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-rwxr-xr-xt/perf/aggregate.perl2
1 files changed, 1 insertions, 1 deletions
diff --git a/t/perf/aggregate.perl b/t/perf/aggregate.perl
index e401208..769d418 100755
--- a/t/perf/aggregate.perl
+++ b/t/perf/aggregate.perl
@@ -70,7 +70,7 @@ if (not @tests) {
}
my $resultsdir = "test-results";
-if ($ENV{GIT_PERF_SUBSECTION} ne "") {
+if (exists $ENV{GIT_PERF_SUBSECTION} and $ENV{GIT_PERF_SUBSECTION} ne "") {
$resultsdir .= "/" . $ENV{GIT_PERF_SUBSECTION};
}