Protect use cases where systemMessage is missing #4724
Merged
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Description
Fixes issue #4723
messageContent.ts#renderChatMessages
is protected from use cases where there is no systemMessage.VertexAI.ts
was updated to tolerate when none of the messages have a 'system' role.Checklist
Screenshots
[ For visual changes, include screenshots. ]
Testing instructions
See the reproduction instructions on #4723.