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cosmwasm-std: avoid dependency on std::error::Error #1785

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@mina86 mina86 commented Jul 20, 2023

std::error::Error doesn’t currently have a stable no_std
equivalence. core::error::Error is a thing but it’s unstable and
thus requires nightly compiler.

There’s one hack we can use. serde has no_std support and exports
Error as serde::de::StdError. This way we hide the need for
nightly compiler to serde.

The two alternatives are:

  • require nightly compiler or
  • don’t implement std::error::Error in no_std builds.

Issue: #1484

std::error::Error doesn’t currently have a stable no_std equivalence.
core::error::Error is a thing but it’s unstable and thus requires
nightly compiler.

There’s one hack we can use.  serde has no_std support and exports
std::error::Error as serde::de::StdErr.  This way we hide the need
for nightly compiler to serde.

The two alternatives are:
- require nightly compiler or
- don’t implement std::error::Error in no_std builds.

Issue: CosmWasm#1484
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