SI-8253 Fix incorrect parsing of <elem xmlns={f("a")}/>

The spliced application was placed in the `attrMap` in
`SymbolicXMLBuilder` and later incorrectly matched by a pattern
intended only to match:

    xml.Text(s)

That attribute value is generated by parsing:

   <elem xmlns='a'/>

So the net effect was that the two fragments of XML were identical!

This commit sharpens up the match to really look for a syntactic
`_root_.scala.xml.Text("...")`.

The test just prints the parse trees of a variety of cases, as we
we should not test the modularized XML library in scala/scala.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/ast/parser/SymbolicXMLBuilder.scala b/src/compiler/scala/tools/nsc/ast/parser/SymbolicXMLBuilder.scala
index 1abc0c860c..8cd915bf22 100755
--- a/src/compiler/scala/tools/nsc/ast/parser/SymbolicXMLBuilder.scala
+++ b/src/compiler/scala/tools/nsc/ast/parser/SymbolicXMLBuilder.scala
@@ -184,7 +184,8 @@ abstract class SymbolicXMLBuilder(p: Parsers#Parser, preserveWS: Boolean) {
       )
 
       val uri1 = attrMap(z) match {
-        case Apply(_, List(uri @ Literal(Constant(_)))) => mkAssign(uri)
+        case Apply(Select(New(Select(Select(Select(Ident(nme.ROOTPKG), nme.scala_), nme.xml), tpnme.Text)), nme.CONSTRUCTOR), List(uri @ Literal(Constant(_)))) =>
+          mkAssign(uri)
         case Select(_, nme.Nil)                         => mkAssign(const(null))  // allow for xmlns="" -- bug #1626
         case x                                          => mkAssign(x)
       }