diff --git a/src/librustc_lint/types.rs b/src/librustc_lint/types.rs
index 9b08ddcafab8e..f688bd80ee9da 100644
--- a/src/librustc_lint/types.rs
+++ b/src/librustc_lint/types.rs
@@ -698,7 +698,8 @@ impl LateLintPass for VariantSizeDifferences {
             if gens.ty_params.is_empty() {  // sizes only make sense for non-generic types
                 let t = cx.tcx.node_id_to_type(it.id);
                 let layout = cx.tcx.normalizing_infer_ctxt(ProjectionMode::Any).enter(|infcx| {
-                    t.layout(&infcx).unwrap_or_else(|e| {
+                    let ty = cx.tcx.erase_regions(&t);
+                    ty.layout(&infcx).unwrap_or_else(|e| {
                         bug!("failed to get layout for `{}`: {}", t, e)
                     })
                 });
diff --git a/src/libstd/panicking.rs b/src/libstd/panicking.rs
index a7de9d3a0c5d6..d73e9542d2125 100644
--- a/src/libstd/panicking.rs
+++ b/src/libstd/panicking.rs
@@ -232,9 +232,10 @@ fn default_hook(info: &PanicInfo) {
 pub unsafe fn try<R, F: FnOnce() -> R>(f: F) -> Result<R, Box<Any + Send>> {
     let mut slot = None;
     let mut f = Some(f);
-    let ret;
+    let ret = PANIC_COUNT.with(|s| {
+        let prev = s.get();
+        s.set(0);
 
-    {
         let mut to_run = || {
             slot = Some(f.take().unwrap()());
         };
@@ -247,21 +248,18 @@ pub unsafe fn try<R, F: FnOnce() -> R>(f: F) -> Result<R, Box<Any + Send>> {
                                          dataptr,
                                          &mut any_data,
                                          &mut any_vtable);
+        s.set(prev);
+
         if r == 0 {
-            ret = Ok(());
+            Ok(())
         } else {
-            PANIC_COUNT.with(|s| {
-                let prev = s.get();
-                s.set(prev - 1);
-            });
-            ret = Err(mem::transmute(raw::TraitObject {
+            Err(mem::transmute(raw::TraitObject {
                 data: any_data as *mut _,
                 vtable: any_vtable as *mut _,
-            }));
+            }))
         }
-    }
+    });
 
-    debug_assert!(PANIC_COUNT.with(|c| c.get() == 0));
     return ret.map(|()| {
         slot.take().unwrap()
     });
diff --git a/src/test/compile-fail/issue-34839.rs b/src/test/compile-fail/issue-34839.rs
new file mode 100644
index 0000000000000..be7e782002048
--- /dev/null
+++ b/src/test/compile-fail/issue-34839.rs
@@ -0,0 +1,31 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait RegularExpression: Sized {
+    type Text;
+}
+
+struct ExecNoSyncStr<'a>(&'a u8);
+
+impl<'c> RegularExpression for ExecNoSyncStr<'c> {
+    type Text = u8;
+}
+
+struct FindCaptures<'t, R>(&'t R::Text) where R: RegularExpression, R::Text: 't;
+
+enum FindCapturesInner<'r, 't> {
+    Dynamic(FindCaptures<'t, ExecNoSyncStr<'r>>),
+}
+
+#[rustc_error]
+fn main() {}    //~ ERROR compilation successful