℤ to A#4