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[sc-dev] trying to catch a trace of sclang crashing (also is: sclang crash on quit (related to #1438?))
Hi, I'm afraid I need some help since I'm not very much into this:
For a while now sclang sporadicly crashes on quitting on my machine.
More than once a week, to name a number.
Sometimes it does so when rebooting or quitting from within the IDE.
Alas it's not really reproducible.
I found issues on github which are likely to be related.
Since this appears to be somewhat obscure I'd like to attach lldb to sclang and see if I can 'catch something'.
So far I did this by launching lldb, then do
process attach --name sclang --waitfor
launch SC, do a
process continue
in lldb to get sclang rolling.
So far only a stop occurred, but this is even more rare than the named crashes.
After quitting sc-ide the sclang icon didn't disappear and lldb showed this (which suggests that Qt is involved - which is not a surprise):
* thread #1: tid = 0x40ff24, 0x0000000106981f00 QtQml`QString::~QString(), queue = 'com.apple.main-thread', stop reason = signal SIGTERM
frame #0: 0x0000000106981f00 QtQml`QString::~QString()
QtQml`QString::~QString():
-> 0x106981f00: pushq %rbp
0x106981f01: movq %rsp, %rbp
0x106981f04: subq $0x10, %rsp
0x106981f08: movq %rdi, %rax
(lldb) process continue
Process 66983 resuming
Process 66983 exited with status = 0 (0x00000000)
it somehow got stuck, but 'continue' worked.
Anyway - I missed to try a
thread backtrace all
so I don't even know if that would have done something useful or was correct to use at all.
So far I only got an OS X crash log from the aformentioned crashes, I can't tell if that would be of any help.
23.11.2015 11:51:52.122 AM ReportCrash[56719]: Saved crash report for sclang[56658] version 3.7 (alpha1) to /Users/mz/Library/Logs/DiagnosticReports/sclang_2015-11-23-115152_cox.crash
What's a good way to get useful information out of this?
thanks a lot, Michael. (OS X 10.8.5, latest build of 3.7a)
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