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-rw-r--r--src/gprs_rlcmac_sched.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/gprs_rlcmac_sched.cpp b/src/gprs_rlcmac_sched.cpp
index b4db88c..8bf2573 100644
--- a/src/gprs_rlcmac_sched.cpp
+++ b/src/gprs_rlcmac_sched.cpp
@@ -330,6 +330,7 @@ int gprs_rlcmac_rcv_rts_block(struct gprs_rlcmac_bts *bts,
/* msg is now available */
/* set USF */
+ OSMO_ASSERT(msgb_length(msg) > 0);
msg->data[0] = (msg->data[0] & 0xf8) | usf;
/* Used to measure the leak rate, count all blocks */