The variable "error" is declared as gboolean, but then assigned via a call to g_object_get() on the "error" property. However, that property is a string (the error message) or NULL if no error. Since g_object_get() is a variadic function, the compiler will not catch this.

On alignement critical architectures the pointer assignement to &error may cause a crash. On others, still some part of the stack may be overwritten.

Fix is simple: declare 

  gpointer error = NULL;

and change the test from

  if (error == TRUE)

to

  if (error != NULL)