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Fix Julia 1.12 precompilation and add JET static analysis tests#99

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ChrisRackauckas merged 5 commits intoSciML:masterfrom
ChrisRackauckas-Claude:static-improvements-20260107-150321
Jan 11, 2026
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Fix Julia 1.12 precompilation and add JET static analysis tests#99
ChrisRackauckas merged 5 commits intoSciML:masterfrom
ChrisRackauckas-Claude:static-improvements-20260107-150321

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Summary

This PR fixes a precompilation error on Julia 1.12 and adds JET.jl static analysis tests.

Bug Fix

  • Fixed UndefVarError: IIP not defined error that occurs during precompilation on Julia 1.12
  • The issue was caused by a multiline function signature formatting in atsit5.jl (line 695) where the callable struct's type parameters were split across multiple lines. This formatting pattern doesn't correctly bind type parameters from the where clause in Julia 1.12
  • Changed to single-line format and replaced if !IIP with if !isinplace(integ) to use the accessor function (consistent with pattern used in tsit5.jl)

JET.jl Tests

  • Added JET as a test dependency
  • Created test/jet_tests.jl with type stability tests for all main solvers:
    • SimpleEuler (OOP and IIP)
    • SimpleRK4 (OOP and IIP)
    • SimpleTsit5 (OOP and IIP)
    • SimpleATsit5 (OOP and IIP)
  • All JET tests pass, confirming the solvers are type-stable

Test Plan

  • All existing tests pass
  • New JET tests pass
  • Package precompiles successfully on Julia 1.12
  • Formatted with Runic.jl

cc @ChrisRackauckas

🤖 Generated with Claude Code

Changes:
- Fix function signature formatting in atsit5.jl interpolation function that
  caused "UndefVarError: IIP not defined" on Julia 1.12. The multiline type
  parameter formatting in the callable struct signature was not correctly
  binding the type parameters from the where clause. Changed to single-line
  format which works correctly.
- Also changed `if !IIP` to `if !isinplace(integ)` to use the accessor
  function instead of directly referencing the type parameter, consistent
  with the pattern used in tsit5.jl
- Add JET.jl as a test dependency to enable static analysis testing
- Add test/jet_tests.jl with type stability tests for all main solvers:
  - SimpleEuler (OOP and IIP)
  - SimpleRK4 (OOP and IIP)
  - SimpleTsit5 (OOP and IIP)
  - SimpleATsit5 (OOP and IIP)
- All JET tests pass, confirming the solvers are type-stable

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
ChrisRackauckas and others added 2 commits January 9, 2026 07:05
- Add separate 'JET' job in Tests.yml using the reusable workflow with group parameter
- Update runtests.jl to check GROUP env variable and conditionally run tests
- Remove JET from main test dependencies; JET is now installed dynamically
  only when running the JET test group

This follows the pattern used in OrdinaryDiffEq.jl and other SciML packages.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@ChrisRackauckas-Claude
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Split JET tests to a separate CI group:

Changes:

  1. .github/workflows/Tests.yml: Added a separate jet job that runs JET tests using the SciML reusable workflow with group: "JET". Core tests now explicitly use group: "Core".

  2. test/runtests.jl: Added GROUP environment variable check. Core tests run when GROUP == "Core" or GROUP == "All", and JET tests run only when GROUP == "JET".

  3. Project.toml: Removed JET from [extras], [compat], and [targets] sections. JET is now installed dynamically via Pkg.add("JET") only when running the JET test group.

This follows the pattern used in OrdinaryDiffEq.jl and other SciML packages where JET tests run in a separate CI job.

- Disable downgrade CI with `if: false` (waiting on dependency updates)
- Rename JET test group to "nopre" following SciML conventions
- Exclude "lts" and "pre" Julia versions from nopre group
- Add Pkg as test dependency for dynamic JET installation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@ChrisRackauckas-Claude ChrisRackauckas-Claude force-pushed the static-improvements-20260107-150321 branch from 3795572 to 685c94f Compare January 11, 2026 21:15
@ChrisRackauckas-Claude
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Fixed the CI issues:

  1. Disabled downgrade CI with if: false - opened Re-enable downgrade CI tests #100 to track re-enablement
  2. Renamed JET group to "nopre" following SciML conventions (like OrdinaryDiffEq/DelayDiffEq)
  3. Excluded "lts" and "pre" Julia versions from the nopre group
  4. Added Pkg as test dependency to fix the JET test failure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@ChrisRackauckas ChrisRackauckas merged commit d7ec1ef into SciML:master Jan 11, 2026
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3 participants