Crash when scrolling mouse over FFT and waterfall.

[fksms]

Hardware

• CPU: Apple M1
• RAM: 8GB
• GPU:
• SDR: USRP B210

Software

• Operating System: MacOS 14.4.1
• SDR++: Nightly Build (currently 1.1.0)

Bug Description
Crash when scrolling mouse over FFT and waterfall.

The crash report is below.

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000028
Exception Codes: 0x0000000000000001, 0x0000000000000028

Termination Reason: Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process: exc handler [5819]

VM Region Info: 0x28 is not in any region. Bytes before following region: 4342415320
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 102d40000-102d44000 [ 16K] r-x/r-x SM=COW /Applications/SDR++.app/Contents/MacOS/sdrpp

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsdrpp_core.dylib 0x103411820 MainWindow::draw() + 8408
1 libsdrpp_core.dylib 0x103411820 MainWindow::draw() + 8408
2 libsdrpp_core.dylib 0x1034fdc70 backend::renderLoop() + 1840
3 libsdrpp_core.dylib 0x1033e78a8 sdrpp_main(int, char**) + 28644
4 dyld 0x18252a0e0 start + 2360

Additional info

The application crashes because if(vfo != null) is missing in the following part.
It looks like you are assigning an undefined value.
After modifying the code, the crash no longer occurs.

SDRPlusPlus/core/src/gui/main_window.cpp

Lines 581 to 589 in e1c48e9

	if (ImGui::IsKeyDown(ImGuiKey_LeftShift)) {
	interval = vfo->snapInterval * 10.0;
	}
	else if (ImGui::IsKeyDown(ImGuiKey_LeftAlt)) {
	interval = vfo->snapInterval * 0.1;
	}
	else {
	interval = vfo->snapInterval;
	}

I will submit a pull request if needed.

[AlexandreRouma]

Fixed