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Defensive coding for negative indices in tool calls #469

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Defensive coding for negative indices in tool calls #469

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Defensive coding for negative indices in tool calls
coolbaluk Aug 7, 2025
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coolbaluk Aug 8, 2025
eb116b0
Merge branch 'openai:main' into main
coolbaluk Aug 17, 2025
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10 changes: 8 additions & 2 deletions streamaccumulator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -125,8 +125,14 @@ func (cc *ChatCompletion) accumulateDelta(chunk ChatCompletionChunk) bool {
for j := range delta.Delta.ToolCalls {
deltaTool := &delta.Delta.ToolCalls[j]

choice.Message.ToolCalls = expandToFit(choice.Message.ToolCalls, int(deltaTool.Index))
tool := &choice.Message.ToolCalls[deltaTool.Index]
// Handle negative tool call indices (sometimes -1 from Bedrock)
toolIndex := int(deltaTool.Index)
if toolIndex < 0 {
toolIndex = 0 // Default to 0 for negative indices
}

choice.Message.ToolCalls = expandToFit(choice.Message.ToolCalls, toolIndex)
tool := &choice.Message.ToolCalls[toolIndex]

if deltaTool.ID != "" {
tool.ID = deltaTool.ID
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