From cf8e32dc53dd318b210f46c954d50e08b1d52030 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Thu, 3 Sep 2020 20:57:24 +0000
Subject: [PATCH] add a test case for an invalid optimizatio

A recent optimization was overly aggressive and resulted in a miscompile
in FoundationNetworking. Add a test case.
---
 .../test-foundation-networking-fetch.swift                | 6 ++++++
 .../test-foundation-networking-fetch.txt                  | 8 ++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 test-foundation-package/test-foundation-networking-fetch.swift
 create mode 100644 test-foundation-package/test-foundation-networking-fetch.txt

diff --git a/test-foundation-package/test-foundation-networking-fetch.swift b/test-foundation-package/test-foundation-networking-fetch.swift
new file mode 100644
index 0000000..741320a
--- /dev/null
+++ b/test-foundation-package/test-foundation-networking-fetch.swift
@@ -0,0 +1,6 @@
+import Foundation
+import FoundationNetworking
+
+let url = URL(string: "http://swift.org")!
+let data = try! Data(contentsOf: url)
+print(data.underestimatedCount)
diff --git a/test-foundation-package/test-foundation-networking-fetch.txt b/test-foundation-package/test-foundation-networking-fetch.txt
new file mode 100644
index 0000000..4425c5f
--- /dev/null
+++ b/test-foundation-package/test-foundation-networking-fetch.txt
@@ -0,0 +1,8 @@
+REQUIRES: platform=Linux
+
+RUN: rm -rf %t
+RUN: mkdir -p %t
+RUN: %{swiftc}  -o %t/test-foundation-networking-fetch %S/test-foundation-networking-fetch.swift
+RUN: %t/test-foundation-networking-fetch | %{FileCheck} %s
+
+CHECK: {{[0-9]+}}