Update never-type-fallback for never type stabilization - #384
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| > [!NOTE] | ||
| > The changes previously documented in this chapter are no longer edition-specific as of Rust CURRENT_RUSTC_VERSION. | ||
| > | ||
| > Never type (`!`) to any type ("never-to-any") coercions now fall back to never type (`!`) rather than to unit type (`()`) on all editions. | ||
| > | ||
| > The `dependency_on_unit_never_type_fallback` lint, which handled the migration, has also been removed. | ||
| > | ||
| > The description of "never-to-any" coercions below is kept for informational purposes. |
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Would it make sense to leave the rest of the document as-is, instead only mentioning here that it applies only to Rust < CURRENT_RUSTC_VERSION?
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Thanks @ehuss. Thanks @WaffleLapkin. |
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Rollup merge of #162439 - rustbot:docs-update, r=traviscross Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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Update books ## rust-lang/book 1 commits in 917544888a55e4da7109bdba8c88c893c0da70f4..1500248d8f230566e4ec9f27fcbb8fe9e2898ab1 2026-09-02 16:04:34 UTC to 2026-09-02 16:04:34 UTC - Update to Rust 1.98 (rust-lang/book#4823) ## rust-lang/edition-guide 1 commits in f5abcf137698e5ad6ebed359d69654ff705346af..ab8544aeed7b792984366aa122ac19bd47ad9a2f 2026-08-25 19:50:54 UTC to 2026-08-25 19:50:54 UTC - Update never-type-fallback for never type stabilization (rust-lang/edition-guide#384) ## rust-lang/reference 12 commits in 3b38834b39f732c64686f7c64aa29dcf3cd83ba5..e24eecf97b0c9a6dbac67191098204dc8a190aaa 2026-09-02 04:25:27 UTC to 2026-08-25 07:52:18 UTC - Fix nested block comment grammar (rust-lang/reference#2348) - dangling pointers: turn some consequences of the definition into notes (rust-lang/reference#2336) - Fix the nightly grammar validation job (rust-lang/reference#2347) - Order grammar summary deterministically (rust-lang/reference#2346) - Remove leftover `types/textual.md` file (rust-lang/reference#2345) - Fix non-leaf rules with bodies (rust-lang/reference#2344) - Fix rule IDs not following the header hierarchy (rust-lang/reference#2343) - Fix heading level of the `verbatim` modifier section (rust-lang/reference#2342) - Fix `...diagnostics.deprecated...` rule ID (rust-lang/reference#2341) - Update for stabilization of the never type (rust-lang/reference#2283) - Add missing punctuation (rust-lang/reference#2339) - Fix field-less `repr(C)` enum docs (rust-lang/reference#2018)
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This updates for the never type stabilization proposed in rust-lang/rust#155499.
cc @WaffleLapkin
This is a draft because the version number will need to be updated.