[Diff since v6.35.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.35.0...v6.35.1)

**Closed issues:**
- Cannot resize integrator when using reshape inside SavingCallback (#1809)

**Merged pull requests:**
- Use `promote_type`/ `eltype` instead of indexing (#1810) (@oscardssmith)
- revert changes in #1810 (initdt) (#1813) (@oscardssmith)

[Diff since v6.34.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.34.1...v6.35.0)

**Merged pull requests:**
- Bump lower bound for nlsolver cleanup (#1807) (@ChrisRackauckas)

[Diff since v6.34.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.34.0...v6.34.1)

[Diff since v6.33.3](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.33.3...v6.34.0)

**Merged pull requests:**
- Remove any dependence of the nlsolve pieces from DiffEqBase (#1806) (@ChrisRackauckas)

[Diff since v6.33.2](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.33.2...v6.33.3)

**Merged pull requests:**
- Update ambiguity tests (#1805) (@ChrisRackauckas)

[Diff since v6.33.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.33.1...v6.33.2)

**Merged pull requests:**
- Fix ArrayFuse broadcast overload (#1771) (@ChrisRackauckas)

[Diff since v6.33.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.33.0...v6.33.1)

[Diff since v6.32.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.32.0...v6.33.0)

**Merged pull requests:**
- Remove CompositeSolution (#1804) (@ChrisRackauckas)

[Diff since v6.31.2](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.31.2...v6.32.0)

**Closed issues:**
- In-place error estimate fails with arrays of `FieldVector`s (from StaticArrays.jl) (#1799)

**Merged pull requests:**
- Bump exponentialutilities (#1785) (@ChrisRackauckas)
- reproducible docs (#1796) (@ArnoStrouwen)
- Optimize QNDF's step size control (#1798) (@YingboMa)
- doc test and diagram compat (#1800) (@ArnoStrouwen)
- [skip ci] badges (#1801) (@ArnoStrouwen)
- switch to SimpleNonlinearSolve (#1803) (@ChrisRackauckas)

[Diff since v6.31.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.31.1...v6.31.2)

**Merged pull requests:**
- Update return codes on composite solutions (#1795) (@ChrisRackauckas)

[Diff since v6.31.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.31.0...v6.31.1)

**Merged pull requests:**
- don't forget terminated (#1794) (@ChrisRackauckas)

[Diff since v6.30.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.30.1...v6.31.0)

**Closed issues:**
- Segfault precompiling on Julia v1.7.2 (#1791)

**Merged pull requests:**
- Update Benchmarks_WP_Rodas.jl (#1788) (@gstein3m)
- switch `_unwrap_val` to `SciMLBase` (#1790) (@oscardssmith)
- Update Symbol ReturnCodes to ReturnCode (#1793) (@ChrisRackauckas)

[Diff since v6.30.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.30.0...v6.30.1)

**Closed issues:**
- Model with DFBDF is in v6.30 unstable (#1787)

**Merged pull requests:**
- Fix DAE Jacobian reuse (#1789) (@YingboMa)

[Diff since v6.29.3](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.29.3...v6.30.0)

**Closed issues:**
- Saving Jacobians created (#1773)
- Adaptive LinearExponential no more works (#1784)

**Merged pull requests:**
- Don't recompute Jacobian when it's fresh (#1780) (@YingboMa)
- allow precompiling low-storage methods via preferences (#1786) (@ranocha)

[Diff since v6.29.2](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.29.2...v6.29.3)

**Merged pull requests:**
- Check error after each `loop_header!` in `step!` (#1783) (@YingboMa)

[Diff since v6.29.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.29.1...v6.29.2)

[Diff since v6.29.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.29.0...v6.29.1)

**Merged pull requests:**
- ci: use build matrix (#1782) (@thazhemadam)

[Diff since v6.28.1](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.28.1...v6.29.0)

**Merged pull requests:**
- Use `undefmatrix` instead of `zeromatrix` (#1778) (@oscardssmith)
- Added modification and test to allow for AD of LinearExponential (#1779) (@aelmokadem)
- Use a valid returncode (#1781) (@ChrisRackauckas)

[Diff since v6.28.0](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.28.0...v6.28.1)

**Closed issues:**
- Better error message when `dt` cannot be converted to `ttype` (#1776)

**Merged pull requests:**
- Fixed error for LinearExponential algorithm when using Callbacks (#1777) (@albertomercurio)

[Diff since v6.27.2](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v6.27.2...v6.28.0)

**Closed issues:**
- ImplicitEuler and ImplicitMidpoint try to convert LinearAlgebra.LU to LinearAlgebra.QR (#1764)
- non-adaptive `step!` can get stuck in infinite loop (#1769)

**Merged pull requests:**
- Update norecompile.jl (#1770) (@ChrisRackauckas)
- Don't differentiate with respect to tolerances by default (#1772) (@ChrisRackauckas)
- Check that saveat is non-empty before checking its first value in reinit (#1774) (@ChrisRackauckas)