Wireshark-bugs: [Wireshark-bugs] [Bug 11122] "Export packet dissections > As plain text" crashed
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Fri, 17 Apr 2015 00:23:44 +0000

Comment # 5 on bug 11122 from 
Reproduces on OS X 10.8.5 with a recent top-of-trunk build (and with a
different capture file, so, as I expected, it has nothing to do with the
capture file or with the dissection library).

Top 2 lines of the stack trace from CrashReporter:

0   QtWidgets                         0x0000000112948694
QGridLayout::rowCount() const + 4
1   wireshark                         0x000000010c584150
ExportDissectionDialog::ExportDissectionDialog(QWidget*, _capture_file*,
export_type_e) + 2832 (export_dissection_dialog.cpp:82)

Line 82 of ui/qt/export_dissection_dialog.cpp is

        last_row = fd_grid->rowCount();

The exception is

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008

which means "null pointer dereference" - but the crash is in QGridLayout, so
it's not as if fd_grid is NULL (it would have crashed in
ExportDissectionDialog::ExportDissectionDialog if it had been); something else
is wrong with the QGridLayout to which fd_grid points.

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