Update nightly to fix multilimb subtraction bug#313
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ashpect
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Mar 5, 2026
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On the old toolchain the carry logic in arkwork's ff (
ff/src/biginteger/arithmetic.rs) gets incorrectly compiled under some circumstances.The error was in one of the later IR stages (after emit llvm from Rust). A borrow (-1) was turned into 2^64-1 in a i128 register and this interfered with the carry logic used by ark ff. On the latest stable this is -1. Given that the IR didn’t change any other way I’m fairly confident this issue has been resolved.