From da127b18b8345e53a7deae7a690fe94feefbbf91 Mon Sep 17 00:00:00 2001
From: Inkrementator <70717315+Inkrementator@users.noreply.github.com>
Date: Mon, 17 Mar 2025 21:50:30 +0100
Subject: [PATCH] Add regression test for #10491

---
 std/math/algebraic.d | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/std/math/algebraic.d b/std/math/algebraic.d
index a331668a9..1b9e15b1f 100644
--- a/std/math/algebraic.d
+++ b/std/math/algebraic.d
@@ -420,6 +420,15 @@ if (isFloatingPoint!T)
     assert(hypot(double.infinity, double.nan) == double.infinity);
 }
 
+// https://github.com/dlang/phobos/issues/10491
+@safe pure nothrow unittest
+{
+    import std.math : isClose;
+
+    enum small = 5.016556e-20f;
+    assert(hypot(small, 0).isClose(small));
+}
+
 @safe unittest
 {
     import std.math.operations : feqrel;