diff --git a/src/compiletest/procsrv.rs b/src/compiletest/procsrv.rs
index e00b864f2e9eb..34918e3918289 100644
--- a/src/compiletest/procsrv.rs
+++ b/src/compiletest/procsrv.rs
@@ -13,23 +13,25 @@ use std::str;
 use std::io::process::{ProcessExit, Process, ProcessConfig, ProcessOutput};
 
 #[cfg(target_os = "win32")]
-fn target_env(lib_path: &str, prog: &str) -> Vec<(~str,~str)> {
-
-    let mut env = os::env();
+fn target_env(lib_path: &str, prog: &str) -> Vec<(~str, ~str)> {
+    let env = os::env();
 
     // Make sure we include the aux directory in the path
     assert!(prog.ends_with(".exe"));
     let aux_path = prog.slice(0u, prog.len() - 4u).to_owned() + ".libaux";
 
-    env = env.map(|pair| {
-        let (k,v) = (*pair).clone();
-        if k == ~"PATH" { (~"PATH", v + ";" + lib_path + ";" + aux_path) }
-        else { (k,v) }
-    });
+    let mut new_env: Vec<_> = env.move_iter().map(|(k, v)| {
+        let new_v = if "PATH" == k {
+            format!("{};{};{}", v, lib_path, aux_path)
+        } else {
+            v
+        };
+        (k, new_v)
+    }).collect();
     if prog.ends_with("rustc.exe") {
-        env.push((~"RUST_THREADS", ~"1"));
+        new_env.push((~"RUST_THREADS", ~"1"));
     }
-    return env;
+    return new_env;
 }
 
 #[cfg(target_os = "linux")]
diff --git a/src/compiletest/runtest.rs b/src/compiletest/runtest.rs
index b07588a914d12..e057909a06cd0 100644
--- a/src/compiletest/runtest.rs
+++ b/src/compiletest/runtest.rs
@@ -529,7 +529,7 @@ fn check_expected_errors(expected_errors: Vec<errors::ExpectedError> ,
                 c
             }
         } ).collect();
-        str::from_chars( c )
+        str::from_chars(c.as_slice())
     }
 
     #[cfg(target_os = "win32")]
diff --git a/src/test/debug-info/basic-types-globals-metadata.rs b/src/test/debug-info/basic-types-globals-metadata.rs
index 943af3d0437f9..efc6fda26e0c0 100644
--- a/src/test/debug-info/basic-types-globals-metadata.rs
+++ b/src/test/debug-info/basic-types-globals-metadata.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
@@ -44,7 +45,9 @@
 // check:type = f64
 // debugger:continue
 
-#[allow(unused_variable)];
+#![allow(unused_variable)]
+#![allow(dead_code)]
+
 
 static B: bool = false;
 static I: int = -1;
diff --git a/src/test/debug-info/basic-types-globals.rs b/src/test/debug-info/basic-types-globals.rs
index 4847144c57f6a..860a383468da1 100644
--- a/src/test/debug-info/basic-types-globals.rs
+++ b/src/test/debug-info/basic-types-globals.rs
@@ -14,6 +14,7 @@
 // about UTF-32 character encoding and will print a rust char as only
 // its numerical value.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/basic-types-mut-globals.rs b/src/test/debug-info/basic-types-mut-globals.rs
index 51391faed7a11..54c2e786ac49d 100644
--- a/src/test/debug-info/basic-types-mut-globals.rs
+++ b/src/test/debug-info/basic-types-mut-globals.rs
@@ -14,6 +14,7 @@
 // about UTF-32 character encoding and will print a rust char as only
 // its numerical value.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/c-style-enum.rs b/src/test/debug-info/c-style-enum.rs
index 7229480b2733e..b570110d8d013 100644
--- a/src/test/debug-info/c-style-enum.rs
+++ b/src/test/debug-info/c-style-enum.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
@@ -70,7 +71,8 @@
 // debugger:print 'c-style-enum::MANUAL_THREE'
 // check:$18 = OneMillion
 
-#[allow(unused_variable)];
+#![allow(unused_variable)]
+#![allow(dead_code)]
 
 enum AutoDiscriminant {
     One,
diff --git a/src/test/debug-info/lexical-scope-in-for-loop.rs b/src/test/debug-info/lexical-scope-in-for-loop.rs
index 5aa6caf612e6e..75f1d779d01fd 100644
--- a/src/test/debug-info/lexical-scope-in-for-loop.rs
+++ b/src/test/debug-info/lexical-scope-in-for-loop.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-win32
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/lexical-scope-in-if.rs b/src/test/debug-info/lexical-scope-in-if.rs
index 719c97a730f63..712880d50f097 100644
--- a/src/test/debug-info/lexical-scope-in-if.rs
+++ b/src/test/debug-info/lexical-scope-in-if.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-win32
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/lexical-scope-in-match.rs b/src/test/debug-info/lexical-scope-in-match.rs
index bdb8416eec5ed..041c8b5c13f27 100644
--- a/src/test/debug-info/lexical-scope-in-match.rs
+++ b/src/test/debug-info/lexical-scope-in-match.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-win32
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/lexical-scopes-in-block-expression.rs b/src/test/debug-info/lexical-scopes-in-block-expression.rs
index 2a3fbecad9dcb..6626d75dc0c98 100644
--- a/src/test/debug-info/lexical-scopes-in-block-expression.rs
+++ b/src/test/debug-info/lexical-scopes-in-block-expression.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-win32
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/simple-struct.rs b/src/test/debug-info/simple-struct.rs
index 5f9789ff620c0..2e1cdeccad2dd 100644
--- a/src/test/debug-info/simple-struct.rs
+++ b/src/test/debug-info/simple-struct.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/simple-tuple.rs b/src/test/debug-info/simple-tuple.rs
index 877b6285d133d..16b0061f25e77 100644
--- a/src/test/debug-info/simple-tuple.rs
+++ b/src/test/debug-info/simple-tuple.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/var-captured-in-nested-closure.rs b/src/test/debug-info/var-captured-in-nested-closure.rs
index 3e4610289ae21..3bf26ae805337 100644
--- a/src/test/debug-info/var-captured-in-nested-closure.rs
+++ b/src/test/debug-info/var-captured-in-nested-closure.rs
@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// ignore-win32: FIXME #10474
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/vec-slices.rs b/src/test/debug-info/vec-slices.rs
index b60e581841174..0c7e2740cd78e 100644
--- a/src/test/debug-info/vec-slices.rs
+++ b/src/test/debug-info/vec-slices.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/debug-info/vec.rs b/src/test/debug-info/vec.rs
index ad88606d48532..635a42d443e15 100644
--- a/src/test/debug-info/vec.rs
+++ b/src/test/debug-info/vec.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32: FIXME #13256
 // ignore-android: FIXME(#10381)
 
 // compile-flags:-g
diff --git a/src/test/run-pass/backtrace.rs b/src/test/run-pass/backtrace.rs
index 7252e319372e6..edf0e195cb38b 100644
--- a/src/test/run-pass/backtrace.rs
+++ b/src/test/run-pass/backtrace.rs
@@ -8,8 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// ignore-win32 FIXME #13259
 // ignore-fast this is executing itself
-#[no_uv];
+#![no_uv]
 
 extern crate native;
 
diff --git a/src/test/run-pass/extern-fn-reachable.rs b/src/test/run-pass/extern-fn-reachable.rs
index d0526b75c966c..d0f12ae7b10c6 100644
--- a/src/test/run-pass/extern-fn-reachable.rs
+++ b/src/test/run-pass/extern-fn-reachable.rs
@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // ignore-fast
+// ignore-win32 dynamic_lib can read dllexported symbols only
 // ignore-linux apparently dlsym doesn't work on program symbols?
 // ignore-android apparently dlsym doesn't work on program symbols?
 // ignore-freebsd apparently dlsym doesn't work on program symbols?