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| author | Adriaan Moors <adriaan.moors@epfl.ch> | 2007-05-02 21:25:49 +0000 |
|---|---|---|
| committer | Adriaan Moors <adriaan.moors@epfl.ch> | 2007-05-02 21:25:49 +0000 |
| commit | d1c4f9e32b3f12f6f03b58be671f24b775c4ae9f (patch) | |
| tree | 273aecb50e1a17c8aaa22aad4be4a67b044610e4 | |
| parent | 41b90d5719f1cf19108b0107965493ca53b56ce8 (diff) | |
| download | scala-d1c4f9e32b3f12f6f03b58be671f24b775c4ae9f.tar.gz scala-d1c4f9e32b3f12f6f03b58be671f24b775c4ae9f.tar.bz2 scala-d1c4f9e32b3f12f6f03b58be671f24b775c4ae9f.zip | |
fixed bug with type alias expansion that turned...
fixed bug with type alias expansion that turned up when an old-style type constructor alias (e.g. type Class = java.lang.Class in Predef) was compiled without the new checks (in the example, without -Xgenerics), and now it's used with the checks (with -Xgenerics). Then, normalize didn't do anything (as the number of type params didn't coincide with the number of type arguments). I.e., it returned `this', which resulted in an infinite recursion.
| -rw-r--r-- | src/compiler/scala/tools/nsc/symtab/Types.scala | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/compiler/scala/tools/nsc/symtab/Types.scala b/src/compiler/scala/tools/nsc/symtab/Types.scala index bfd83eaff6..1c31a09bb9 100644 --- a/src/compiler/scala/tools/nsc/symtab/Types.scala +++ b/src/compiler/scala/tools/nsc/symtab/Types.scala @@ -1206,8 +1206,11 @@ A type's symbol should never be inspected directly. else if (isHigherKinded) PolyType(typeParams, transform(sym.info.resultType).normalize) else { - log("normalizing "+this+" with mismatch between type params "+sym.info.typeParams+" and args "+args) - this + log("Error: normalizing "+this+" with mismatch between type params "+sym.info.typeParams+" and args "+args) + //this + transform(sym.info.resultType).normalize // technically wrong, but returning `this' is even worse (cycle!) + // only happens when compiling `val x: Class' with -Xgenerics, + // when `type Class = java.lang.Class' has already been compiled (without -Xgenerics) } } else if (isHigherKinded) { PolyType(typeParams, typeRef(pre, sym, higherKindedArgs)) // @M TODO: transform? |