buffers/search: fix handling malformed queries

2 files changed, 12 insertions, 5 deletions

diff --git a/alot/db/errors.py b/alot/db/errors.py
index bd2564f9..d5fd9f9a 100644
--- a/alot/db/errors.py
+++ b/alot/db/errors.py
@@ -12,6 +12,10 @@ class DatabaseROError(DatabaseError):
     """cannot write to read-only database"""
     pass
 
+class QueryError(DatabaseError):
+    """malformed query"""
+    pass
+
 
 class NonexistantObjectError(DatabaseError):
 
diff --git a/alot/db/manager.py b/alot/db/manager.py
index e57af181..aa67ed40 100644
--- a/alot/db/manager.py
+++ b/alot/db/manager.py
@@ -11,9 +11,8 @@ import os
 
 from notmuch2 import Database, NotmuchError
 
-from .errors import DatabaseError
-from .errors import DatabaseROError
-from .errors import NonexistantObjectError
+from .errors import (DatabaseError, DatabaseROError, NonexistantObjectError,
+                     QueryError)
 from .sort   import ORDER
 from .thread import Thread
 from ..settings.const import settings
@@ -214,8 +213,12 @@ class DBManager:
         with self._db_ro() as db:
             exclude_tags = self._exclude_tags | exclude_tags
 
-            for t in db.threads(querystring, sort = sort, exclude_tags = exclude_tags):
-                yield t.threadid
+            try:
+                for t in db.threads(querystring, sort = sort,
+                                    exclude_tags = exclude_tags):
+                    yield t.threadid
+            except NotmuchError as e:
+                raise QueryError from e
 
     async def startup(self):
         self._write_queue = asyncio.Queue()