Author: Kerin Millar <kfm@plushkava.net>
Date:   Sun Jan 3 07:08:10 2021 +0000

    Fix test for presence of BASH_LINENO[0]
    
    eval is not some sort of magical sandbox for executing code that might cause
    the shell's parser to take exception. Render the test resilient by carrying
    it out within a subshell. While at it, position the redirection so that
    STDERR is, in fact, muted.
    
    Signed-off-by: Kerin Millar <kfm@plushkava.net>
    Reported-by: Paolo Pedroni <paolo.pedroni@iol.it>
    Closes: https://bugs.gentoo.org/738810

diff -ur a/tests/test-lib.sh b/tests/test-lib.sh
--- a/tests/test-lib.sh	2021-01-03 07:03:32.343122695 +0000
+++ b/tests/test-lib.sh	2021-01-03 07:05:11.232560313 +0000
@@ -113,7 +113,7 @@
     exit $status
 }
 
-if eval 'test -n "${BASH_LINENO[0]}" 2>/dev/null'; then
+if ( eval 'test -n "${BASH_LINENO[0]}"' 2>/dev/null ); then
     eval '
 	_start_test() {
 	    printf "[${BASH_LINENO[2]}] %s -- " "$*"