OsmocomBB

Since recently (maybe one or even two months ago) when using osmocom-bb/mobile I started seeing these warnings printed by osmo-bsc:

DRSL DEBUG abis_rsl.c:1519 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=5 meas_rep_last_seen_nr=4
DRR ERROR gsm_04_08_rr.c:1005 Invalid BCCH channel list index 0 in measurement report
DRSL DEBUG abis_rsl.c:1519 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=6 meas_rep_last_seen_nr=5
DRR ERROR gsm_04_08_rr.c:1005 Invalid BCCH channel list index 0 in measurement report
DRSL DEBUG abis_rsl.c:1519 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=7 meas_rep_last_seen_nr=6
DRR ERROR gsm_04_08_rr.c:1005 Invalid BCCH channel list index 0 in measurement report
DRSL DEBUG abis_rsl.c:1519 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=8 meas_rep_last_seen_nr=7
DRR ERROR gsm_04_08_rr.c:1005 Invalid BCCH channel list index 0 in measurement report
DRSL DEBUG abis_rsl.c:1519 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=9 meas_rep_last_seen_nr=8
DRR ERROR gsm_04_08_rr.c:1005 Invalid BCCH channel list index 0 in measurement report

Please find a PCAP file attached. Here is one of the measurement reports as decoded by wireshark:

GSM A-I/F DTAP - Measurement Report
    Protocol Discriminator: Radio Resources Management messages (6)
    DTAP Radio Resources Management Message Type: Measurement Report (0x15)
    Measurement Results
        1... .... = BA-USED: 1
        .0.. .... = DTX-USED: DTX was not used
        ..11 1111 = RXLEV-FULL-SERVING-CELL: >= -48 dBm (63)
        0... .... = 3G-BA-USED: 0
        .0.. .... = MEAS-VALID: The measurement results are valid
        ..11 1111 = RXLEV-SUB-SERVING-CELL: >= -48 dBm (63)
        0... .... = SI23_BA_USED: 0
        .000 .... = RXQUAL-FULL-SERVING-CELL: BER < 0.2%, Mean value 0.14% (0)
        .... 000. = RXQUAL-SUB-SERVING-CELL: BER < 0.2%, Mean value 0.14% (0)
        .... ...1  10.. .... = NO-NCELL-M: 6 neighbour cell measurement result (6)
        ..10 1110 = RXLEV-NCELL: 46
        0000 0... = BCCH-FREQ-NCELL: 0
        .... .000  000. .... = BSIC-NCELL: 0
        ...1 0111  0... .... = RXLEV-NCELL: 46
        .000 00.. = BCCH-FREQ-NCELL: 0
        .... ..00  0000 .... = BSIC-NCELL: 0
        .... 1011  10.. .... = RXLEV-NCELL: 46
        ..00 000. = BCCH-FREQ-NCELL: 0
        .... ...0  0000 0... = BSIC-NCELL: 0
        .... .101  110. .... = RXLEV-NCELL: 46
        ...0 0000 = BCCH-FREQ-NCELL: 0
        0000 00.. = BSIC-NCELL: 0
        .... ..10  1110 .... = RXLEV-NCELL: 46
        .... 0000  0... .... = BCCH-FREQ-NCELL: 0
        .000 000. = BSIC-NCELL: 0
        .... ...1  0111 0... = RXLEV-NCELL: 46
        .... .000  00.. .... = BCCH-FREQ-NCELL: 0
        ..00 0000 = BSIC-NCELL: 0
        No space for padding bits

I am running my own network with only one BCCH carrier, no neighbors. Looks like a regression is the mobile app to me.