==== Ether send ====
Type: Warning
Contract: Unknown
Function name: withdrawfunds()
PC address: 816
In the function `withdrawfunds()` a non-zero amount of Ether is sent to msg.sender.

There is a check on storage index 1. This storage slot can be written to by calling the function `crowdfunding()`.
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==== Integer Overflow  ====
Type: Warning
Contract: Unknown
Function name: invest()
PC address: 483
A possible integer overflow exists in the function `invest()`.
The addition or multiplication may result in a value higher than the maximum representable integer.
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