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Friendlier error message with solution (#19880)

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* Add helpful suggestion, should always apply

* mention var param limitation in async docs

* Update compiler/lambdalifting.nim

whoops thanks

Co-authored-by: flywind <43030857+xflywind@users.noreply.github.com>

Co-authored-by: flywind <43030857+xflywind@users.noreply.github.com>
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Carlo Capocasa 2022-06-11 18:23:31 +02:00 • committed by GitHub
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5
lib/pure/asyncdispatch.nim
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@ -98,6 +98,10 @@
## `await`. The following section shows different ways that you can handle
## exceptions in async procs.
##
## .. caution::
## Procedures marked {.async.} do not support mutable parameters such
## as `var int`. References such as `ref int` should be used instead.
##
## Handling Exceptions
## -------------------
##
@ -192,6 +196,7 @@
## ================
##
## * The effect system (`raises: []`) does not work with async procedures.
## * Mutable parameters are not supported by async procedures.
##
##
## Multiple async backend support