fix(native): Possible segv in system data source creation

[czentgr]

If the handle is null it is accessed to provide data to print the error message. This results in invalid memory access and a possible segv.

Description

Motivation and Context

Impact

Test Plan

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Summary by Sourcery

Bug Fixes:

• Prevent possible segmentation fault by avoiding access to a potentially null column handle when formatting validation error messages in the system connector.

Summary by Sourcery

Bug Fixes:

• Avoid potential segmentation fault by using the validated column handle from the map instead of the possibly null handle when formatting error messages in system data source creation.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Fixes a potential segmentation fault in SystemDataSource construction by avoiding dereferencing a possibly null column handle when formatting a validation error message for system connector column handles.

File-Level Changes

Change	Details	Files
Guard error-message formatting against null column handle in system connector data source creation.	Change the formatted error message to use the validated map entry's column handle name instead of the possibly null handle pointer Preserve the existing validation logic while ensuring no dereference occurs on a null handle when constructing the error string Keep the lookup and subsequent column index resolution behavior unchanged aside from the safer name access	presto-native-execution/presto_cpp/main/connectors/SystemConnector.cpp

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[aditi-pandit]

Thanks @czentgr