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https://issues.apache.org/jira/browse/FLINK-6943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16055796#comment-16055796
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ASF GitHub Bot commented on FLINK-6943:
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Github user zentol commented on the issue:
https://github.com/apache/flink/pull/4140
merging.
> Improve exceptions within TypeExtractionUtils#getSingleAbstractMethod
> ---------------------------------------------------------------------
>
> Key: FLINK-6943
> URL: https://issues.apache.org/jira/browse/FLINK-6943
> Project: Flink
> Issue Type: Bug
> Components: Core
> Reporter: Dawid Wysakowicz
> Assignee: Dawid Wysakowicz
>
> Exception message seems to be inexact.
> Also if there is no SAM, sam would be null upon returning from the method.
> The suggestion from a review was to change the message and add a check (for
> null sam) prior to returning.
> Another suggestion is to check if the given method is an interface, as only
> for interface it is possible to pass lambda.
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