Comment 2 for bug 1883729

Attaching a QTest reproducer.
./i386-softmmu/qemu-system-i386 -device nec-usb-xhci -trace usb\* \
-device usb-audio -device usb-storage,drive=mydrive \
-drive id=mydrive,file=null-co://,size=2M,format=raw,if=none \
-nodefaults -nographic -qtest stdio < repro

Close to the crash:
21000@1597111713.503068:usb_xhci_slot_configure slotid 58
21000@1597111713.503074:usb_xhci_ep_disable slotid 58, epid 2
21000@1597111713.503077:usb_xhci_ep_enable slotid 58, epid 2
21000@1597111713.503085:usb_xhci_ep_disable slotid 58, epid 6
21000@1597111713.503088:usb_xhci_ep_enable slotid 58, epid 6
21000@1597111713.503092:usb_xhci_ep_disable slotid 58, epid 24
21000@1597111713.503095:usb_xhci_ep_enable slotid 58, epid 24
21000@1597111713.503099:usb_xhci_ep_disable slotid 58, epid 25
21000@1597111713.503102:usb_xhci_ep_enable slotid 58, epid 25
21000@1597111713.503106:usb_xhci_ep_disable slotid 58, epid 29
21000@1597111713.503109:usb_xhci_ep_enable slotid 58, epid 29
21000@1597111713.503113:usb_xhci_ep_disable slotid 58, epid 30
21000@1597111713.503116:usb_xhci_ep_enable slotid 58, epid 30
21000@1597111713.503121:usb_xhci_fetch_trb addr 0x0000000000000b20, CR_ENABLE_SLOT, p 0x0000000000000000, s 0x00000000, c 0x00002700
21000@1597111713.503127:usb_xhci_slot_enable slotid 59
21000@1597111713.503130:usb_xhci_fetch_trb addr 0x0000000000000b30, CR_SET_TR_DEQUEUE, p 0x0000000000000000, s 0x00000000, c 0x00004300
21000@1597111713.503135:usb_xhci_fetch_trb addr 0x0000000000000b40, CR_ENABLE_SLOT, p 0x0000000000000000, s 0x00000000, c 0x00002700
21000@1597111713.503140:usb_xhci_slot_enable slotid 60
21000@1597111713.503143:usb_xhci_fetch_trb addr 0x0000000000000b50, CR_EVALUATE_CONTEXT, p 0x0000000000000000, s 0x00000000, c 0x00003600
21000@1597111713.503149:usb_xhci_fetch_trb addr 0x0000000000000b60, CR_STOP_ENDPOINT, p 0x0000000000000000, s 0x00000000, c 0x3afd3c00
21000@1597111713.503154:usb_xhci_ep_stop slotid 58, epid 29
21000@1597111713.503159:usb_xhci_ep_state slotid 58, epid 29, running -> stopped
21000@1597111713.503163:usb_xhci_fetch_trb addr 0x0000000000000b70, CR_ENABLE_SLOT, p 0x0000000000000000, s 0x00000000, c 0x00002700
21000@1597111713.503168:usb_xhci_slot_enable slotid 61
21000@1597111713.503171:usb_xhci_fetch_trb addr 0x0000000000000b80, CR_SET_TR_DEQUEUE, p 0x0000000000000000, s 0x00000000, c 0x3afd4300
21000@1597111713.503177:usb_xhci_ep_set_dequeue slotid 58, epid 29, streamid 0, ptr 0x0000000000000000
qemu-system-i386: hw/usb/hcd-xhci.c:1016: XHCIStreamContext *xhci_find_stream(XHCIEPContext *, unsigned int, uint32_t *): Assertion `streamid != 0' failed.
Aborted