tmpdir: use append, not assignment, for xenv

diff --git a/runner/adt-run b/runner/adt-run
index f8296c51e728bc0c4feb45e34618b84297745e25..47036edbc912f9cb8703b79363cfdb2b2d6270c7 100755 (executable)
--- a/runner/adt-run
+++ b/runner/adt-run
@@ -1161,7 +1161,7 @@ class Test:
                        script += '; chown %s "$1"' % opts.user
                        if 'rw-build-tree' in t.restriction_names:
                                script += '; chown -R %s "$2"' % opts.user
-               xenv = ['TMPDIR=%s' % testtmp]
+               xenv.append('TMPDIR=%s' % testtmp)
                rc = testbed.execute('mktmpdir-'+t.what,
                        ['sh','-xec',script,'x',xenv=xenv,tree.read(True)])
                if rc: bomb("could not create test tmp `%s', exit code %d"