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Bug reported upstream:
https://github.com/collectd/collectd/issues/652

Workaround patch by Timo Teräs <timo.teras@iki.fi>

diff -ru collectd-5.4.1.orig/src/processes.c collectd-5.4.1/src/processes.c
--- collectd-5.4.1.orig/src/processes.c	2014-01-26 10:09:14.000000000 -0200
+++ collectd-5.4.1/src/processes.c	2014-06-20 11:58:31.558125613 -0300
@@ -128,9 +128,9 @@
 # include <kstat.h>
 #endif
 
-#ifndef ARG_MAX
-#  define ARG_MAX 4096
-#endif
+/* Force 4k ARG_MAX to make it work as stack allocated buffer */
+#undef ARG_MAX
+#define ARG_MAX 4096
 
 typedef struct procstat_entry_s
 {