Fixed issue with offset fields not removing keep_pos flag

---

+ bumped to version 1.0.0-b3

caterpillar/__init__.py

@@ -13,6 +13,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-__version__ = "1.0.0-b1"
+__version__ = "1.0.0-b3"
 __release__ = None
 __author__ = "MatrixEditor"

caterpillar/fields/_base.py

@@ -203,8 +203,12 @@ def __matmul__(self, offset: Union[_ContextLambda, int]) -> Self:
         self.offset = offset
         # This operation automatically removes the "keep_position"
         # flag. It has to be set manually.
-        if self.offset != -1:
-            self.flags.pop(F_KEEP_POSITION, None)
+        # NOTE: The check does not need to be done if the given value
+        # is a context lambda. Otherwise it would add the __ne__ operation
+        # to the context lambda, which would be an unintended side effect.
+        if isinstance(self.offset, int) and self.offset != -1:
+            # pylint: disable-next=protected-access
+            self.flags.pop(F_KEEP_POSITION._hash_, None)
         return self
 
     def __getitem__(self, dim: Union[_ContextLambda, int, _GreedyType]) -> Self:

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 # requires-python = ">= 3.12"
 name = "caterpillar"
-version = "1.0.0-b2"
+version = "1.0.0-b3"
 
 description="Library to pack and unpack structurized binary data."
 authors = [