only print show(err) suggestion for limited types in REPL

fixes #50575

Author: JeffBezanson

base/errorshow.jl

@@ -772,9 +772,6 @@ function show_backtrace(io::IO, t::Vector)
     if haskey(io, :last_shown_line_infos)
         empty!(io[:last_shown_line_infos])
     end
-    # this will be set to true if types in the stacktrace are truncated
-    limitflag = Ref(false)
-    io = IOContext(io, :stacktrace_types_limited => limitflag)
 
     # t is a pre-processed backtrace (ref #12856)
     if t isa Vector{Any}
@@ -800,9 +797,6 @@ function show_backtrace(io::IO, t::Vector)
         # process_backtrace returns a Vector{Tuple{Frame, Int}}
         show_full_backtrace(io, filtered; print_linebreaks = stacktrace_linebreaks())
     end
-    if limitflag[]
-        print(io, "\nSome type information was truncated. Use `show(err)` to see complete types.")
-    end
     nothing
 end
 

stdlib/REPL/src/REPL.jl

@@ -283,6 +283,18 @@ function print_response(repl::AbstractREPL, response, show_value::Bool, have_col
     end
     return nothing
 end
+
+function repl_display_error(errio::IO, @nospecialize errval)
+    # this will be set to true if types in the stacktrace are truncated
+    limitflag = Ref(false)
+    errio = IOContext(errio, :stacktrace_types_limited => limitflag)
+    Base.invokelatest(Base.display_error, errio, errval)
+    if limitflag[]
+        print(errio, "\nSome type information was truncated. Use `show(err)` to see complete types.")
+    end
+    return nothing
+end
+
 function print_response(errio::IO, response, show_value::Bool, have_color::Bool, specialdisplay::Union{AbstractDisplay,Nothing}=nothing)
     Base.sigatomic_begin()
     val, iserr = response
@@ -292,7 +304,7 @@ function print_response(errio::IO, response, show_value::Bool, have_color::Bool,
             if iserr
                 val = Base.scrub_repl_backtrace(val)
                 Base.istrivialerror(val) || setglobal!(Base.MainInclude, :err, val)
-                Base.invokelatest(Base.display_error, errio, val)
+                repl_display_error(errio, val)
             else
                 if val !== nothing && show_value
                     try
@@ -315,7 +327,7 @@ function print_response(errio::IO, response, show_value::Bool, have_color::Bool,
                 try
                     excs = Base.scrub_repl_backtrace(current_exceptions())
                     setglobal!(Base.MainInclude, :err, excs)
-                    Base.invokelatest(Base.display_error, errio, excs)
+                    repl_display_error(errio, excs)
                 catch e
                     # at this point, only print the name of the type as a Symbol to
                     # minimize the possibility of further errors.