fix: stabilize runtime follow-up regressions

src/lib/sys.cpp

@@ -17,17 +17,12 @@ constexpr f64 FILE_LOCK_WAIT_TIMEOUT_SECONDS = 3.0;
 
 }
 
-String capture_backtrace_string(u32 max_frames, u32 skip_frames)
+String backtrace_frames_string(void* const* frames, size_t size, u32 skip_frames)
 {
-	if(max_frames == 0)
-		return("");
-
-	std::vector<void*> frames(max_frames);
-	size_t size = backtrace(frames.data(), max_frames);
 	if(size == 0)
 		return("");
 
-	char** symbols = backtrace_symbols(frames.data(), size);
+	char** symbols = backtrace_symbols(frames, size);
 	if(!symbols)
 		return("");
 
@@ -38,7 +33,17 @@ String capture_backtrace_string(u32 max_frames, u32 skip_frames)
 		trace += "\n";
 	}
 	free(symbols);
- 	return(trace);
+	return(trace);
+}
+
+String capture_backtrace_string(u32 max_frames, u32 skip_frames)
+{
+	if(max_frames == 0)
+		return("");
+
+	std::vector<void*> frames(max_frames);
+	size_t size = backtrace(frames.data(), max_frames);
+	return(backtrace_frames_string(frames.data(), size, skip_frames));
 }
 
 String signal_name(int sig)