Update Rust toolchain version to 1.98.1 - #5441
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mpapierski
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EdHastingsCasperAssociation,
darthsiroftardis and
zajko
September 4, 2026 14:33
zajko
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Sep 18, 2026
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Rust 1.98.1 fixes a miscompilation in vtable generation.
In Rust 1.98.0, in some circumstances, rustc would incorrectly generate a trait object vtable with a null pointer where a function pointer should be. This leads to undefined behavior in the emitted code. In some cases this may 'just' cause segfaults due to the null pointer being loaded, but it is possible for it to be justification for arbitrary effects (as is typical for UB).
Sounds reasonable to bump the patch release