From 08bc0721415c54033dbd64934b2b3d10835fce36 Mon Sep 17 00:00:00 2001
From: Michael Woerister <michaelwoerister@gmail>
Date: Fri, 13 Dec 2013 12:04:42 +0100
Subject: [PATCH] debuginfo: Clear debug source locations at beginning of
 functions.

---
 src/librustc/middle/trans/debuginfo.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librustc/middle/trans/debuginfo.rs b/src/librustc/middle/trans/debuginfo.rs
index 97d8ed92b4b..71cc6109a47 100644
--- a/src/librustc/middle/trans/debuginfo.rs
+++ b/src/librustc/middle/trans/debuginfo.rs
@@ -687,6 +687,9 @@ pub fn create_function_debug_context(cx: &mut CrateContext,
     let arg_pats = fn_decl.inputs.map(|arg_ref| arg_ref.pat);
     populate_scope_map(cx, arg_pats, top_level_block, fn_metadata, &mut fn_debug_context.scope_map);
 
+    // Clear the debug location so we don't assign them in the function prelude
+    set_debug_location(cx, UnknownLocation);
+
     return FunctionDebugContext(fn_debug_context);
 
     fn get_function_signature(cx: &mut CrateContext,