diff --git a/base/loading.jl b/base/loading.jl
index 37c173e66e008..62f2622703234 100644
--- a/base/loading.jl
+++ b/base/loading.jl
@@ -3119,6 +3119,7 @@ end
                 f, ftime_req = chi.filename, chi.mtime
                 if ispath(f)
                     # `ispath(f)` is true
+                    @debug "`ispath(f)` is true" f isfile(f) startswith(f, Sys.STDLIB) # TODO: delete this line
                     if isfile(f) && startswith(f, Sys.STDLIB)
                         # mtime is changed by extraction
                         @debug "Skipping mtime check for file $f used by $cachefile, since it is a stdlib"
@@ -3127,6 +3128,7 @@ end
                 else
                     # `ispath(f)` is false
                     _f = fixup_stdlib_path(f)
+                    @debug "`ispath(f)` is false" f _f isfile(_f) startswith(_f, Sys.STDLIB) # TODO: delete this line
                     if isfile(_f) && startswith(_f, Sys.STDLIB)
                         # mtime is changed by extraction
                         @debug "Skipping mtime check for file $f used by $cachefile, since it is a stdlib"