Harden TreeAccumulator for IDE

odersky · odersky · commit a3a91216b939 · 2017-06-20T16:23:35.000+02:00
diff --git a/compiler/src/dotty/tools/dotc/ast/Trees.scala b/compiler/src/dotty/tools/dotc/ast/Trees.scala
@@ -1305,8 +1305,10 @@ object Trees {
             this(this(x, arg), annot)
           case Thicket(ts) =>
             this(x, ts)
-          case _ if ctx.reporter.errorsReported =>
+          case _ if ctx.mode.is(Mode.Interactive) =>
             // in case of errors it may be that typed trees point to untyped ones.
+            // The can still traverse inside such trees, either in the run where errors
+            // are reported, or in subsequent ones.
             x
         }
       }

Original file line number	Diff line number	Diff line change
`@@ -1305,8 +1305,10 @@ object Trees {`
`1305`	`1305`	`this(this(x, arg), annot)`
`1306`	`1306`	`case Thicket(ts) =>`
`1307`	`1307`	`this(x, ts)`
`1308`		`- case _ if ctx.reporter.errorsReported =>`
	`1308`	`+ case _ if ctx.mode.is(Mode.Interactive) =>`
`1309`	`1309`	`// in case of errors it may be that typed trees point to untyped ones.`
	`1310`	`+ // The can still traverse inside such trees, either in the run where errors`
	`1311`	`+ // are reported, or in subsequent ones.`
`1310`	`1312`	`x`
`1311`	`1313`	`}`
`1312`	`1314`	`}`