diff --git a/.gitignore b/.gitignore
index becac4e..c43d28a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -321,3 +321,10 @@
 /rust-1.48.0-powerpc64-unknown-linux-gnu.tar.xz
 /rust-1.48.0-s390x-unknown-linux-gnu.tar.xz
 /rust-1.48.0-x86_64-unknown-linux-gnu.tar.xz
+/rustc-1.50.0-src.tar.xz
+/rust-1.49.0-aarch64-unknown-linux-gnu.tar.xz
+/rust-1.49.0-armv7-unknown-linux-gnueabihf.tar.xz
+/rust-1.49.0-i686-unknown-linux-gnu.tar.xz
+/rust-1.49.0-powerpc64le-unknown-linux-gnu.tar.xz
+/rust-1.49.0-s390x-unknown-linux-gnu.tar.xz
+/rust-1.49.0-x86_64-unknown-linux-gnu.tar.xz
diff --git a/0001-Revert-Auto-merge-of-79547.patch b/0001-Revert-Auto-merge-of-79547.patch
new file mode 100644
index 0000000..b2e58a1
--- /dev/null
+++ b/0001-Revert-Auto-merge-of-79547.patch
@@ -0,0 +1,102 @@
+From eaf7ea1fc339e1ff348ed941ed2e8c4d66f3e458 Mon Sep 17 00:00:00 2001
+From: Josh Stone <jistone@redhat.com>
+Date: Thu, 18 Feb 2021 19:14:58 -0800
+Subject: [PATCH] Revert "Auto merge of #79547 - erikdesjardins:byval,
+ r=nagisa"
+
+This reverts commit a094ff9590b83c8f94d898f92c2964a5803ded06, reversing
+changes made to d37afad0cc87bf709ad10c85319296ac53030f03.
+---
+ compiler/rustc_middle/src/ty/layout.rs               | 12 ++++++------
+ ...return-value-in-reg.rs => return-value-in-reg.rs} |  4 ++--
+ src/test/codegen/union-abi.rs                        | 11 +++--------
+ 3 files changed, 11 insertions(+), 16 deletions(-)
+ rename src/test/codegen/{arg-return-value-in-reg.rs => return-value-in-reg.rs} (74%)
+
+diff --git a/compiler/rustc_middle/src/ty/layout.rs b/compiler/rustc_middle/src/ty/layout.rs
+index b545b92c9252..545f6aee1a21 100644
+--- a/compiler/rustc_middle/src/ty/layout.rs
++++ b/compiler/rustc_middle/src/ty/layout.rs
+@@ -2849,7 +2849,7 @@ fn adjust_for_abi(&mut self, cx: &C, abi: SpecAbi) {
+             || abi == SpecAbi::RustIntrinsic
+             || abi == SpecAbi::PlatformIntrinsic
+         {
+-            let fixup = |arg: &mut ArgAbi<'tcx, Ty<'tcx>>| {
++            let fixup = |arg: &mut ArgAbi<'tcx, Ty<'tcx>>, is_ret: bool| {
+                 if arg.is_ignore() {
+                     return;
+                 }
+@@ -2887,9 +2887,9 @@ fn adjust_for_abi(&mut self, cx: &C, abi: SpecAbi) {
+                     _ => return,
+                 }
+ 
+-                // Pass and return structures up to 2 pointers in size by value, matching `ScalarPair`.
+-                // LLVM will usually pass these in 2 registers, which is more efficient than by-ref.
+-                let max_by_val_size = Pointer.size(cx) * 2;
++                // Return structures up to 2 pointers in size by value, matching `ScalarPair`. LLVM
++                // will usually return these in 2 registers, which is more efficient than by-ref.
++                let max_by_val_size = if is_ret { Pointer.size(cx) * 2 } else { Pointer.size(cx) };
+                 let size = arg.layout.size;
+ 
+                 if arg.layout.is_unsized() || size > max_by_val_size {
+@@ -2901,9 +2901,9 @@ fn adjust_for_abi(&mut self, cx: &C, abi: SpecAbi) {
+                     arg.cast_to(Reg { kind: RegKind::Integer, size });
+                 }
+             };
+-            fixup(&mut self.ret);
++            fixup(&mut self.ret, true);
+             for arg in &mut self.args {
+-                fixup(arg);
++                fixup(arg, false);
+             }
+             return;
+         }
+diff --git a/src/test/codegen/arg-return-value-in-reg.rs b/src/test/codegen/return-value-in-reg.rs
+similarity index 74%
+rename from src/test/codegen/arg-return-value-in-reg.rs
+rename to src/test/codegen/return-value-in-reg.rs
+index a69291d47821..4bc0136c5e32 100644
+--- a/src/test/codegen/arg-return-value-in-reg.rs
++++ b/src/test/codegen/return-value-in-reg.rs
+@@ -1,4 +1,4 @@
+-//! Check that types of up to 128 bits are passed and returned by-value instead of via pointer.
++//! This test checks that types of up to 128 bits are returned by-value instead of via out-pointer.
+ 
+ // compile-flags: -C no-prepopulate-passes -O
+ // only-x86_64
+@@ -11,7 +11,7 @@ pub struct S {
+     c: u32,
+ }
+ 
+-// CHECK: define i128 @modify(i128{{( %0)?}})
++// CHECK: define i128 @modify(%S* noalias nocapture dereferenceable(16) %s)
+ #[no_mangle]
+ pub fn modify(s: S) -> S {
+     S { a: s.a + s.a, b: s.b + s.b, c: s.c + s.c }
+diff --git a/src/test/codegen/union-abi.rs b/src/test/codegen/union-abi.rs
+index f282fd237054..afea01e9a2d0 100644
+--- a/src/test/codegen/union-abi.rs
++++ b/src/test/codegen/union-abi.rs
+@@ -63,16 +63,11 @@ pub union UnionU128{a:u128}
+ #[no_mangle]
+ pub fn test_UnionU128(_: UnionU128) -> UnionU128 { loop {} }
+ 
+-pub union UnionU128x2{a:(u128, u128)}
+-// CHECK: define void @test_UnionU128x2(i128 %_1.0, i128 %_1.1)
+-#[no_mangle]
+-pub fn test_UnionU128x2(_: UnionU128x2) { loop {} }
+-
+ #[repr(C)]
+-pub union CUnionU128x2{a:(u128, u128)}
+-// CHECK: define void @test_CUnionU128x2(%CUnionU128x2* {{.*}} %_1)
++pub union CUnionU128{a:u128}
++// CHECK: define void @test_CUnionU128(%CUnionU128* {{.*}} %_1)
+ #[no_mangle]
+-pub fn test_CUnionU128x2(_: CUnionU128x2) { loop {} }
++pub fn test_CUnionU128(_: CUnionU128) { loop {} }
+ 
+ pub union UnionBool { b:bool }
+ // CHECK: define zeroext i1 @test_UnionBool(i8 %b)
+-- 
+2.29.2
+
diff --git a/rust.spec b/rust.spec
index 89c6e76..fbba9fa 100644
--- a/rust.spec
+++ b/rust.spec
@@ -9,10 +9,10 @@
 # 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.
-%global bootstrap_rust 1.48.0
-%global bootstrap_cargo 1.48.0
-%global bootstrap_channel 1.48.0
-%global bootstrap_date 2020-11-19
+%global bootstrap_rust 1.49.0
+%global bootstrap_cargo 1.49.0
+%global bootstrap_channel 1.49.0
+%global bootstrap_date 2020-12-31
 
 # Only the specified arches will use bootstrap binaries.
 #global bootstrap_arches %%{rust_arches}
@@ -21,11 +21,11 @@
 %bcond_with llvm_static
 
 # We can also choose to just use Rust's bundled LLVM, in case the system LLVM
-# is insufficient.  Rust currently requires LLVM 8.0+.
+# is insufficient.  Rust currently requires LLVM 9.0+.
 %bcond_with bundled_llvm
 
-# Requires stable libgit2 1.0
-%if 0%{?fedora} >= 32
+# Requires stable libgit2 1.1
+%if 0%{?fedora} >= 34
 %bcond_with bundled_libgit2
 %else
 %bcond_without bundled_libgit2
@@ -52,8 +52,8 @@
 %endif
 
 Name:           rust
-Version:        1.49.0
-Release:        2%{?dist}
+Version:        1.50.0
+Release:        1%{?dist}
 Summary:        The Rust Programming Language
 License:        (ASL 2.0 or MIT) and (BSD and MIT)
 # ^ written as: (rust itself) and (bundled libraries)
@@ -67,6 +67,10 @@ ExclusiveArch:  %{rust_arches}
 %endif
 Source0:        https://static.rust-lang.org/dist/%{rustc_package}.tar.xz
 
+# This internal rust-abi change broke s390x -- revert for now.
+# https://github.com/rust-lang/rust/issues/80810#issuecomment-781784032
+Patch1:         0001-Revert-Auto-merge-of-79547.patch
+
 ### RHEL-specific patches below ###
 
 # Disable cargo->libgit2->libssh2 on RHEL, as it's not approved for FIPS (rhbz1732949)
@@ -148,7 +152,7 @@ BuildRequires:  pkgconfig(openssl)
 BuildRequires:  pkgconfig(zlib)
 
 %if %without bundled_libgit2
-BuildRequires:  pkgconfig(libgit2) >= 1.0.0
+BuildRequires:  pkgconfig(libgit2) >= 1.1.0
 %endif
 
 %if %{without disabled_libssh2}
@@ -396,6 +400,8 @@ test -f '%{local_rust_root}/bin/rustc'
 
 %setup -q -n %{rustc_package}
 
+%patch1 -p1
+
 %if %with disabled_libssh2
 %patch100 -p1
 %endif
@@ -529,7 +535,8 @@ fi
   --enable-vendor \
   --enable-verbose-tests \
   %{?codegen_units_std} \
-  --release-channel=%{channel}
+  --release-channel=%{channel} \
+  --release-description="%{?fedora:Fedora }%{?rhel:Red Hat }%{version}-%{release}"
 
 %{python} ./x.py build -j "$ncpus" --stage 2
 %{python} ./x.py doc --stage 2
@@ -603,6 +610,9 @@ rm -f %{buildroot}%{_bindir}/rust-lldb
 rm -f %{buildroot}%{rustlibdir}/etc/lldb_*
 %endif
 
+# We don't want Rust copies of LLVM tools (rust-lld, rust-llvm-dwp)
+rm -f %{buildroot}%{rustlibdir}/%{rust_triple}/bin/rust-ll*
+
 
 %check
 export %{rust_env}
@@ -677,6 +687,7 @@ export %{rust_env}
 %license src/tools/cargo/LICENSE-APACHE src/tools/cargo/LICENSE-MIT src/tools/cargo/LICENSE-THIRD-PARTY
 %doc src/tools/cargo/README.md
 %{_bindir}/cargo
+%{_libexecdir}/cargo*
 %{_mandir}/man1/cargo*.1*
 %{_sysconfdir}/bash_completion.d/cargo
 %{_datadir}/zsh/site-functions/_cargo
@@ -720,6 +731,9 @@ export %{rust_env}
 
 
 %changelog
+* Thu Feb 11 2021 Josh Stone <jistone@redhat.com> - 1.50.0-1
+- Update to 1.50.0.
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.49.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index 9a88293..a9788dc 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (rustc-1.49.0-src.tar.xz) = fd8bc67ec0a73d3b6bf9c1fabb7ea981ef817644b4e6ced982fa90b12eae9b55de074634a670bdfb38bfee6588603e818ddcbcc2f2a05f83057c061b4194b4b7
+SHA512 (rustc-1.50.0-src.tar.xz) = df3c83c0fdc9ebce6fdccddda781dea0cdbd88d2b2a8220cac40cc3a8fa957923ae834d1fa45283d4ad227b334bd9e220e37a4a1ad7a1c7aeb806ed9ed387245
diff --git a/sources-bootstrap b/sources-bootstrap
index 21fb440..78e4cd5 100644
--- a/sources-bootstrap
+++ b/sources-bootstrap
@@ -1,8 +1,7 @@
-SHA512 (rustc-1.49.0-src.tar.xz) = fd8bc67ec0a73d3b6bf9c1fabb7ea981ef817644b4e6ced982fa90b12eae9b55de074634a670bdfb38bfee6588603e818ddcbcc2f2a05f83057c061b4194b4b7
-SHA512 (rust-1.48.0-aarch64-unknown-linux-gnu.tar.xz) = 6ebbd936b1bc2ccf30b62dbbbc6f3986fb57738d89e33a23d58bab09be57a445c17df7912866add91cc108ef7547d229a08c6206db2d2fb00d72887ff6a0894d
-SHA512 (rust-1.48.0-armv7-unknown-linux-gnueabihf.tar.xz) = 9763b0c5bc5dc7b265b86636ed32947aab98bd9b5732c4b298ade93e9a09bab82ad37fc7ca2d7c97dfd87634756b3c55015d47696c0a6ed2cb44be03659bcf55
-SHA512 (rust-1.48.0-i686-unknown-linux-gnu.tar.xz) = b8b3c5407304a333fc6c10ad70363589a88673640dda7b5fde8971097e679f56a8c733da31b2183044ae2ce30700db923cc3c3cb8c590d785df680b60b199451
-SHA512 (rust-1.48.0-powerpc64le-unknown-linux-gnu.tar.xz) = 7ddd2b0599872012f8613ccab456622cb05a0a43587b7d389e8b7fdf9381f0387763726d892da931233c89e8e3ce45c2b303ed00b1cce1f91c88d8f88d6b148d
-SHA512 (rust-1.48.0-powerpc64-unknown-linux-gnu.tar.xz) = f79e1f984cc3c4dce08599418be2885666e0b6f73e639b10e97ffff4b900606d880c0596b6c2ab7c5f999cfc364d22b2ca6ab88db6ba38b8b227670b222fe23b
-SHA512 (rust-1.48.0-s390x-unknown-linux-gnu.tar.xz) = b2b1565f3b1cc0c3bf4aa06aba1da7df775c6e29c892ca7727d0e549f175b632080433be2586e799c5636231de6c678f0228dedee8358fbf167016a1f7d25389
-SHA512 (rust-1.48.0-x86_64-unknown-linux-gnu.tar.xz) = 0784e156e70c47386abfa88ecfeb62b1109364459b1fee225de0749c30379c4eb443ff3ff7faa7dc1a6ff373bc6eb43997007f937889cb35daf940a74641753b
+SHA512 (rustc-1.50.0-src.tar.xz) = df3c83c0fdc9ebce6fdccddda781dea0cdbd88d2b2a8220cac40cc3a8fa957923ae834d1fa45283d4ad227b334bd9e220e37a4a1ad7a1c7aeb806ed9ed387245
+SHA512 (rust-1.49.0-aarch64-unknown-linux-gnu.tar.xz) = fa81b618359c2952de941e094eabfe2966e3c1a39a1b20452a77f1a68a54dde9cc5cade18db911cf448ffe947d934461ce752112bd9b5b5430e1fcdabbd8b56a
+SHA512 (rust-1.49.0-armv7-unknown-linux-gnueabihf.tar.xz) = 1cba85fc958371aeb1d521e8842ad576e65d244147e2c75c34eaa776552ed025434d10284fa976d901d6cede69f6db3e5fdd770005ca0b93bb5e3202b9f9392a
+SHA512 (rust-1.49.0-i686-unknown-linux-gnu.tar.xz) = b4d39cb234314f013969b5db3d365d21719d7a01f2dc0816e4f221c5e6d4abecd7f9e83f54b8640173d00d3e701cb3cbb61cef32f00db9356139005a1ce3bd19
+SHA512 (rust-1.49.0-powerpc64le-unknown-linux-gnu.tar.xz) = c17eb27ec4dbcc56da3edffbc57e0edda99744d6a0d38369fa08af066894aeb13dd78c7b8055f2246fc3bf13c654842675ea4df44b7bc8852e0f9952acdf7e7c
+SHA512 (rust-1.49.0-s390x-unknown-linux-gnu.tar.xz) = 25259ea2e499c89459b14571e2c54f230d642af9cfe539dc2b8be15eff0e23b8c6e60af4c567bcbb6c6c185b4537eaab19c3395fce48b1f6e5ef1234efc31e3a
+SHA512 (rust-1.49.0-x86_64-unknown-linux-gnu.tar.xz) = c008aa50e17db6a0134fb85235a958258d345410f5063bc77175f7c28b2e35895427b9e68cd1ac9acb769769c83313cd59fe6465b453e891cf415a2514b7722d