[Freeciv-Dev] (PR#13451) client tech crash when connecting to server

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=13451 >

If I use one client to "start new game" then connect to this pregame
server with another client, the second client crashes:

civclient: tech.c:504: base_total_bulbs_required: Assertion
`pplayer->ai.science_cost > 0' failed.

#2  0xb78ca2df in __assert_fail () from /lib/tls/libc.so.6
#3  0x080c7812 in base_total_bulbs_required (pplayer=0x813c2e4, tech=1)
    at tech.c:504
#4  0x080c70c2 in build_required_techs (pplayer=0x813c2e4, goal=1)
    at tech.c:151
#5  0x080c729c in update_research (pplayer=0x813c2e4) at tech.c:228
#6  0x0806d267 in read_player_info_techs (pplayer=0x813c2e4,
    inventions=0x87b2550 '0' <repeats 89 times>) at packhand.c:1384
#7  0x0806d46c in handle_player_info (pinfo=0x87b2280) at packhand.c:1472
#8  0x0806fb7e in client_handle_packet (type=PACKET_PLAYER_INFO,
    packet=0x87b2280) at packhand_gen.c:141
#9  0x08057c3b in handle_packet_input (packet=0x87b2280, type=39)
    at civclient.c:390
#10 0x0805afc5 in input_from_server (fd=5) at clinet.c:342

-jason