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[0.3.4] - 2025-10-14

Major change to wasm_js backend

Now, when the wasm_js feature is enabled, the wasm_js backend will be used
by default. Users of wasm32-unknown-unknown targeting JavaScript environments
like the Web and Node.js will no longer need to specify:

--cfg getrandom_backend="wasm_js"

in RUSTFLAGS for the crate to compile. They can now simple enable a feature.

Note: this should not affect non-JS users of the wasm32-unknown-unknown
target. Using --cfg getrandom_backend will still override the source of
randomness even if the wasm_js feature is enabled. This includes
--cfg getrandom_backend=custom and --cfg getrandom_backend=unsupported.

For more information, see the discussions in #671, #675, and #730.

Added

  • unsupported opt-in backend #667
  • windows_legacy opt-in backend #724

Changed

  • Implement Memory Sanitizer unpoisoning more precisely #678
  • Relax MSRV for the linux_raw opt-in backend on ARM targets #688
  • Use getrandom syscall on all RISC-V Linux targets #699
  • Replaced wasi dependency with wasip2 #721
  • Enable wasm_js backend by default if the wasm_js feature is enabled #730

Removed

  • Unstable rustc-dep-of-std crate feature #694

Signed-off-by: Joe Richey <[email protected]>
Signed-off-by: Joe Richey <[email protected]>
@josephlr josephlr requested review from dhardy and newpavlov October 14, 2025 08:11
@josephlr josephlr merged commit 2d033b7 into rust-random:master Oct 14, 2025
75 checks passed
@josephlr josephlr deleted the release branch October 14, 2025 17:31
@josephlr
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Whoops, forgot to change the version number, this is done in #736

Crate released: https://crates.io/crates/getrandom/0.3.4

@janhohenheim
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janhohenheim commented Oct 14, 2025

Thank you so much ❤️

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4 participants