Cairo/Windows ReadOnlyMemoryError()

[cormullion]

When running my tests on CI (both Julia 1.9 - windows-latest - x64 and Julia 1 - windows-latest - x64) I'm seeing a ReadOnlyMemoryError():

 Got exception outside of a @test
  LoadError: ReadOnlyMemoryError()
  Stacktrace:
    [1] get_layout_size
      @ C:\Users\runneradmin\.julia\packages\Cairo\smWIA\src\Cairo.jl:1184 [inlined]
    [2] text(ctx::Cairo.CairoContext, x::Float64, y::Float64, str::String; halign::String, valign::String, angle::Int64, markup::Bool)
      @ Cairo C:\Users\runneradmin\.julia\packages\Cairo\smWIA\src\Cairo.jl:1265
    [3] text
      @ C:\Users\runneradmin\.julia\packages\Cairo\smWIA\src\Cairo.jl:1255 [inlined]

from log here

I don't know what this error means or how significant it is... Tests run OK on MacOS and Linux. Cairo v1.0.5.