linux: make backtrace_symbols return unowned

You are supposed to free() the result of backtrace_symbols, but not
each element in the array.  The current binding will free each element
which will likely result in a crash.  Since we don't currently support
owned arrays of unowned values (bug #571486), making the whole thing
unowned and leaking (unless you call free manually) is the best we can
do right now.

diff --git a/vapi/linux.vapi b/vapi/linux.vapi
index 199ee80114c69aa8702c27d08bad78d180f3168e..da424d56b2e6c447cf1ff4e226e3f73174aa6394 100644 (file)
--- a/vapi/linux.vapi
+++ b/vapi/linux.vapi
@@ -1029,7 +1029,7 @@ namespace Linux {
     public int backtrace (void* buffer, int size);
 
     [CCode (cheader_filename = "execinfo.h", array_length = false)]
-    public string[] backtrace_symbols (void* buffer, int size);
+    public unowned string[] backtrace_symbols (void* buffer, int size);
 
     [CCode (cheader_filename = "execinfo.h")]
     public void backtrace_symbols_fd (void* buffer, int size, int fd);