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add note about no_std panics of libm to readme

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Julius Rakow 2018-08-26 15:06:09 +02:00
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@ -42,6 +42,9 @@ parity-wasm = {
The `core` feature requires the `core` and `alloc` libraries and a nightly compiler.
Also, code related to `std::error` is disabled.
Floating point operations in `no_std` use [`libm`](https://crates.io/crates/libm), which sometimes panics in debug mode (https://github.com/japaric/libm/issues/4).
So make sure to either use release builds or avoid WASM with floating point operations, for example by using [`deny_floating_point`](https://docs.rs/wasmi/0.4.0/wasmi/struct.Module.html#method.deny_floating_point).
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