diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5851fdf507..8f8a9d0246 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Install LLVM
-        run: sudo ./ci/install-llvm.sh 8
+        run: sudo ./ci/install-llvm.sh 10
 
       - name: Enable LLD
         run: sudo ./ci/enable-lld.sh
diff --git a/Cargo.lock b/Cargo.lock
index 218757d115..e0c25435e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -345,7 +345,7 @@ dependencies = [
 [[package]]
 name = "inkwell"
 version = "0.1.0"
-source = "git+https://github.com/rtfeldman/inkwell?tag=llvm8-0.release2#afdfd85c1183869e5d17b930c798c3087ff1c737"
+source = "git+https://github.com/rtfeldman/inkwell?tag=llvm10-0.release1#005de45445d6ddae80f09ed012e6c3dfe674201a"
 dependencies = [
  "either",
  "inkwell_internals",
@@ -359,7 +359,7 @@ dependencies = [
 [[package]]
 name = "inkwell_internals"
 version = "0.1.0"
-source = "git+https://github.com/rtfeldman/inkwell?tag=llvm8-0.release2#afdfd85c1183869e5d17b930c798c3087ff1c737"
+source = "git+https://github.com/rtfeldman/inkwell?tag=llvm10-0.release1#005de45445d6ddae80f09ed012e6c3dfe674201a"
 dependencies = [
  "proc-macro2 0.4.30",
  "quote 0.6.13",
@@ -410,9 +410,9 @@ checksum = "dea0c0405123bba743ee3f91f49b1c7cfb684eef0da0a50110f758ccf24cdff0"
 
 [[package]]
 name = "llvm-sys"
-version = "80.1.2"
+version = "100.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf2969773884a5701f0c255e2a14d48d4522a66db898ec1088cb21879a228377"
+checksum = "df29b4f2f4e8a5f7871ccad859aa17a171ba251da96bfd55224d53f48a96d2a2"
 dependencies = [
  "cc",
  "lazy_static",
diff --git a/ci/install-llvm.sh b/ci/install-llvm.sh
index b9f076a8ae..0c327914ee 100755
--- a/ci/install-llvm.sh
+++ b/ci/install-llvm.sh
@@ -11,7 +11,7 @@
 set -eux
 
 # read optional command line argument
-LLVM_VERSION=9
+LLVM_VERSION=10
 if [ "$#" -eq 1 ]; then
     LLVM_VERSION=$1
 fi
@@ -26,9 +26,9 @@ if [[ $EUID -ne 0 ]]; then
 fi
 
 declare -A LLVM_VERSION_PATTERNS
-LLVM_VERSION_PATTERNS[8]="-8"
 LLVM_VERSION_PATTERNS[9]="-9"
-LLVM_VERSION_PATTERNS[10]=""
+LLVM_VERSION_PATTERNS[10]="-10"
+LLVM_VERSION_PATTERNS[11]=""
 
 if [ ! ${LLVM_VERSION_PATTERNS[$LLVM_VERSION]+_} ]; then
     echo "This script does not support LLVM version $LLVM_VERSION"
@@ -47,6 +47,8 @@ case "$DIST_VERSION" in
     Ubuntu_18.04 )    REPO_NAME="deb http://apt.llvm.org/bionic/   llvm-toolchain-bionic$LLVM_VERSION_STRING  main" ;;
     Ubuntu_18.10 )    REPO_NAME="deb http://apt.llvm.org/cosmic/   llvm-toolchain-cosmic$LLVM_VERSION_STRING  main" ;;
     Ubuntu_19.04 )    REPO_NAME="deb http://apt.llvm.org/disco/    llvm-toolchain-disco$LLVM_VERSION_STRING   main" ;;
+    Ubuntu_19.10 )   REPO_NAME="deb http://apt.llvm.org/eoan/      llvm-toolchain-eoan$LLVM_VERSION_STRING    main" ;;
+    Ubuntu_20.04 )   REPO_NAME="deb http://apt.llvm.org/focal/     llvm-toolchain-focal$LLVM_VERSION_STRING    main" ;;
     * )
         echo "Distribution '$DISTRO' in version '$VERSION' is not supported by this script (${DIST_VERSION})."
         exit 2
@@ -57,4 +59,4 @@ esac
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
 add-apt-repository "${REPO_NAME}"
 apt-get update
-apt-get install -y clang-$LLVM_VERSION lld-$LLVM_VERSION
+apt-get install -y clang-$LLVM_VERSION lldb-$LLVM_VERSION lld-$LLVM_VERSION clangd-$LLVM_VERSION
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 3d6d7f787e..7a4e0b8912 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -54,5 +54,5 @@ inlinable_string = "0.1.0"
 # commit of TheDan64/inkwell, push a new tag which points to the latest commit,
 # change the tag value in this Cargo.toml to point to that tag, and `cargo update`.
 # This way, GitHub Actions works and nobody's builds get broken.
-inkwell = { git = "https://github.com/rtfeldman/inkwell", tag = "llvm8-0.release2" }
+inkwell = { git = "https://github.com/rtfeldman/inkwell", tag = "llvm10-0.release1" }
 target-lexicon = "0.10"
diff --git a/compiler/gen/Cargo.toml b/compiler/gen/Cargo.toml
index 8d4f1ce41d..0b74a834a2 100644
--- a/compiler/gen/Cargo.toml
+++ b/compiler/gen/Cargo.toml
@@ -37,7 +37,7 @@ inlinable_string = "0.1.0"
 # commit of TheDan64/inkwell, push a new tag which points to the latest commit,
 # change the tag value in this Cargo.toml to point to that tag, and `cargo update`.
 # This way, GitHub Actions works and nobody's builds get broken.
-inkwell = { git = "https://github.com/rtfeldman/inkwell", tag = "llvm8-0.release2" }
+inkwell = { git = "https://github.com/rtfeldman/inkwell", tag = "llvm10-0.release1" }
 target-lexicon = "0.10"
 
 [dev-dependencies]
diff --git a/compiler/gen/src/llvm/build.rs b/compiler/gen/src/llvm/build.rs
index be435c503a..7694951747 100644
--- a/compiler/gen/src/llvm/build.rs
+++ b/compiler/gen/src/llvm/build.rs
@@ -1227,11 +1227,7 @@ fn clone_list<'a, 'ctx, 'env>(
         // one we just malloc'd.
         //
         // TODO how do we decide when to do the small memcpy vs the normal one?
-        builder
-            .build_memcpy(clone_ptr, ptr_bytes, elems_ptr, ptr_bytes, size)
-            .unwrap_or_else(|err| {
-                panic!("Error while attempting LLVM memcpy: {:?}", err);
-            });
+        builder.build_memcpy(clone_ptr, ptr_bytes, elems_ptr, ptr_bytes, size);
     } else {
         panic!("TODO Cranelift currently only knows how to clone list elements that are Copy.");
     }