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File _service:tar_scm_kernel_repo:backport-tests-sort-NaN-infloop-augment-testing-for-recent-fi.patch of Package coreutils (Revision 92ef14e1bb6e970050f1625ac5533ab7)

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From ddafdae21c574b1dcd5c56e403c82010e7ed3565 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
Date: Mon, 2 May 2022 14:27:34 +0100
Subject: [PATCH] tests: sort-NaN-infloop: augment testing for recent fix

* tests/misc/sort-NaN-infloop.sh: Add test case from
https://unix.stackexchange.com/a/700967/37127
* src/sort.c: Avoid syntax-check failure.
---
 src/sort.c                     | 2 +-
 tests/misc/sort-NaN-infloop.sh | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/sort.c b/src/sort.c
index b2a465cf5..8af356c66 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -2006,7 +2006,7 @@ numcompare (char const *a, char const *b)
 static int
 nan_compare (long double a, long double b)
 {
-  char buf[2][sizeof "-nan()" + CHAR_BIT * sizeof a];
+  char buf[2][sizeof "-nan""()" + CHAR_BIT * sizeof a];
   snprintf (buf[0], sizeof buf[0], "%Lf", a);
   snprintf (buf[1], sizeof buf[1], "%Lf", b);
   return strcmp (buf[0], buf[1]);
diff --git a/tests/misc/sort-NaN-infloop.sh b/tests/misc/sort-NaN-infloop.sh
index 93cf9bd77..cc1c583cd 100755
--- a/tests/misc/sort-NaN-infloop.sh
+++ b/tests/misc/sort-NaN-infloop.sh
@@ -23,6 +23,9 @@ echo nan > F || framework_failure_
 printf 'nan\nnan\n' > exp || framework_failure_
 timeout 10 sort -g -m F F > out || fail=1
 
+# This was seen to infloop on some systems until coreutils v9.2 (bug 55212)
+yes nan | head -n128095 | timeout 60 sort -g > /dev/null || fail=1
+
 compare exp out || fail=1
 
 Exit $fail
-- 
2.27.0