use Vector{PkgId}

Author: IanButterworth

base/loading.jl

@@ -2501,7 +2501,7 @@ function create_expr_cache(pkg::PkgId, input::String, output::String, output_o::
     # write data over stdin to avoid the (unlikely) case of exceeding max command line size
     write(io.in, """
         empty!(Base.EXT_DORMITORY) # If we have a custom sysimage with `EXT_DORMITORY` prepopulated
-        Base.track_nested_precomp($(repr(vcat(Base.precompilation_stack, pkg.name))))
+        Base.track_nested_precomp($(repr_pkgid_vec(vcat(Base.precompilation_stack, pkg))))
         Base.precompiling_extension = $(loading_extension)
         Base.include_package_for_output($(pkg_str(pkg)), $(repr(abspath(input))), $(repr(depot_path)), $(repr(dl_load_path)),
             $(repr(load_path)), $deps, $(repr(source_path(nothing))))
@@ -2510,14 +2510,25 @@ function create_expr_cache(pkg::PkgId, input::String, output::String, output_o::
     return io
 end
 
-const precompilation_stack = Vector{String}()
+# TODO: remove once https://github.com/JuliaLang/julia/pull/52795 is figured out
+function repr_pkgid(pkg::PkgId)
+    if pkg.uuid === nothing
+        return "$(PkgId)($(repr(pkg.name)))"
+    else
+        return "$(PkgId)($(repr(pkg.uuid)), $(repr(pkg.name)))"
+    end
+end
+repr_pkgid_vec(pkgs::Vector{PkgId}) = "$(PkgId)[" * join(repr_pkgid.(pkgs), ",") * "]"
+
+const precompilation_stack = Vector{PkgId}()
 # Helpful for debugging when precompilation is unexpectedly nested.
 # Enable with `JULIA_DEBUG=nested_precomp`. Note that it expected to be nested in classical code-load precompilation
 # TODO: Add detection if extension precompilation is nested and error / return early?
-function track_nested_precomp(pkg_names::Vector{String})
-    append!(Base.precompilation_stack, pkg_names)
-    if length(Base.precompilation_stack) > 1
-        @debug "Nested precompilation: $(join(Base.precompilation_stack, " > "))" _group=:nested_precomp
+function track_nested_precomp(pkgs::Vector{PkgId})
+    append!(precompilation_stack, pkgs)
+    if length(precompilation_stack) > 1
+        list() = join(map(p->p.name, precompilation_stack), " > ")
+        @debug "Nested precompilation: $(list())" _group=:nested_precomp
     end
 end