Don't leave is_block in bad state after bad redirection

Fixes #1728.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/status.in b/tests/status.in
new file mode 100644
index 00000000..14dff232
--- /dev/null
+++ b/tests/status.in
@@ -0,0 +1,9 @@
+# vim: set filetype=fish:
+
+# Issue #1728
+# Bad file redirection on a block causes `status --is-block` to return 0 forever.
+begin; end >/ # / is a directory, it can't be opened for writing
+status -b
+and echo 'block'
+
+true