diff --git a/rust-version b/rust-version
index 1ba022ac969..0765203ccbc 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-1454bbd4fdac9b7272b93fe82860613dccc0afad
+21867225a74d3b07c2b65e32c67f45197db36896
diff --git a/src/diagnostics.rs b/src/diagnostics.rs
index 1b41ba44183..a20e8126c13 100644
--- a/src/diagnostics.rs
+++ b/src/diagnostics.rs
@@ -137,8 +137,7 @@ pub fn report_error<'tcx, 'mir>(
                 access.uninit_ptr.offset.bytes(),
                 access.uninit_ptr.offset.bytes() + access.uninit_size.bytes(),
             );
-            ecx.memory.dump_alloc(access.uninit_ptr.alloc_id);
-            eprintln!();
+            eprintln!("{:?}", ecx.memory.dump_alloc(access.uninit_ptr.alloc_id));
         }
         _ => {}
     }
diff --git a/src/shims/foreign_items.rs b/src/shims/foreign_items.rs
index 98e66db92da..0379ec0c077 100644
--- a/src/shims/foreign_items.rs
+++ b/src/shims/foreign_items.rs
@@ -1,5 +1,7 @@
 use std::{convert::{TryInto, TryFrom}, iter};
 
+use log::trace;
+
 use rustc_hir::def_id::DefId;
 use rustc_middle::{mir, ty};
 use rustc_target::abi::{Align, Size};
@@ -175,7 +177,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
 
         // Third: functions that return.
         if this.emulate_foreign_item_by_name(link_name, args, dest, ret)? {
-            this.dump_place(*dest);
+            trace!("{:?}", this.dump_place(*dest));
             this.go_to_block(ret);
         }
 
diff --git a/src/shims/intrinsics.rs b/src/shims/intrinsics.rs
index ee64b1ffca4..105026c70d8 100644
--- a/src/shims/intrinsics.rs
+++ b/src/shims/intrinsics.rs
@@ -1,5 +1,7 @@
 use std::iter;
 
+use log::trace;
+
 use rustc_attr as attr;
 use rustc_ast::ast::FloatTy;
 use rustc_middle::{mir, ty};
@@ -524,7 +526,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
             name => throw_unsup_format!("unimplemented intrinsic: {}", name),
         }
 
-        this.dump_place(*dest);
+        trace!("{:?}", this.dump_place(*dest));
         this.go_to_block(ret);
         Ok(())
     }
diff --git a/src/shims/posix/macos/dlsym.rs b/src/shims/posix/macos/dlsym.rs
index 0236b10e5fc..c9f57090ff8 100644
--- a/src/shims/posix/macos/dlsym.rs
+++ b/src/shims/posix/macos/dlsym.rs
@@ -1,5 +1,7 @@
 use rustc_middle::mir;
 
+use log::trace;
+
 use crate::*;
 use helpers::check_arg_count;
 
@@ -42,7 +44,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
             }
         }
 
-        this.dump_place(*dest);
+        trace!("{:?}", this.dump_place(*dest));
         this.go_to_block(ret);
         Ok(())
     }
diff --git a/src/shims/windows/dlsym.rs b/src/shims/windows/dlsym.rs
index 737fd4314f6..91bfedff8db 100644
--- a/src/shims/windows/dlsym.rs
+++ b/src/shims/windows/dlsym.rs
@@ -1,5 +1,7 @@
 use rustc_middle::mir;
 
+use log::trace;
+
 use crate::*;
 use helpers::check_arg_count;
 use shims::windows::sync::EvalContextExt as _;
@@ -73,7 +75,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
             }
         }
 
-        this.dump_place(*dest);
+        trace!("{:?}", this.dump_place(*dest));
         this.go_to_block(ret);
         Ok(())
     }