Parse-print-reparse error with ranges

Contextual information: currently used versions

• Frama-C installation mode: Opam
• Frama-C version 26.0beta
• MetAcsl 0.4beta
• Alt-Ergo 2.3.2
• OS name: Ubuntu
• OS version: 20.04

The issue

On the attached file, after parsing and printing the code, running frama-c again to parse the code produces an error (due to missing parentheses in ranges).

f.c

Here is the example

// Run frama-c on this file and pretty-print it:
// frama-c f.c -print -no-unicode -ocode f_printed.c

// Run on the resulting pretty-printed file:
// frama-c f_printed.c


typedef unsigned char uchar;
typedef unsigned long ulong;
typedef unsigned char *pchar;
uchar *Ref;
uchar Array[100];
/*@ ghost ulong FCG_Var1[1000]; */

/*@ ensures
      sep1:
        \let Ref_range = Ref + (0 .. (1 << (size)) - 1);
        \let PROP = \forall integer MyNum; 
          \let myrange = (0 .. (6 - 1));
          \let Var2 = &Array[FCG_Var1[MyNum]];
          \let CASE_i = 0 <= MyNum < 10;
          \let PROP_i =
            \separated(Ref_range, Var2 + myrange);
            CASE_i ==> PROP_i;
          PROP;
 */
static uchar myfun(pchar p_array, short index, uchar size)
{
  uchar __retres;
  return __retres;
}

Here is the error message:

[kernel] Parsing f_printed.c (with preprocessing)
[kernel:annot-error] f_printed.c:11: Warning: unexpected token '..'
[kernel] User Error: warning annot-error treated as fatal error.
[kernel] User Error: stopping on file "f_printed.c" that has errors. Add '-kernel-msg-key pp'
  for preprocessing command.
[kernel] Frama-C aborted: invalid user input.