diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index d9fa449d3ecd..b3cd1f2dfc33 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -87,7 +87,7 @@ jobs:
     steps:
       - template: ci/azure-install-rust.yml
         parameters:
-          toolchain: nightly-2021-01-23
+          toolchain: nightly-2021-03-11
       - template: ci/azure-install-node.yml
       - script: cargo test --target wasm32-unknown-unknown --features nightly --test wasm
 
@@ -204,7 +204,7 @@ jobs:
     steps:
       - template: ci/azure-install-rust.yml
         parameters:
-          toolchain: nightly-2020-08-27
+          toolchain: nightly-2021-03-11
       - script: rustup component add rust-src
         displayName: "install rust-src"
       - script: |
diff --git a/crates/threads-xform/src/lib.rs b/crates/threads-xform/src/lib.rs
index 2767c9ba9b67..5bed00333679 100644
--- a/crates/threads-xform/src/lib.rs
+++ b/crates/threads-xform/src/lib.rs
@@ -113,7 +113,6 @@ impl Config {
         mem.maximum = Some(cmp::max(self.maximum_memory / PAGE_SIZE, prev_max));
         assert!(mem.data_segments.is_empty());
 
-        delete_synthetic_func(module, "__wasm_init_memory")?;
         let tls = Tls {
             init: delete_synthetic_func(module, "__wasm_init_tls")?,
             size: delete_synthetic_global(module, "__tls_size")?,
diff --git a/examples/raytrace-parallel/build.sh b/examples/raytrace-parallel/build.sh
index a283b8fa2185..82fbb659bbde 100755
--- a/examples/raytrace-parallel/build.sh
+++ b/examples/raytrace-parallel/build.sh
@@ -12,7 +12,7 @@ set -ex
 #   features enabled, ensuring that LLVM will generate atomic instructions,
 #   shared memory, passive segments, etc.
 
-RUSTFLAGS='-C target-feature=+atomics,+bulk-memory' \
+RUSTFLAGS='-C target-feature=+atomics,+bulk-memory,+mutable-globals' \
   cargo build --target wasm32-unknown-unknown --release -Z build-std=std,panic_abort
 
 # Note the usage of `--target no-modules` here which is required for passing