Fix printing of errors

liufengyun · liufengyun · commit 00fbf27972db · 2019-02-01T13:38:06.000+01:00
diff --git a/compiler/src/dotty/tools/dotc/printing/Formatting.scala b/compiler/src/dotty/tools/dotc/printing/Formatting.scala
@@ -31,7 +31,8 @@ object Formatting {
           case NonFatal(ex)
           if !ctx.mode.is(Mode.PrintShowExceptions) &&
              !ctx.settings.YshowPrintErrors.value =>
-            s"[cannot display due to $ex, raw string = ${arg.toString}]"
+            val msg = ex match { case te: TypeError => te.toMessage case _ => ex.getMessage }
+            s"[cannot display due to $msg, raw string = ${arg.toString}]"
         }
       case _ => arg.toString
     }

Original file line number	Diff line number	Diff line change
`@@ -31,7 +31,8 @@ object Formatting {`
`31`	`31`	`case NonFatal(ex)`
`32`	`32`	`if !ctx.mode.is(Mode.PrintShowExceptions) &&`
`33`	`33`	`!ctx.settings.YshowPrintErrors.value =>`
`34`		`- s"[cannot display due to $ex, raw string = ${arg.toString}]"`
	`34`	`+ val msg = ex match { case te: TypeError => te.toMessage case _ => ex.getMessage }`
	`35`	`+ s"[cannot display due to $msg, raw string = ${arg.toString}]"`
`35`	`36`	`}`
`36`	`37`	`case _ => arg.toString`
`37`	`38`	`}`