fixes #21027; cast expressions need a type

nim-lang · Dec 6, 2022 · afadac3 · afadac3
1 parent 794bcc8
commit afadac3
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Showing 2 changed files with 8 additions and 0 deletions.
diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
@@ -394,6 +394,9 @@ proc semCast(c: PContext, n: PNode): PNode =
   let castedExpr = semExprWithType(c, n[1])
   if castedExpr.kind == nkClosedSymChoice:
     errorUseQualifier(c, n[1].info, castedExpr)
+  if targetType == nil:
+    localError(c.config, n.info, errExprXHasNoType %
+                renderTree(n, {renderNoComments}))
   if tfHasMeta in targetType.flags:
     localError(c.config, n[0].info, "cannot cast to a non concrete type: '$1'" % $targetType)
   if not isCastable(c, targetType, castedExpr.typ, n.info):

diff --git a/tests/types/t21027.nim b/tests/types/t21027.nim
@@ -0,0 +1,5 @@
+discard """
+  errormsg: "expression 'cast(5)' has no type (or is ambiguous)"
+"""
+# bug #21027
+let x: uint64 = cast(5)