Low-level issue with XCode 4 and MacPorts
samwgoldman at gmail.com
Wed Jun 22 21:28:29 PDT 2011
For what it's worth, here is a reduced program that segfaults if
linked against the macports ncurses.
On Wed, Jun 22, 2011 at 4:45 PM, Joshua Root <jmr at macports.org> wrote:
> On 2011-6-23 06:02 , Sam Goldman wrote:
>> I installed the XCode 4.2 beta w/ iOS 5 on Snow Leopard and then
>> installed a fresh MacPorts on top. MacPorts runs fine, and I tried to
>> install irssi, which installed successfully. However, when I tried to
>> run it, I got the following error:
>> macbook:~ sam$ irssi
>> Terminal doesn't support cursor movement
>> Can't initialize screen handling, quitting.
>> You can still use the dummy mode with -d parameter
>> Thinking perhaps this issue would be resolved upstream, I cleared out
>> my MacPorts and installed from subversion, per the guide. I
>> experienced the same issue.
>> On IRC, someone suggested that I try to install something simpler,
>> htop. htop installed successfully but segfaults when I try to run it.
>> Here is a GDB session with backtrace:
>> macbook:~ sam$ gdb htop
>> GNU gdb 6.3.50-20050815 (Apple version gdb-1700.2) (Thu May 19
>> 01:38:32 UTC 2011)
>> Copyright 2004 Free Software Foundation, Inc.
>> GDB is free software, covered by the GNU General Public License, and you are
>> welcome to change it and/or distribute copies of it under certain conditions.
>> Type "show copying" to see the conditions.
>> There is absolutely no warranty for GDB. Type "show warranty" for details.
>> This GDB was configured as "x86_64-apple-darwin"...Reading symbols for
>> shared libraries ... done
>> (gdb) run
>> Starting program: /opt/local/bin/htop
>> Reading symbols for shared libraries ++. done
>> Program received signal EXC_BAD_ACCESS, Could not access memory.
>> Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000020
>> 0x000000010003d419 in _nc_init_keytry ()
>> (gdb) bt
>> #0 0x000000010003d419 in _nc_init_keytry ()
>> #1 0x000000010003e422 in _nc_keypad ()
>> #2 0x000000010000352d in CRT_init ()
>> #3 0x0000000100004d3b in main ()
>> I think that the issue is very low level, perhaps with curses or
>> terminfo. I'm not sure the best way to confirm or deny.
>> I realize that XCode 4 is beta and not everyone will have it, but I
>> would be happy to help with the debugging effort.
> Probably not the answer you're hoping for, but yes, the current Xcode
> beta seems to be kind of broken and causes runtime errors for several
> programs. See:
> - Josh
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