[Cin] iris square transition crash (termux/arm)

[Phyllis Smith]

Andrew,
WOW, highly reproducible -- I can not believe you found this as it is
always hard to remember what was done to cause the problem.
The fix works Great! to stop the crash and I will check it into GIT next
time I power up the desktop.
What was the purpose of the previous email: "illustration about 'iris
square; transition"?  Was it just to show that it does not work correctly
in the case of the steps outlined here?  Thanks, Phyllis
Inbox

On Fri, Aug 27, 2021 at 12:31 PM Andrew Randrianasulu via Cin <
cin at lists.cinelerra-gg.org> wrote:

> for me attached patch seems to fix crash (because 'add silence'
> apparently  add second transition with duration exactly 0.000 sec - so we
> crash trying to process this)
>
>
>
> On Friday, August 27, 2021, Andrew Randrianasulu <randrianasulu at gmail.com>
> wrote:
>
>> for future history:
>>
>> [New LWP 26812]
>> --Type <RET> for more, q to quit, c to continue without paging--
>>
>> Thread 156 "cin" received signal SIGFPE, Arithmetic exception.
>> [Switching to LWP 26812]
>> 0xf7316cf8 in tgkill ()
>>    from /apex/com.android.runtime/lib/bionic/libc.so
>> (gdb) bt full
>> #0 0xf7316cf8 in tgkill ()
>>    from /apex/com.android.runtime/lib/bionic/libc.so
>> No symbol table info available.
>> #1 0xf5e3aa40 in __aeabi_ldiv0 ()
>>     at
>> /buildbot/src/android/gcc/toolchain/build/../gcc/gcc-4.9/libgcc/config/arm/lib1funcs.S:1337
>> No locals.
>> #2 0xf5e36740 in IrisSquareMain::process_realtime (this=0xf6044000,
>>     incoming=0xf1959740, outgoing=0xf1959900) at irissquare.C:312
>>         h = <optimized out>
>>         w = <optimized out>
>> #3 0x00b36dc4 in PluginServer::process_transition(VFrame*, VFrame*, long
>> long, long long) ()
>> No symbol table info available.
>> #4 0x00bea320 in VModule::render(VFrame*, long long, int, double, int,
>> int, int) ()
>> No symbol table info available.
>> #5 0x00be7fd8 in VirtualVNode::read_data(VFrame*, long long, double, int)
>> ()
>> No symbol table info available.
>> #6 0x00be824c in VirtualVNode::render_as_module(VFrame*, VFrame*, long
>> long, double, int) ()
>> No symbol table info available.
>> #7 0x00be8070 in VirtualVNode::render(VFrame*, long long, double, int) ()
>> No symbol table info available.
>> #8 0x00be7aa0 in VirtualVConsole::process_buffer(long long, int) ()
>> No symbol table info available.
>> #9 0x00bef280 in VRender::process_buffer(long long, int) ()
>> No symbol table info available.
>> #10 0x00bef804 in VRender::run() ()
>> --Type <RET> for more, q to quit, c to continue without paging--
>> No symbol table info available.
>> #11 0x00cc04d4 in Thread::entrypoint(void*) ()
>> No symbol table info available.
>> #12 0xf7325544 in __pthread_start(void*) ()
>>    from /apex/com.android.runtime/lib/bionic/libc.so
>> No symbol table info available.
>> #13 0xf72dfc44 in __start_thread ()
>>    from /apex/com.android.runtime/lib/bionic/libc.so
>> No symbol table info available.
>> #14 0x00000000 in ?? ()
>> No symbol table info available.
>> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
>>
>> ---
>>
>> part of gdb session...
>>
>> for reproduction.
>>
>> 1) load video
>> 2) seek to some frame by setting there playhead/cursor on timeline
>> 3) apply edit > cut (x) {blade cut}
>> 4) attach iris square transition from video > attach transition menu.
>> 5) set in point at very same frame
>> 6) move cursor a bit after transition bar ended..
>> 7) set out point
>> 8) use edit>add silence..
>>
>> in my case it crashes....
>>
>> --
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>
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