Embedding document fails if tokens length > n_ctx

错误发生在 llama_cpp/llama.py 中，具体是在第 549 行的 eval 方法中。首先检查 create_embedding 方法（第 869 行）和 embed 方法（第 905 行），以了解 token 的处理方式。修复可能需要在调用 eval 之前添加对 token 长度是否超过 n_ctx 的检查，并引发清晰的错误或警告。在代码库中查找现有的验证模式，并使用长文档进行测试以重现该问题。

Prerequisites

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• [X ] I am running the latest code. Development is very rapid so there are no tagged versions as of now.
• [ X] I carefully followed the README.md.
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Expected Behavior

Embedding a document, if embedding document tokens are > to n_ctx , it should warn or exit()

Current Behavior

it fails with error
File "/home/mac/chatest/lib/python3.10/site-packages/langchain/embeddings/llamacpp.py", line 113, in embed_documents
embeddings = [self.client.embed(text) for text in texts]
File "/home/mac/chatest/lib/python3.10/site-packages/langchain/embeddings/llamacpp.py", line 113, in
embeddings = [self.client.embed(text) for text in texts]
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 905, in embed
return list(map(float, self.create_embedding(input)["data"][0]["embedding"]))
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 869, in create_embedding
self.eval(tokens)
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 549, in eval
self.input_ids[self.n_tokens : self.n_tokens + n_tokens] = batch
ValueError: could not broadcast input array from shape (8,) into shape (0,)

Environment and Context

Failure Information (for bugs)

Please help provide information about the failure if this is a bug. If it is not a bug, please remove the rest of this template.

Steps to Reproduce

document = open("DOC/mybigdocument.txt,"r")
text = document.read()
embeddings = LlamaCppEmbeddings(model_path=model_path,verbose=False)
embeddings.embed_documents([text])

Failure Logs

Pl File "/home/mac/chatest/lib/python3.10/site-packages/langchain/embeddings/llamacpp.py", line 113, in embed_documents
embeddings = [self.client.embed(text) for text in texts]
File "/home/mac/chatest/lib/python3.10/site-packages/langchain/embeddings/llamacpp.py", line 113, in
embeddings = [self.client.embed(text) for text in texts]
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 905, in embed
return list(map(float, self.create_embedding(input)["data"][0]["embedding"]))
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 869, in create_embedding
self.eval(tokens)
File "/home/mac/chatest/lib/python3.10/site-packages/llama_cpp/llama.py", line 549, in eval
self.input_ids[self.n_tokens : self.n_tokens + n_tokens] = batch
ValueError: could not broadcast input array from shape (8,) into shape (0,)