Fix isGlobal and move tests

Move pos tests to pos-custom-args, for symmetry with neg tests.

Author: odersky

compiler/src/dotty/tools/dotc/typer/CheckCaptures.scala

@@ -124,6 +124,7 @@ class CheckCaptures extends RefineTypes:
               val isGlobal = ref match
                 case ref: TypeRef => ref.isRootCapability
                 case ref: TermRef => ref.prefix != NoPrefix && ref.symbol.hasAnnotation(defn.AbilityAnnot)
+                case _ => false
               val what = if ref.isRootCapability then "universal" else "global"
               if isGlobal then
                 val notAllowed = i" is not allowed to capture the $what capability $ref"

compiler/test/dotty/tools/dotc/CompilationTests.scala

@@ -33,13 +33,13 @@ class CompilationTests {
       compileFilesInDir("tests/pos-special/sourcepath/outer", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
       compileFile("tests/pos-special/sourcepath/outer/nested/Test4.scala", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
       compileFilesInDir("tests/pos-special/fatal-warnings", defaultOptions.and("-Xfatal-warnings", "-deprecation", "-feature")),
-      compileFilesInDir("tests/pos-special/captures", defaultOptions.and("-Ycc")),
       compileFile("tests/pos-special/avoid-warn-deprecation.scala", defaultOptions.and("-Xfatal-warnings", "-feature")),
       compileFilesInDir("tests/pos-special/spec-t5545", defaultOptions),
       compileFilesInDir("tests/pos-special/strawman-collections", allowDeepSubtypes),
       compileFilesInDir("tests/pos-special/isInstanceOf", allowDeepSubtypes.and("-Xfatal-warnings")),
       compileFilesInDir("tests/new", defaultOptions),
       compileFilesInDir("tests/pos-scala2", scala2CompatMode),
+      compileFilesInDir("tests/pos-custome-args/captures", defaultOptions.and("-Ycc")),
       compileFilesInDir("tests/pos-custom-args/erased", defaultOptions.and("-language:experimental.erasedDefinitions")),
       compileFilesInDir("tests/pos", defaultOptions.and("-Ysafe-init")),
       compileFilesInDir("tests/pos-deep-subtype", allowDeepSubtypes),