diff options
| -rw-r--r-- | src/compiler/scala/tools/nsc/typechecker/Namers.scala | 3 | ||||
| -rw-r--r-- | test/files/pos/t7668.scala | 12 |
2 files changed, 15 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Namers.scala b/src/compiler/scala/tools/nsc/typechecker/Namers.scala index 1282cfb416..08837d9a54 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Namers.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Namers.scala @@ -1084,6 +1084,9 @@ trait Namers extends MethodSynthesis { overriddenTp = overriddenTp.resultType } + // SI-7668 Substitute parameters from the parent method with those of the overriding method. + overriddenTp = overriddenTp.substSym(overridden.paramss.flatten, vparamss.flatten.map(_.symbol)) + overriddenTp match { case NullaryMethodType(rtpe) => overriddenTp = rtpe case MethodType(List(), rtpe) => overriddenTp = rtpe diff --git a/test/files/pos/t7668.scala b/test/files/pos/t7668.scala new file mode 100644 index 0000000000..222a13d039 --- /dev/null +++ b/test/files/pos/t7668.scala @@ -0,0 +1,12 @@ +trait Space { + type T + val x: T +} + +trait Extractor { + def extract(s: Space): s.T +} + +class Sub extends Extractor { + def extract(s: Space) = s.x +} |