nodes: apply same traceback filtering for chained exceptions as main exception

Fix #1904.

changelog/1904.bugfix.rst

@@ -0,0 +1 @@
+Fixed traceback entries hidden with ``__tracebackhide__ = True`` still being shown for chained exceptions (parts after "... the above exception ..." message).

src/_pytest/_code/code.py

@@ -635,7 +635,9 @@ class ExceptionInfo(Generic[E]):
         showlocals: bool = False,
         style: "_TracebackStyle" = "long",
         abspath: bool = False,
-        tbfilter: bool = True,
+        tbfilter: Union[
+            bool, Callable[["ExceptionInfo[BaseException]"], Traceback]
+        ] = True,
         funcargs: bool = False,
         truncate_locals: bool = True,
         chain: bool = True,
@@ -652,9 +654,15 @@ class ExceptionInfo(Generic[E]):
         :param bool abspath:
             If paths should be changed to absolute or left unchanged.
 
-        :param bool tbfilter:
+        :param tbfilter:
-            Hide entries that contain a local variable ``__tracebackhide__==True``.
+            A filter for traceback entries.
-            Ignored if ``style=="native"``.
+
+            * If false, don't hide any entries.
+            * If true, hide internal entries and entries that contain a local
+              variable ``__tracebackhide__ = True``.
+            * If a callable, delegates the filtering to the callable.
+
+            Ignored if ``style`` is ``"native"``.
 
         :param bool funcargs:
             Show fixtures ("funcargs" for legacy purposes) per traceback entry.
@@ -719,7 +727,7 @@ class FormattedExcinfo:
     showlocals: bool = False
     style: "_TracebackStyle" = "long"
     abspath: bool = True
-    tbfilter: bool = True
+    tbfilter: Union[bool, Callable[[ExceptionInfo[BaseException]], Traceback]] = True
     funcargs: bool = False
     truncate_locals: bool = True
     chain: bool = True
@@ -881,7 +889,9 @@ class FormattedExcinfo:
 
     def repr_traceback(self, excinfo: ExceptionInfo[BaseException]) -> "ReprTraceback":
         traceback = excinfo.traceback
-        if self.tbfilter:
+        if callable(self.tbfilter):
+            traceback = self.tbfilter(excinfo)
+        elif self.tbfilter:
             traceback = traceback.filter(excinfo)
 
         if isinstance(excinfo.value, RecursionError):

src/_pytest/nodes.py

@@ -450,10 +450,13 @@ class Node(metaclass=NodeMeta):
                 style = "value"
         if isinstance(excinfo.value, FixtureLookupError):
             return excinfo.value.formatrepr()
+
+        tbfilter: Union[bool, Callable[[ExceptionInfo[BaseException]], Traceback]]
         if self.config.getoption("fulltrace", False):
             style = "long"
+            tbfilter = False
         else:
-            excinfo.traceback = self._traceback_filter(excinfo)
+            tbfilter = self._traceback_filter
             if style == "auto":
                 style = "long"
         # XXX should excinfo.getrepr record all data and toterminal() process it?
@@ -484,7 +487,7 @@ class Node(metaclass=NodeMeta):
             abspath=abspath,
             showlocals=self.config.getoption("showlocals", False),
             style=style,
-            tbfilter=False,  # pruned already, or in --fulltrace mode.
+            tbfilter=tbfilter,
             truncate_locals=truncate_locals,
         )
 

testing/code/test_excinfo.py

@@ -1603,3 +1603,48 @@ def test_all_entries_hidden(pytester: Pytester, tbstyle: str) -> None:
         result.stdout.fnmatch_lines(["*ZeroDivisionError: division by zero"])
     if tbstyle not in ("line", "native"):
         result.stdout.fnmatch_lines(["All traceback entries are hidden.*"])
+
+
+def test_hidden_entries_of_chained_exceptions_are_not_shown(pytester: Pytester) -> None:
+    """Hidden entries of chained exceptions are not shown (#1904)."""
+    p = pytester.makepyfile(
+        """
+        def g1():
+            __tracebackhide__ = True
+            str.does_not_exist
+
+        def f3():
+            __tracebackhide__ = True
+            1 / 0
+
+        def f2():
+            try:
+                f3()
+            except Exception:
+                g1()
+
+        def f1():
+            __tracebackhide__ = True
+            f2()
+
+        def test():
+            f1()
+        """
+    )
+    result = pytester.runpytest(str(p), "--tb=short")
+    assert result.ret == 1
+    result.stdout.fnmatch_lines(
+        [
+            "*.py:11: in f2",
+            "    f3()",
+            "E   ZeroDivisionError: division by zero",
+            "",
+            "During handling of the above exception, another exception occurred:",
+            "*.py:20: in test",
+            "    f1()",
+            "*.py:13: in f2",
+            "    g1()",
+            "E   AttributeError:*'does_not_exist'",
+        ],
+        consecutive=True,
+    )