exp: raise InvalidExpRefError properly

dvc/repo/experiments/__init__.py

@@ -22,6 +22,7 @@
     ExperimentExistsError,
     ExpRefInfo,
     ExpStashEntry,
+    InvalidExpRefError,
     MultipleBranchError,
 )
 from .executor.base import (
@@ -724,9 +725,12 @@ def get_exact_name(self, rev: str):
         exclude = f"{EXEC_NAMESPACE}/*"
         ref = self.scm.describe(rev, base=EXPS_NAMESPACE, exclude=exclude)
         if ref:
-            name = ExpRefInfo.from_ref(ref).name
-            if name:
-                return name
+            try:
+                name = ExpRefInfo.from_ref(ref).name
+                if name:
+                    return name
+            except InvalidExpRefError:
+                pass
         if rev in self.stash_revs:
             return self.stash_revs[rev].name
         return None

dvc/repo/experiments/base.py

@@ -135,7 +135,7 @@ def from_ref(cls, ref: str):
                 or len(parts) > 5
                 or "/".join(parts[:2]) != EXPS_NAMESPACE
             ):
-                InvalidExpRefError(ref)
+                raise InvalidExpRefError(ref)
         except ValueError:
             raise InvalidExpRefError(ref)
         baseline_sha = parts[2] + parts[3] if len(parts) >= 4 else None