diff --git a/stdlib/Pkg/src/GraphType.jl b/stdlib/Pkg/src/GraphType.jl
index 35bb07f8eecdc3..e2af668c964068 100644
--- a/stdlib/Pkg/src/GraphType.jl
+++ b/stdlib/Pkg/src/GraphType.jl
@@ -932,7 +932,7 @@ function check_constraints(graph::Graph)
             err_msg = "Resolve failed to satisfy requirements for package $(id(p0)):\n"
         end
         err_msg *= sprint(showlog, rlog, pkgs[p0])
-        throw(ResolverError(err_msg))
+        throw(ResolverError(chomp(err_msg)))
     end
     return true
 end
@@ -1002,7 +1002,7 @@ function propagate_constraints!(graph::Graph, sources::Set{Int} = Set{Int}(); lo
                         err_msg = "Resolve failed to satisfy requirements for package $(id(p1)):\n"
                     end
                     err_msg *= sprint(showlog, rlog, pkgs[p1])
-                    throw(ResolverError(err_msg))
+                    throw(ResolverError(chomp(err_msg)))
                 end
             end
         end
diff --git a/stdlib/Pkg/src/REPLMode.jl b/stdlib/Pkg/src/REPLMode.jl
index b217b663ffd299..ba4ad0c78f54b9 100644
--- a/stdlib/Pkg/src/REPLMode.jl
+++ b/stdlib/Pkg/src/REPLMode.jl
@@ -6,8 +6,8 @@ using UUIDs
 import REPL
 import REPL: LineEdit, REPLCompletions
 
-import ..devdir, ..API
-using ..Types, ..Display, ..Operations
+import ..devdir
+using ..Types, ..Display, ..Operations, ..API
 
 ############
 # Commands #
@@ -236,8 +236,8 @@ function do_cmd(repl::REPL.AbstractREPL, input::String; do_rethrow=false)
         if do_rethrow
             rethrow(err)
         end
-        if err isa CommandError
-            Base.display_error(repl.t.err_stream, ErrorException(err.msg), Ptr{Nothing}[])
+        if err isa CommandError || err isa ResolverError
+            Base.display_error(repl.t.err_stream, ErrorException(sprint(showerror, err)), Ptr{Nothing}[])
         else
             Base.display_error(repl.t.err_stream, err, Base.catch_backtrace())
         end