ESP8266 Rebooting Divide by Zero

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08:32:44.803 -> Guru Meditation Error: Core  1 panic'ed (IntegerDivideByZero). Exception was unhandled.
08:32:44.803 -> Core 1 register dump:
08:32:44.803 -> PC      : 0x400d0e80  PS      : 0x00060330  A0      : 0x800d0f4f  A1      : 0x3ffb1f40
08:32:44.803 -> A2      : 0x000000dc  A3      : 0x00000001  A4      : 0x00000000  A5      : 0x00000001
08:32:44.803 -> A6      : 0x00007080  A7      : 0x00060023  A8      : 0x00000000  A9      : 0x0000000a
08:32:44.840 -> A10     : 0x0000000a  A11     : 0x0000000a  A12     : 0x00000050  A13     : 0x000000cc
08:32:44.840 -> A14     : 0x000000b0  A15     : 0x000000ff  SAR     : 0x0000000a  EXCCAUSE: 0x00000006
08:32:44.840 -> EXCVADDR: 0x00000000  LBEG    : 0x00000000  LEND    : 0x00000000  LCOUNT  : 0x00000000
08:32:44.840 ->
08:32:44.840 -> ELF file SHA256: 0000000000000000
08:32:44.840 ->
08:32:44.840 -> Backtrace: 0x400d0e80:0x3ffb1f40 0x400d0f4c:0x3ffb1f60 0x400d1b79:0x3ffb1fb0 0x400860b1:0x3ffb1fd0
08:32:44.878 ->
08:32:44.878 -> Rebooting.. 00:22:57
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08:32:44.878 -> ets Jun  8 2016
08:32:44.878 ->
08:32:44.878 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
08:32:44.878 -> configsip: 0, SPIWP:0xee
08:32:44.878 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
08:32:44.878 -> mode:DIO, clock div:1
08:32:44.878 -> load:0x3fff0018,len:4
08:32:44.878 -> load:0x3fff001c,len:1044
08:32:44.878 -> load:0x40078000,len:10124
08:32:44.878 -> load:0x40080400,len:5856
08:32:44.878 -> entry 0x400806a8
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