clean up Base.runtests failure print

Author: IanButterworth

base/util.jl

@@ -719,12 +719,16 @@ function runtests(tests = ["all"]; ncores::Int = ceil(Int, Sys.EFFECTIVE_CPU_THR
             Base.DATAROOTDIR, "julia", "test", "runtests.jl")) $tests`, ENV2))
         nothing
     catch
-        buf = PipeBuffer()
-        let InteractiveUtils = Base.require_stdlib(PkgId(UUID(0xb77e0a4c_d291_57a0_90e8_8db25a27a240), "InteractiveUtils"))
-            @invokelatest InteractiveUtils.versioninfo(buf)
+        # evaluate versioninfo in the test environment so the listed env vars are the same
+        vinfo = read(setenv(`$(julia_cmd()) -e 'let InteractiveUtils = Base.require_stdlib(Base.PkgId(Base.UUID(0xb77e0a4c_d291_57a0_90e8_8db25a27a240), "InteractiveUtils")); InteractiveUtils.versioninfo(); end'`, ENV2), String)
+        msg = "A test has failed. Please submit a bug report (https://github.com/JuliaLang/julia/issues)\n" *
+              "including error messages above and the output of versioninfo():\n$(vinfo)"
+        if isinteractive()
+            error(msg)
+        else
+            print(stderr, "ERROR: ", msg)
+            exit(1)
         end
-        error("A test has failed. Please submit a bug report (https://github.com/JuliaLang/julia/issues)\n" *
-              "including error messages above and the output of versioninfo():\n$(read(buf, String))")
     end
 end