display fix for unlikely but possible type inference failure in bootstrap table

Author: palday

NEWS.md

@@ -1,3 +1,7 @@
+MixedModels v5.0.3 Release Notes
+==============================
+- Small update in some code related to displaying dispersion parameters in cases where inference has failed. [#865]
+
 MixedModels v5.0.2 Release Notes
 ==============================
 - The default display and `confint` methods for bootstrap results from models without dispersion parameters has been fixed. [#861]
@@ -695,3 +699,4 @@ Package dependencies
 [#858]: https://github.com/JuliaStats/MixedModels.jl/issues/858
 [#860]: https://github.com/JuliaStats/MixedModels.jl/issues/860
 [#861]: https://github.com/JuliaStats/MixedModels.jl/issues/861
+[#865]: https://github.com/JuliaStats/MixedModels.jl/issues/865

Project.toml

@@ -1,7 +1,7 @@
 name = "MixedModels"
 uuid = "ff71e718-51f3-5ec2-a782-8ffcbfa3c316"
 author = ["Phillip Alday <[email protected]>", "Douglas Bates <[email protected]>"]
-version = "5.0.2"
+version = "5.0.3"
 
 [deps]
 Arrow = "69666777-d1a9-59fb-9406-91d4454c9d45"

src/bootstrap.jl

@@ -359,7 +359,10 @@ function StatsBase.confint(
     par = filter(collect(propertynames(tbl))) do k
         k = string(k)
         # σ is missing in models without a dispersion parameter
-        if k == "σ" && Missing <: eltype(tbl.σ)
+        Tσ = eltype(tbl.σ)
+        # see https://github.com/JuliaStats/MixedModels.jl/pull/861#discussion_r2323094090
+        # for more info on why this logic is so convulated
+        if k == "σ" &&  ((Tσ === Any && any(ismissing, tbl.σ)) ||  Missing <: Tσ)
             return false
         end
         return !startswith(k, 'θ') && k != "obj"