Fix ARM unittest (again) in std.math.

ibuclaw · wilzbach · commit 2523fa1c3daf · 2017-06-30T01:05:24.000+02:00
See #4132 and the revert of it in #4592. Added a comment so that the mistake is not done for the third time in a row.
diff --git a/std/math.d b/std/math.d
@@ -5878,7 +5878,7 @@ real NaN(ulong payload) @trusted pure nothrow @nogc
     }
 }
 
-@safe pure nothrow @nogc unittest
+@system pure nothrow @nogc unittest // not @safe because taking address of local.
 {
     static if (floatTraits!(real).realFormat == RealFormat.ieeeDouble)
     {

Original file line number	Diff line number	Diff line change
`@@ -5878,7 +5878,7 @@ real NaN(ulong payload) @trusted pure nothrow @nogc`
`5878`	`5878`	`}`
`5879`	`5879`	`}`
`5880`	`5880`
`5881`		`-@safe pure nothrow @nogc unittest`
	`5881`	`+@system pure nothrow @nogc unittest // not @safe because taking address of local.`
`5882`	`5882`	`{`
`5883`	`5883`	`static if (floatTraits!(real).realFormat == RealFormat.ieeeDouble)`
`5884`	`5884`	`{`