chore: Set MSRV to 1.68 and pin indexmap to fix CI faliure#310
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boquan-fang merged 4 commits intocamshaft:masterfrom Feb 19, 2026
Merged
chore: Set MSRV to 1.68 and pin indexmap to fix CI faliure#310boquan-fang merged 4 commits intocamshaft:masterfrom
boquan-fang merged 4 commits intocamshaft:masterfrom
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boquan-fang
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Feb 19, 2026
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This change sets bolero’s MSRV to Rust 1.68 (partially reverting #309) to keep the MSRV conservative while allowing dependencies to resolve cleanly.
One important callout is that bolero-generator-derive depends on proc-macro-crate, which depends on toml_edit, which in turn depends on indexmap = "^2". Because this requirement allows any 2.x release, Cargo may resolve to newer versions (e.g. indexmap 2.12+) that require rustc 1.82 or newer, breaking the intended MSRV.
To address this, this change pins indexmap to the newest release compatible with our MSRV. The most recent indexmap version that builds on Rust 1.63+ is 2.11.2, which avoids the MSRV regression while remaining semver-compatible.
The increase from the previous MSRV of 1.66 (prior to #309) to 1.68 is intentional. Other transitive dependencies, notably syn and quote - were failing CI because they now require Rust 1.68 or newer.
This should keep bolero’s MSRV conservative, aligned with its dependencies, and restores CI stability.