bug#74385: [PATCH 4/4] srfi-64: Report failed tests in (standards)Errors format.

[Tomas Volf <~@wolfsden.cz>]

There is a page in the GNU Standards document regarding the format of error
messages.  Both GNU Emacs and Vim are able to parse it and support jumping to
next/previous error.  My version did not produce a line in this format for
failed tests and this commit rectifies that.

* module/srfi/srfi-64.scm (test-on-test-end-simple)[non-passed]: Write
out (standards)Errors compatible line.

Reported-by: Janneke Nieuwenhuizen <janneke@gnu.org>
---
 module/srfi/srfi-64.scm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/module/srfi/srfi-64.scm b/module/srfi/srfi-64.scm
index 203db49ea..98f6c8114 100644
--- a/module/srfi/srfi-64.scm
+++ b/module/srfi/srfi-64.scm
@@ -28,6 +28,7 @@
   #:use-module (ice-9 format)
   #:use-module (ice-9 match)
   #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-2)
   #:use-module (srfi srfi-9)
   #:use-module (srfi srfi-26)
   #:use-module (srfi srfi-71)
@@ -431,6 +432,10 @@ instead."
               result-kind
               (test-runner-test-name runner))
       (unless (member result-kind '(pass xfail))
+        (and-let* ((file (test-result-ref runner 'source-file))
+                   (line (test-result-ref runner 'source-line)))
+          ;; Satisfy (standards)Errors
+          (format #t "~a:~a: unexpected result~%" file line))
         (maybe-print-prop 'source-file    #f "~a")
         (maybe-print-prop 'source-line    #f "~a")
         (maybe-print-prop 'source-form    #t "~y")
-- 
2.46.0