fix: Guard against more alias resolution errors

Issue #83: #83
PR #103: #103

src/griffe/dataclasses.py

@@ -885,7 +885,7 @@ def parent(self) -> Module | Class | None:
     def parent(self, value: Module | Class) -> None:
         self._parent = value
         if self.resolved:
-            with suppress(AliasResolutionError):
+            with suppress(AliasResolutionError, CyclicAliasError):
                 self._target.aliases[self.path] = self  # type: ignore[union-attr]  # we just checked the target is not None
 
     @cached_property
@@ -923,7 +923,7 @@ def target(self) -> Object | Alias:
 
     @target.setter
     def target(self, value: Object | Alias) -> None:
-        if value is self:
+        if value is self or value.path == self.path:
             raise CyclicAliasError([self.target_path])
         self._target = value
         self.target_path = value.path
@@ -958,7 +958,7 @@ def resolved(self) -> bool:
         Returns:
             True or False.
         """
-        return self._target is not None
+        return self._target is not None and (not self._target.is_alias or self._target.resolved)  # type: ignore[union-attr]
 
     @cached_property
     def wildcard(self) -> str | None:

src/griffe/mixins.py

@@ -6,6 +6,7 @@
 from contextlib import suppress
 from typing import Any, Sequence, Type, TypeVar
 
+from griffe.exceptions import AliasResolutionError, CyclicAliasError
 from griffe.logger import get_logger
 from griffe.merger import merge_stubs
 
@@ -69,11 +70,15 @@ def __setitem__(self, key: str | Sequence[str], value) -> None:  # noqa: WPS231
                     # when reassigning a module to an existing one,
                     # try to merge them as one regular and one stubs module
                     # (implicit support for .pyi modules)
-                    if member.is_module and value.is_module:
-                        with suppress(ValueError):
-                            value = merge_stubs(member, value)
+                    if member.is_module:
+                        with suppress(AliasResolutionError, CyclicAliasError):
+                            if value.is_module:
+                                logger.debug(f"Trying to merge {member.filepath} and {value.filepath}")
+                                with suppress(ValueError):
+                                    value = merge_stubs(member, value)
                     for alias in member.aliases.values():
-                        alias.target = value
+                        with suppress(CyclicAliasError):
+                            alias.target = value
             self.members[name] = value  # type: ignore[attr-defined]
             if self.is_collection:  # type: ignore[attr-defined]
                 value._modules_collection = self  # noqa: WPS437