Subject: bug#48089: Guile 3.0.6 returns zero-indexed locations for ‘read-error’

From: Ludovic Courtès <[email-masked]>
Date: Thu, 29 Apr 2021 11:33:27 +0200

Ludovic Courtès <[email-masked]> skribis:

> Guile 3.0.6 returns zero-indexed (instead of one-indexed) source code
> locations for ‘read-error’.  Here’s a 3.0.6/3.0.5 comparison:
>
> $ /gnu/store/r2nr74rwhpqg16y1lyi6l0jn3lwx4yyz-guile-3.0.6/bin/guile  <(echo '(')
> ice-9/read.scm:126:4: In procedure lp:
> /dev/fd/63:1:0: unexpected end of input while searching for: )
> $ guile  <(echo '(')
> ERROR: In procedure primitive-load:
> In procedure scm_i_lreadparen: /dev/fd/63:2:1: end of file

Here’s a test case waiting to succeed!  :-)

diff --git a/test-suite/tests/reader.test b/test-suite/tests/reader.test
index fad531b39..231e69553 100644
--- a/test-suite/tests/reader.test
+++ b/test-suite/tests/reader.test
@@ -212,6 +212,18 @@
 
 
 (with-test-prefix "mismatching parentheses"
+  (pass-if-equal "read-error location"
+      '("foo.scm:3:1: unexpected end of input while searching for: ~A" #\))
+    (catch 'read-error
+      (lambda ()
+        ;; The missing closing paren error should be located on line 3,
+        ;; column 1 (one-indexed).
+        (call-with-input-string "\n    (hi there!\n"
+          (lambda (port)
+            (set-port-filename! port "foo.scm")
+            (read port))))
+      (lambda (key proc message args . _)
+        (cons message args))))
   (pass-if-exception "opening parenthesis"
     exception:eof
     (read-string "("))

Ludo’.