diff options
| -rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Typers.scala | 2 | ||||
| -rw-r--r-- | test/files/neg/t7636-neg.check | 10 | ||||
| -rw-r--r-- | test/files/neg/t7636.scala | 7 |
3 files changed, 19 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Typers.scala b/src/compiler/scala/tools/nsc/typechecker/Typers.scala index 1a2e498bca..bf2170310f 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Typers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Typers.scala @@ -2010,6 +2010,8 @@ trait Typers extends Modes with Adaptations with Tags { // !!! This method is redundant with other, less buggy ones. def decompose(call: Tree): (Tree, List[Tree]) = call match { + case _ if call.isErrorTyped => // e.g. SI-7636 + (call, Nil) case Apply(fn, args) => // an object cannot be allowed to pass a reference to itself to a superconstructor // because of initialization issues; SI-473, SI-3913, SI-6928. diff --git a/test/files/neg/t7636-neg.check b/test/files/neg/t7636-neg.check new file mode 100644 index 0000000000..f70d50bee3 --- /dev/null +++ b/test/files/neg/t7636-neg.check @@ -0,0 +1,10 @@ +t7636.scala:3: error: illegal inheritance; + self-type Main.C does not conform to Main.ResultTable[_$3]'s selftype Main.ResultTable[_$3] + class C extends ResultTable(Left(5):Either[_,_])(5) + ^ +t7636.scala:3: error: type mismatch; + found : Either[_$2,_$3(in constructor C)] where type _$3(in constructor C), type _$2 + required: Either[_, _$3(in object Main)] where type _$3(in object Main) + class C extends ResultTable(Left(5):Either[_,_])(5) + ^ +two errors found diff --git a/test/files/neg/t7636.scala b/test/files/neg/t7636.scala new file mode 100644 index 0000000000..a7b1b90151 --- /dev/null +++ b/test/files/neg/t7636.scala @@ -0,0 +1,7 @@ +object Main extends App{ + class ResultTable[E]( query : Either[_,E] )( columns : Int ) + class C extends ResultTable(Left(5):Either[_,_])(5) +} +// Inference of the existential type for the parent type argument +// E still fails. That looks tricky to fix, see the comments in SI-7636. +// But we at least prevent a cascading NPE.
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