fix #20588 (#21104)

nim-lang · Dec 15, 2022 · 8054be6 · 8054be6
1 parent d88f46d
commit 8054be6
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diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
@@ -319,6 +319,8 @@ proc semConv(c: PContext, n: PNode; expectedType: PType = nil): PNode =
       return evaluated
     else:
       targetType = targetType.base
+  of tyAnything, tyUntyped, tyTyped:
+    localError(c.config, n.info, "illegal type conversion to '$1'" % typeToString(targetType))
   else: discard
 
   maybeLiftType(targetType, c, n[0].info)

diff --git a/tests/arc/t20588.nim b/tests/arc/t20588.nim
@@ -0,0 +1,22 @@
+discard """
+  cmd: "nim check --warnings:off --hints:off $file"
+  errormsg: ""
+  nimout: '''
+t20588.nim(20, 12) Error: illegal type conversion to 'auto'
+t20588.nim(21, 14) Error: illegal type conversion to 'typed'
+t20588.nim(22, 16) Error: illegal type conversion to 'untyped'
+'''
+"""
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+discard 0.0.auto
+discard typed("abc")
+discard untyped(4)