Broken on Mipsel #13091

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1. krobelus commented on Nov 11, 2026

   

   krobelus

   on Nov 11, 2026 via email

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   Sounds like $ cargo init repro $ cd repro $ cargo add getrandom $ echo >src/main.rs ' fn main() { getrandom::fill(&mut [0_u8]).unwrap(); } ' $ cargo run should reproduce the error The getrandom README provides a lead:

   ### `/dev/urandom` fallback on Linux and Android On Linux targets, the `/dev/urandom` fallback is present only if either `target_env` is `musl`, or `target_arch` is one of the following: `aarch64`, `arm`, `powerpc`, `powerpc64`, `s390x`, `x86`, `x86_64`. Other supported targets [require][platform-support] kernel versions that support the `getrandom` system call, so the fallback is not needed.

   so the /dev/urandom fallback is not present for MIPS, seemingly because according to [Rust's platform-support](https://doc.rust-lang.org/stable/rustc/platform-support.html), MIPS platform supported by Rust has Linux >4.4 and is guaranteed to have the syscall for `getrandom()` (I didn't check that). what's your Linux version?
2. constgen commented on Nov 11, 2026

   

   constgen

   on Nov 11, 2026

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   / # uname -a
   Linux Keenetic-Hero 4.9-ndm-5 #0 SMP Fri Oct 9 18:13:59 2026 mips GNU/Linux
   / # uname -r
   4.9-ndm-5
   / # cat /proc/version
   Linux version 4.9-ndm-5 (developers@keenetic.com) (gcc version 14.3.0 (crosstool-NG 1.27.0_ndm_5.1_05356ea) ) #0 SMP Fri Oct 9 18:13:59 2026