Fix crash when discovery fails while using `-p no:terminal`

changelog/5505.bugfix.rst

@@ -0,0 +1 @@
+Fix crash when discovery fails while using ``-p no:terminal``.

src/_pytest/nodes.py

@@ -323,7 +323,7 @@ class Collector(Node):
 
         # Respect explicit tbstyle option, but default to "short"
         # (None._repr_failure_py defaults to "long" without "fulltrace" option).
-        tbstyle = self.config.getoption("tbstyle")
+        tbstyle = self.config.getoption("tbstyle", "auto")
         if tbstyle == "auto":
             tbstyle = "short"
 

testing/test_config.py

@@ -741,7 +741,7 @@ def test_config_in_subdirectory_colon_command_line_issue2148(testdir):
         **{
             "conftest": conftest_source,
             "subdir/conftest": conftest_source,
-            "subdir/test_foo": """
+            "subdir/test_foo": """\
             def test_foo(pytestconfig):
                 assert pytestconfig.getini('foo') == 'subdir'
             """,
@@ -777,6 +777,12 @@ def test_notify_exception(testdir, capfd):
     assert "ValueError" in err
 
 
+def test_no_terminal_discovery_error(testdir):
+    testdir.makepyfile("raise TypeError('oops!')")
+    result = testdir.runpytest("-p", "no:terminal", "--collect-only")
+    assert result.ret == ExitCode.INTERRUPTED
+
+
 def test_load_initial_conftest_last_ordering(testdir, _config_for_test):
     pm = _config_for_test.pluginmanager