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report expression has no type other than has to be used (or discarded… #20392

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merged 1 commit into from
Sep 20, 2022
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report expression has no type other than has to be used (or discarded… #20392

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3 changes: 3 additions & 0 deletions compiler/semstmts.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,9 @@ proc discardCheck(c: PContext, result: PNode, flags: TExprFlags) =
var n = newNodeI(nkDiscardStmt, result.info, 1)
n[0] = result
elif result.typ.kind != tyError and c.config.cmd != cmdInteractive:
if result.typ.kind == tyNone:
localError(c.config, result.info, "expression has no type: " &
renderTree(result, {renderNoComments}))
var n = result
while n.kind in skipForDiscardable:
if n.kind == nkTryStmt: n = n[0]
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6 changes: 6 additions & 0 deletions tests/errmsgs/t8064.nim
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@@ -0,0 +1,6 @@
discard """
errormsg: "expression has no type: values"
"""
import tables

values