[apport] grub crashed with SIGSEGV

653 *(t = &(q->v.t)) = (struct huft *) NULL;
(gdb) thread apply all bt full

Thread 1 (process 18276):
#0 0x08055920 in huft_build (b=<value optimized out>, n=19, s=19, d=0x0, e=0x0, t=0xeca52bfc, m=0x806a7f0)
    at gunzip.c:653
        a = 2
        c = {7, 0, 2, 2, 2, 3, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0}
        f = <value optimized out>
        h = 0
        i = 0
        j = 7
        k = 2
        l = 7
        p = (unsigned int *) 0xb7a9b3b8
        q = (struct huft *) 0xeca52c00
        r = {e = 0 '\0', b = 0 '\0', v = {n = 0, t = 0x0}}
        u = {0x0, 0xb7aa6000, 0x7e00, 0x12, 0x0, 0x0, 0xb7a9b908, 0x804ed28, 0xa43b8, 0x0, 0x12, 0x806c7ee, 0x806a800,
  0x2000, 0xb7a9e000, 0xffffffff}
        v = {9, 10, 7, 8, 11, 12, 4, 5, 6, 0, 16, 17, 14, 15, 17, 19, 21, 22, 23, 26, 27, 0, 9, 24, 28, 29, 25, 4, 1, 2,
  106, 114, 144, 264, 265, 13, 14, 15, 17, 20, 22, 24, 25, 34, 40, 41, 46, 48, 50, 52, 54, 56, 66, 68, 69, 72, 76, 80,
  81, 84, 85, 86, 87, 88, 91, 104, 105, 108, 112, 115, 116, 120, 130, 131, 134, 136, 152, 160, 192, 200, 224, 231, 244,
  252, 263, 266, 267, 269, 26, 30, 31, 35, 36, 38, 44, 49, 51, 53, 55, 57, 58, 60, 61, 62, 63, 65, 67, 70, 73, 75, 78,
  82, 89, 90, 92, 96, 97, 98, 99, 102, 107, 110, 111, 118, 121, 122, 124, 132, 133, 140, 145, 147, 153, 156, 158, 162,
  164, 168, 172, 176, 177, 178, 180, 182, 185, 186, 187, 193, 202, 204, 212, 220, 228, 230, 233, 234, 236, 242, 246, 247,
  250, 254, 268, 270, 271, 273, 275, 285, 21, 23, 27, 29, 33, 37, 42, 71, 74, 77, 93, 94, 103, 113, 119, 123, 126, 127,
  129, 135, 138, 142, 146, 148, 150, 154, 159, 161, 170, 173, 174, 184...}
        w = <value optimized out>
        x = {0, 0, 2, 4, 6, 9, 10, 12, 3081353384, 134532127, 134662126, 3081419264, 18, 8014482, 63, 4219119104, 0}
        y = <value optimized out>
        z = <value optimized out>
#1 0x08056312 in gunzip_read (buf=0xb7a9bec0 "\177ELF\001\001\001", len=8192) at gunzip.c:966
        size = <value optimized out>
        srcaddr = <value optimized out>
        ret = 0
#2 0x0805f3cc in load_image (kernel=0xeca52c00 <Address 0xeca52c00 out of bounds>,
    arg=0xb7a38000 "/hurd/boot/gnumach.gz root=device:hd1s2 -s", suggested_type=KERNEL_TYPE_NONE, load_flags=1)
    at boot.c:69
        len = <value optimized out>
        i = <value optimized out>
        exec_type = <value optimized out>
        align_4k = <value optimized out>
        real_entry_addr = <value optimized out>
        type = <value optimized out>
        flags = <value optimized out>
        text_len = <value optimized out>
        data_len = <value optimized out>
        bss_len = <value optimized out>
---Type <return> to continue, or q <return> to quit---
        str = <value optimized out>
        str2 = <value optimized out>
        buffer = "\177ELF\001\001\001\000\000\000\000\000\000\000\000\000\002\000\003\000\001\000\000\000\000\000\020\0004\000\000\000\220�\032\000\000\000\000\0004\000 \000\003\000(\000\006\000\005\000\001\000\000\000\000\020\000\000\000\000\020\000\000\000\020\000;�\031\000;�\031\000\005\000\000\000\000\020\000\000\001\000\000\000@�\031\000@�)\000@�)\000,�\000\000TE\003\000\006\000\000\000\000\020\000\0...

(gdb) p q
$1 = (struct huft *) 0xeca52c00
(gdb) p *q
Cannot access memory at address 0xeca52c00

Thank you for your bug

Feisty is not supported anymore and there is a newer version of grub. Please open a new bug if you still get a crash in a later version of Ubuntu.