[Bug 190749] [NEW] Illegal instruction in firefox

[David Kågedal]

Public bug reported:

Binary package hint: firefox

I recently upgraded to 2.0.0.12+2nobinonly+2-0ubuntu0.7.10 and now I
can't even start firefox anymore. I tried removing ~/.mozilla, but it
didn't help.

I'm running gutsy, with everything up-to-date.

What happens is that it runs an illegal instruction and crashes. If I
run "firefox -g", this is what gdb tells me:

Program received signal SIGILL, Illegal instruction.
[Switching to Thread 47618780096368 (LWP 13146)]
nsWindowSH::NewResolve (this=0x9f1a40, wrapper=0xa5b3c0, cx=0x9d6610, 
    obj=0x9ccb30, id=7992484, flags=0, objp=0x7fff9479cec0, 
    _retval=0x7fff9479cecc) at nsDOMClassInfo.cpp:5816
5816    nsDOMClassInfo.cpp: No such file or directory.
        in nsDOMClassInfo.cpp

The instruction at $pc is indeed illegal

(gdb) disassemble $pc $pc+16
Dump of assembler code from 0x2aaaad7cb390 to 0x2aaaad7cb3a0:
0x00002aaaad7cb390 <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1408>:        (bad)  
0x00002aaaad7cb391 <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1409>:        decl   16776772(%rip)        # 0x2aaaae7cb1db
0x00002aaaad7cb397 <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1415>:        sarb   $0xbf,0x6813f0fe(%rdi)
0x00002aaaad7cb39e <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1422>:        mov    $0x13,%dl

(gdb) x/16b $pc
0x2aaaad7cb390 <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1408>:    0xfe    0xff    0x0d    0x44    0xfe    0xff   0x00     0xc0
0x2aaaad7cb398 <_ZN10nsWindowSH10NewResolveEP25nsIXPConnectWrappedNativeP9JSContextP8JSObjectljPS5_Pi+1416>:    0xbf    0xfe    0xf0    0x13    0x68    0xbf   0xb2     0x13

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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Illegal instruction in firefox
https://bugs.launchpad.net/bugs/190749
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