[education/rkward] rkward/rbackend: Add more error handling

[Thomas Friedrichsmeier]

Git commit e76a1f56f684748c04b28e5ff9f6aed935bec8d1 by Thomas Friedrichsmeier.
Committed on 02/08/2024 at 13:16.
Pushed by tfry into branch 'master'.

Add more error handling

M  +8    -2    rkward/rbackend/rkrbackend_dlopen.cpp

https://invent.kde.org/education/rkward/-/commit/e76a1f56f684748c04b28e5ff9f6aed935bec8d1

diff --git a/rkward/rbackend/rkrbackend_dlopen.cpp b/rkward/rbackend/rkrbackend_dlopen.cpp
index c487b85ef..4dac871df 100644
--- a/rkward/rbackend/rkrbackend_dlopen.cpp
+++ b/rkward/rbackend/rkrbackend_dlopen.cpp
@@ -61,9 +61,15 @@ auto loadlib(const char* name) {
 
 #if !(defined(Win32) || defined(__APPLE__))
 auto loadGlib(unsigned int *version) {
+	*version = 0;
 	auto glib = dlopen("libglib-2.0.so", RTLD_LAZY | RTLD_LOCAL);
-	auto glib_verp = static_cast<unsigned int *>(resolve_symb(glib, "glib_minor_version"));
-	*version = glib_verp ? (*glib_verp) : 0;
+	if (glib) {
+		dlerror();
+		auto glib_verp = static_cast<unsigned int *>(resolve_symb(glib, "glib_minor_version")); // Major version is always "2"
+		if (glib_verp && !dlerror()) {
+			*version = *glib_verp;
+		}
+	}
 	return glib;
 }