I tried to use Pulseview functionality of pressing on RUN button to reload input file *.vcd.

> sigrok-cli -d demo --config samplerate=20k --channels D1,D2,D3 --samples 20k -O vcd -o sample.vcd
> pulseview -i sample.vcd -I vcd:downsample=200 -D


1. problem, reported through dbg messages: 
sr: input/vcd: Invalid timestamp: 5977920 (smaller than previous timestamp)

FIX: fixed by adding a line to input/vcd.c
in function reset():
inc->prev_timestamp = 0;

2. problem, segmentation fault when dereferencing vcd_ch
in function free_channel()

FIX:
if (vcd_ch) {
	g_free(vcd_ch->name);
	g_free(vcd_ch->identifier);
	g_free(vcd_ch);
}

3. segmentation fault:

pv::devices::InputFile::run (this=0x555555f84010)
    at /home/luftek/sw/pulseview/pv/devices/inputfile.cpp:172
172		vector<char> buffer(BufferSize);
(gdb) 
174		interrupt_ = false;
(gdb) 
172		vector<char> buffer(BufferSize);
(gdb) 
174		interrupt_ = false;
(gdb) 
175		while (!interrupt_ && !f->eof()) {
(gdb) 
176			f->read(buffer.data(), BufferSize);
(gdb) 
177			const streamsize size = f->gcount();
(gdb) 
178			if (size == 0)
(gdb) 
181			input_->send(buffer.data(), size);
(gdb) 

Thread 8 "pulseview" received signal SIGSEGV, Segmentation fault.
0x00007ffff694adfe in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
(gdb)