From e05b33ed162fd9da8f9c44c9de035a0fa14631ec Mon Sep 17 00:00:00 2001
From: Yoav Caspi <yoavcaspi@gmail.com>
Date: Sat, 19 Oct 2019 22:28:06 +0300
Subject: [PATCH] setuponly: remove printing out/err from capman

---
 AUTHORS                      |  1 +
 changelog/5906.bugfix.rst    |  1 +
 src/_pytest/setuponly.py     |  5 -----
 testing/python/setup_only.py | 36 ++++++++++++++++++++++++++++++++++++
 4 files changed, 38 insertions(+), 5 deletions(-)
 create mode 100644 changelog/5906.bugfix.rst

diff --git a/AUTHORS b/AUTHORS
index 9f6ee048d..e11400c1f 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -267,5 +267,6 @@ Wouter van Ackooy
 Xixi Zhao
 Xuan Luong
 Xuecong Liao
+Yoav Caspi
 Zac Hatfield-Dodds
 Zoltán Máté
diff --git a/changelog/5906.bugfix.rst b/changelog/5906.bugfix.rst
new file mode 100644
index 000000000..f5ded6cd2
--- /dev/null
+++ b/changelog/5906.bugfix.rst
@@ -0,0 +1 @@
+Fix crash with ``KeyboardInterrupt`` during ``--setup-show``.
diff --git a/src/_pytest/setuponly.py b/src/_pytest/setuponly.py
index 70d6ed12f..639349748 100644
--- a/src/_pytest/setuponly.py
+++ b/src/_pytest/setuponly.py
@@ -1,5 +1,3 @@
-import sys
-
 import pytest
 
 
@@ -51,7 +49,6 @@ def _show_fixture_action(fixturedef, msg):
     capman = config.pluginmanager.getplugin("capturemanager")
     if capman:
         capman.suspend_global_capture()
-        out, err = capman.read_global_capture()
 
     tw = config.get_terminal_writer()
     tw.line()
@@ -74,8 +71,6 @@ def _show_fixture_action(fixturedef, msg):
 
     if capman:
         capman.resume_global_capture()
-        sys.stdout.write(out)
-        sys.stderr.write(err)
 
 
 @pytest.hookimpl(tryfirst=True)
diff --git a/testing/python/setup_only.py b/testing/python/setup_only.py
index 7c871a9ee..1c3a1d368 100644
--- a/testing/python/setup_only.py
+++ b/testing/python/setup_only.py
@@ -267,3 +267,39 @@ def test_show_fixtures_and_execute_test(testdir):
     result.stdout.fnmatch_lines(
         ["*SETUP    F arg*", "*test_arg (fixtures used: arg)F*", "*TEARDOWN F arg*"]
     )
+
+
+def test_setup_show_with_KeyboardInterrupt_in_test(testdir):
+    """ Verifies that setups are shown and tests are executed even if there was a KeyboardInterrupt in a test. """
+    p = testdir.makepyfile(
+        """
+        import pytest
+        @pytest.fixture
+        def arg():
+            assert True
+        def test_arg(arg):
+            raise KeyboardInterrupt()
+    """
+    )
+    result = testdir.runpytest("--setup-show", p, no_reraise_ctrlc=True)
+    assert result.ret == 2
+    result.stdout.fnmatch_lines(
+        ["*SETUP    F arg*", "*test_arg (fixtures used: arg)*", "*TEARDOWN F arg*"]
+    )
+
+
+def test_setup_show_with_KeyboardInterrupt_in_fixture(testdir):
+    """ Verifies that setups are shown and tests are executed even if there was a KeyboardInterrupt in a fixture. """
+    p = testdir.makepyfile(
+        """
+        import pytest
+        @pytest.fixture
+        def arg():
+            raise KeyboardInterrupt()
+        def test_arg(arg):
+            assert True
+    """
+    )
+    result = testdir.runpytest("--setup-show", p, no_reraise_ctrlc=True)
+    assert result.ret == 2
+    result.stdout.fnmatch_lines(["*SETUP    F arg*", "*KeyboardInterrupt*"])