diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 840c09409bb..2b4a5db5433 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -101,7 +101,7 @@ jobs:
 
     - name: Run y.sh cargo build
       run: |
-        ./y.sh cargo build --manifest-path tests/hello-world/Cargo.toml
+        CARGO_PROFILE_DEV_LTO=no ./y.sh cargo build --manifest-path tests/hello-world/Cargo.toml
 
     - name: Clean
       run: |
diff --git a/.github/workflows/m68k.yml b/.github/workflows/m68k.yml
index 11bc88e67d2..8882830f669 100644
--- a/.github/workflows/m68k.yml
+++ b/.github/workflows/m68k.yml
@@ -83,7 +83,7 @@ jobs:
       run: |
         ./y.sh prepare --only-libcore --cross
         ./y.sh build --sysroot --target-triple m68k-unknown-linux-gnu --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
-        CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ./y.sh cargo build -Zjson-target-spec --manifest-path=./tests/hello-world/Cargo.toml --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
+        CARGO_PROFILE_DEV_LTO=no CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ./y.sh cargo build -Zjson-target-spec --manifest-path=./tests/hello-world/Cargo.toml --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
         ./y.sh clean all
 
     - name: Build
@@ -110,7 +110,7 @@ jobs:
 
         vm_dir=$(pwd)/vm
         cd tests/hello-world
-        CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ../../y.sh cargo build --target m68k-unknown-linux-gnu
+        CARGO_PROFILE_DEV_LTO=no CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ../../y.sh cargo build --target m68k-unknown-linux-gnu
         sudo cp target/m68k-unknown-linux-gnu/debug/hello_world $vm_dir/home/
         sudo chroot $vm_dir qemu-m68k-static /home/hello_world > hello_world_stdout
         expected_output="40"
diff --git a/patches/0030-Add-missing-feature-gate.patch b/patches/0030-Add-missing-feature-gate.patch
new file mode 100644
index 00000000000..a27ed4ea816
--- /dev/null
+++ b/patches/0030-Add-missing-feature-gate.patch
@@ -0,0 +1,37 @@
+From baa9c656ba61633f2e5785fc47bc8f88ed2f738e Mon Sep 17 00:00:00 2001
+From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
+Date: Wed, 11 Mar 2026 12:34:47 +0000
+Subject: [PATCH] Add missing feature gate
+
+---
+ coretests/benches/lib.rs | 1 +
+ coretests/tests/lib.rs   | 1 +
+ 2 file changed, 2 insertion(+)
+
+diff --git a/library/coretests/benches/lib.rs b/library/coretests/benches/lib.rs
+index 150b9b3..281aa75 100644
+--- a/library/coretests/benches/lib.rs
++++ b/library/coretests/benches/lib.rs
+@@ -8,6 +8,7 @@
+ #![feature(iter_array_chunks)]
+ #![feature(iter_next_chunk)]
+ #![feature(iter_advance_by)]
++#![feature(num_internals)]
+ #![feature(uint_gather_scatter_bits)]
+ 
+ extern crate test;
+diff --git a/library/coretests/tests/lib.rs b/library/coretests/tests/lib.rs
+index ecdb687..ab2cf77 100644
+--- a/library/coretests/tests/lib.rs
++++ b/library/coretests/tests/lib.rs
+@@ -88,6 +88,7 @@
+ #![feature(non_exhaustive_omitted_patterns_lint)]
+ #![feature(nonzero_from_str_radix)]
+ #![feature(numfmt)]
++#![feature(num_internals)]
+ #![feature(one_sided_range)]
+ #![feature(panic_internals)]
+ #![feature(pattern)]
+-- 
+2.43.0
+
diff --git a/src/lib.rs b/src/lib.rs
index 592eb68ce27..a7e0972ccf4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -547,8 +547,9 @@ fn target_config(sess: &Session, target_info: &LockedTargetInfo) -> TargetConfig
         },
     );
 
-    let has_reliable_f16 = target_info.supports_target_dependent_type(CType::Float16);
-    let has_reliable_f128 = target_info.supports_target_dependent_type(CType::Float128);
+    // FIXME re-enable once the necessary intrinsics are implemented
+    let has_reliable_f16 = false; //target_info.supports_target_dependent_type(CType::Float16);
+    let has_reliable_f128 = false; //target_info.supports_target_dependent_type(CType::Float128);
 
     TargetConfig {
         target_features,
diff --git a/tests/failing-lto-tests.txt b/tests/failing-lto-tests.txt
index c45fc077658..4c62c35a512 100644
--- a/tests/failing-lto-tests.txt
+++ b/tests/failing-lto-tests.txt
@@ -1,4 +1,3 @@
-tests/ui/lto/all-crates.rs
 tests/ui/lto/debuginfo-lto-alloc.rs
 tests/ui/panic-runtime/lto-unwind.rs
 tests/ui/uninhabited/uninhabited-transparent-return-abi.rs
diff --git a/tests/failing-ui-tests.txt b/tests/failing-ui-tests.txt
index 8589929d2fb..5739b2cbd5d 100644
--- a/tests/failing-ui-tests.txt
+++ b/tests/failing-ui-tests.txt
@@ -99,3 +99,7 @@ tests/ui/eii/privacy1.rs
 tests/ui/eii/default/call_impl.rs
 tests/ui/c-variadic/copy.rs
 tests/ui/asm/x86_64/global_asm_escape.rs
+tests/ui/lto/all-crates.rs
+tests/ui/consts/const-eval/c-variadic.rs
+tests/ui/eii/default/call_default_panics.rs
+tests/ui/explicit-tail-calls/indirect.rs