fix(protocols): handle missing error.Error in queryCompat mode #7758
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fix(protocols): handle missing error.Error in queryCompat mode #7758
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When an awsQueryCompatible client (e.g. CloudWatchClient) receives an error
response without the x-amzn-query-error header, the decorateServiceException
method would throw:
TypeError: Cannot read properties of undefined (reading 'Type')
This happens because error.Error is only set by setQueryCompatError() when the
x-amzn-query-error header is present. If the header is absent (e.g., due to a
proxy not forwarding the x-amzn-query-mode request header), error.Error is
undefined.
This fix adds optional chaining to gracefully handle the case where error.Error
is undefined, allowing the error to degrade gracefully instead of crashing.
Fixes #7756
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
3 tasks
trivikr
approved these changes
Feb 20, 2026
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see original description in #7757