Subject: bug#29492: tests/guix-system.sh failure on unbound variable check

From: Eric Bavier <[email-masked]>
Date: Tue, 28 Nov 2017 19:25:03 +0000

Hello Guix,

Latest guix master (2cdf78df2d3d5d88c7e6908754233cf37cce1e61) fails tests/guix-system.sh for me, on line 128.  This seems to be caused by the fact that the error output contains a multi-character column number:

```
/tmp/bavier/tmpfile:9:14: In procedure #<procedure 3aba2820 ()>:
/tmp/bavier/tmpfile:9:14: GRUB-config: unbound variable
hint: Did you forget a `use-modules' form?
./test-env: line 1: 59998 Terminated              "/home/users/bavier/src/guix/pre-inst-env" "/home/users/bavier/src/guix/guix-daemon" --disable-chroot --substitute-urls="$GUIX_BINARY_SUBSTITUTE_URL"
```

Which is not matched by the current grep pattern.  This patch fixes the issue for me, as a follow-up to commit b70d72ac47fdc9364a64bd22962b2e11524e38b2

```
diff --git a/tests/guix-system.sh b/tests/guix-system.sh
index 4bb866a..2138648 100644
--- a/tests/guix-system.sh
+++ b/tests/guix-system.sh
@@ -123,9 +123,9 @@ else
     then
        # FIXME: With Guile 2.2.0 the error is reported on line 4.
        # See <http://bugs.gnu.org/26107>.
-       grep "$tmpfile:[49]:[0-9]: GRUB-config.*[Uu]nbound variable" "$errorfile"
+       grep "$tmpfile:[49]:[0-9]\+: GRUB-config.*[Uu]nbound variable" "$errorfile"
     else
-       grep "$tmpfile:9:[0-9]: GRUB-config.*[Uu]nbound variable" "$errorfile"
+       grep "$tmpfile:9:[0-9]\+: GRUB-config.*[Uu]nbound variable" "$errorfile"
     fi
 fi

```

Eric Bavier, Scientific Libraries, Cray Inc.