[PATCH 1/4] rproxy: bail out early on errors reading /proc/$$/cmdline

[Eric Wong <e@80x24.org>]

I'm not sure if it's really an issue, but it it narrows down
the places where uninitialized variable warnings can happen.
---
 lib/Devel/Mwrap/Rproxy.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Devel/Mwrap/Rproxy.pm b/lib/Devel/Mwrap/Rproxy.pm
index c96a947..29225c1 100644
--- a/lib/Devel/Mwrap/Rproxy.pm
+++ b/lib/Devel/Mwrap/Rproxy.pm
@@ -29,7 +29,7 @@ my $valid_pid = $^O eq 'linux' ? sub {
 	my ($pid) = @_;
 	if (open(my $fh, '<', "/proc/$pid/cmdline")) {
 		local $/;
-		my $str = <$fh>;
+		my $str = <$fh> // return;
 		$str =~ tr/\0/ /;
 		Plack::Util::encode_html($str);
 	}