ModelingToolkitSIExt tests hang on Julia pre-release (1.12-DEV) #492
Description
Description
The ModelingToolkitSIExt extension tests consistently hang on Julia pre-release (1.12-DEV), causing a 6-hour CI timeout in the CI_extensions.yml workflow.
Evidence
- CI run #21164817483 (master push, Jan 20):
test (ModelingToolkitSIExt, pre)timed out at 6h - CI run #21622987614 (y_saturation PR, Feb 3): same timeout
test (ModelingToolkitSIExt, 1)passes fine (~37-41 min)
Observed behavior
From the CI logs, after Pkg.add completes for ModelingToolkit and Symbolics (finishing precompilation at ~21:28), the test process hangs with no output until the 6-hour job timeout at ~03:08. The job is then cancelled and orphan Julia processes are terminated.
Workaround
Removed pre from the CI_extensions.yml version matrix in #492. The main CI workflow still tests Core and QA groups on pre-release Julia, which pass fine.
Root cause
Likely an upstream issue with ModelingToolkit or one of its dependencies (Symbolics, ModelingToolkitBase, etc.) on Julia 1.12-DEV. The hang occurs during test execution, not during precompilation.
Action needed
Re-enable pre testing in CI_extensions.yml once ModelingToolkit works on Julia 1.12 pre-release.