diff --git a/.abf.yml b/.abf.yml
index f5ae557..98f0c67 100644
--- a/.abf.yml
+++ b/.abf.yml
@@ -1,4 +1,4 @@
 sources:
-  rust-1.36.0-i686-unknown-linux-gnu.tar.xz: 1a0b4da3128e69404fd267e770494c7f9f23fba2
-  rust-1.36.0-x86_64-unknown-linux-gnu.tar.xz: 88b2547d698f7a54c0a361abfef9e8510a7dcd0c
-  rustc-1.37.0-src.tar.xz: cc02fc6f35e30153f58df3dcea4dcdf148b6194c
+  rust-1.37.0-i686-unknown-linux-gnu.tar.xz: 7cd8b95081047aac2c72028a9b640196f20a0687
+  rust-1.37.0-x86_64-unknown-linux-gnu.tar.xz: 44e711a863821c6f3594d1f44e12437bf253b674
+  rustc-1.38.0-src.tar.xz: 256540e755c20496f01b2e8882b2117e6dc5a2d7
diff --git a/rust.spec b/rust.spec
index 518224f..670f61e 100644
--- a/rust.spec
+++ b/rust.spec
@@ -25,9 +25,9 @@
 # e.g. 1.10.0 wants rustc: 1.9.0-2016-05-24
 # or nightly wants some beta-YYYY-MM-DD
 # Note that cargo matches the program version here, not its crate version.
-%define bootstrap_rust 1.36.0
-%define bootstrap_cargo 1.36.0
-%define bootstrap_date 2019-07-04
+%define bootstrap_rust 1.37.0
+%define bootstrap_cargo 1.37.0
+%define bootstrap_date 2019-08-15
 
 %bcond_without bootstrap
 
@@ -61,7 +61,7 @@
 
 Summary:	The Rust Programming Language
 Name:		rust
-Version:	1.37.0
+Version:	1.38.0
 Release:	1
 License:	(ASL 2.0 or MIT) and (BSD and MIT)
 Group:		Development/Rust
@@ -75,6 +75,8 @@ Source10:	rust.rpmlintrc
 # Revert https://github.com/rust-lang/rust/pull/57840
 # We do have the necessary fix in our LLVM 7.
 Patch1:		rust-pr57840-llvm7-debuginfo-variants.patch
+# Mask a warning-as-error when rebuilding 1.38 with 1.38            
+Patch2:		rustc-1.38.0-rebuild-bootstrap.patch
 BuildRequires:	ncurses-devel
 BuildRequires:	curl
 BuildRequires:	pkgconfig(libcurl)
@@ -351,6 +353,7 @@ test -f '%{local_rust_root}/bin/rustc'
 %setup -qn rustc-%{version}-src
 
 %patch1 -p1 -R
+%patch2 -p1
 
 # python3
 sed -i.try-py3 -e '/try python2.7/i try python3 "$@"' ./configure
@@ -385,6 +388,10 @@ sed -i.ffi -e '$a #[link(name = "ffi")] extern {}' \
 find vendor -name .cargo-checksum.json \
 	-exec sed -i.uncheck -e 's/"files":{[^}]*}/"files":{ }/' '{}' '+'
 
+# Sometimes Rust sources start with #![...] attributes, and "smart" editors think            
+# it's a shebang and make them executable. Then brp-mangle-shebangs gets upset...            
+find -name '*.rs' -type f -perm /111 -exec chmod -v -x '{}' '+'
+
 %build
 %if %{with clang}
 %global optflags %{nil}
diff --git a/rustc-1.38.0-rebuild-bootstrap.patch b/rustc-1.38.0-rebuild-bootstrap.patch
new file mode 100644
index 0000000..07f59a0
--- /dev/null
+++ b/rustc-1.38.0-rebuild-bootstrap.patch
@@ -0,0 +1,10 @@
+--- rustc-1.38.0-src/src/bootstrap/builder.rs	2019-09-23 14:15:52.000000000 -0700
++++ rustc-1.38.0-src/src/bootstrap/builder.rs	2019-09-26 10:45:49.663995011 -0700
+@@ -140,6 +140,7 @@
+ 
+ impl StepDescription {
+     fn from<S: Step>() -> StepDescription {
++        #[allow(unused_unsafe)] // for rebuild bootstrapping
+         StepDescription {
+             default: S::DEFAULT,
+             only_hosts: S::ONLY_HOSTS,