Game crashes when clicking victory in single player scenario

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If you win the game it crashes after you click victory I built wargus and stratagus both from their latest commits from master (wargus 828feb5) I can reproduce this reliably by choosing Single player -> Modern Scenario, and beating the computer on "Cramped BNE.pud"

the output at the end using wargus -p is:

play sample 128 game ends

15: First release 1 1: First release 70 15: First release 4 0: First release 7 0: First release 9 15: First release 10 0: First release 54 15: First release 12 0: First release 13 0: First release 59 0: First release 15 0: First release 58 0: First release 17 0: First release 18 0: First release 20 0: First release 61 0: First release 21 0: First release 22 0: First release 60 0: First release 25 0: First release 26 0: First release 29 0: First release 31 0: First release 45 0: First release 33 0: First release 34 0: First release 35 0: First release 36 0: First release 37 0: First release 38 0: First release 39 0: First release 40 unit already free 0: First release 41 0: First release 42 0: First release 43 0: First release 44 0: First release 74 0: First release 46 0: First release 47 0: First release 48 0: First release 57 0: First release 50 0: First release 68 0: First release 55 0: First release 56 1: First release 135 double free or corruption (!prev) $