crash reporter: only show reporter once per exception groupid

- don't show crash reporter multiple times for the "same" exception
  - at least until the user restart the program (there is no persistence)
- this is a ~replacement for the removed "Never show crash reporter" option
- in case there e.g. a thread with timer spamming an exception erroneously,
  this ensures we only offer to send the crash report once (per process lifecycle)

electrum/base_crash_reporter.py

@@ -33,6 +33,7 @@ from . import constants
 from .i18n import _
 from .util import make_aiohttp_session, error_text_str_to_safe_str
 from .logging import describe_os_version, Logger, get_git_version
+from .crypto import sha256
 
 if TYPE_CHECKING:
     from .network import ProxySettings
@@ -140,6 +141,17 @@ class BaseCrashReporter(Logger):
             "id": _id,
         }
 
+    @classmethod
+    def get_traceback_groupid_hash(
+        cls,
+        exctype: type[BaseException],
+        excvalue: BaseException,
+        tb: TracebackType | None,
+    ) -> bytes:
+        tb_info = cls.get_traceback_info(exctype, excvalue, tb)
+        _id = tb_info["id"]
+        return sha256(str(_id))
+
     def get_additional_info(self):
         args = {
             "app_version": get_git_version() or ELECTRUM_VERSION,

electrum/gui/qml/qeapp.py

@@ -537,6 +537,7 @@ class Exception_Hook(QObject, Logger):
         Logger.__init__(self)
         assert self._INSTANCE is None, "Exception_Hook is supposed to be a singleton"
         self.wallet_types_seen = set()  # type: Set[str]
+        self.exception_ids_seen = set()  # type: Set[bytes]
 
         sys.excepthook = self.handler
         threading.excepthook = self.handler
@@ -554,4 +555,8 @@ class Exception_Hook(QObject, Logger):
 
     def handler(self, *exc_info):
         self.logger.error('exception caught by crash reporter', exc_info=exc_info)
+        groupid_hash = BaseCrashReporter.get_traceback_groupid_hash(*exc_info)
+        if groupid_hash in self.exception_ids_seen:
+            return  # to avoid annoying the user, only show crash reporter once per exception groupid
+        self.exception_ids_seen.add(groupid_hash)
         self._report_exception.emit(*exc_info)

electrum/gui/qt/exception_window.py

@@ -177,6 +177,7 @@ class Exception_Hook(QObject, Logger):
         assert self._INSTANCE is None, "Exception_Hook is supposed to be a singleton"
         self.config = config
         self.wallet_types_seen = set()  # type: Set[str]
+        self.exception_ids_seen = set()  # type: Set[bytes]
 
         sys.excepthook = self.handler
         self._report_exception.connect(_show_window)
@@ -191,6 +192,10 @@ class Exception_Hook(QObject, Logger):
 
     def handler(self, *exc_info):
         self.logger.error('exception caught by crash reporter', exc_info=exc_info)
+        groupid_hash = BaseCrashReporter.get_traceback_groupid_hash(*exc_info)
+        if groupid_hash in self.exception_ids_seen:
+            return  # to avoid annoying the user, only show crash reporter once per exception groupid
+        self.exception_ids_seen.add(groupid_hash)
         self._report_exception.emit(self.config, *exc_info)