Runtime crash on macOS after switching SDRs

[mehdideveloper]

This is a new crash I've encountered. Steps to reproduce: 1- Connect a SDR (for example a RTL-SDR) and start it in the program and then stop it. 2- Unplug the SDR and connect another SDR (for example an AirSpy) to the same USB plug. 3- Go to View->Devices and refresh, so the new SDR is shown as green in the list. Select it and click on Close. 4- Open the Settings pane. App will crash.

Here's the log:

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [81967]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_platform.dylib      	0x00007fff65154c92 _platform_strlen + 18
1   libsystem_c.dylib             	0x00007fff65003fdf strdup + 18
2   libsuscan.dylib               	0x000000010a535a09 suscan_source_gain_desc_new + 233 (source.c:76)
3   libsuscan.dylib               	0x000000010a531d1c suscan_source_gain_desc_new_hidden + 44 (source.c:96)
4   libsuscan.dylib               	0x000000010a531a75 suscan_source_config_assert_gain + 197 (source.c:981)
5   libsuscan.dylib               	0x000000010a531fa7 suscan_source_config_set_gain + 39 (source.c:1030)
6   libsuscan.dylib               	0x000000010a532423 suscan_source_config_clone + 499 (source.c:1115)
7   com.yourcompany.SigDigger     	0x000000010a07f445 Suscan::Source::Config::operator=(Suscan::Source::Config const&) + 69
8   com.yourcompany.SigDigger     	0x000000010a028552 SigDigger::ConfigDialog::setProfile(Suscan::Source::Config const&) + 18
9   com.yourcompany.SigDigger     	0x000000010a084578 SigDigger::UIMediator::onTriggerSetup(bool) + 40

[BatchDrake]

Reproduced!