Pin emscripten test to older nightly too

Author: Manishearth

.github/workflows/build-test.yml

@@ -229,11 +229,9 @@ jobs:
       - name: Load nightly Rust toolchain for WASM.
         run: |
           rustup install nightly-2021-02-28
-          rustup install nightly
-          rustup target add wasm32-unknown-unknown --toolchain nightly-2021-02-28-x86_64-unknown-linux-gnu
-          # emscripten test runs on newer nightly
-          rustup target add wasm32-unknown-emscripten --toolchain nightly
-          rustup component add rust-src --toolchain nightly
+          rustup target add wasm32-unknown-unknown --toolchain nightly-2021-02-28
+          rustup target add wasm32-unknown-emscripten --toolchain nightly-2021-02-28
+          rustup component add rust-src --toolchain nightly-2021-02-28
       - name: Install WASM tools
         run: |
           sudo apt-get install wabt binaryen

ffi/cpp/examples/fixeddecimal_wasm/Makefile

@@ -19,7 +19,7 @@ a.out: ../../../../target/debug/libicu_capi.a $(ALL_HEADERS) test.cpp
 	g++ -std=c++17 test.cpp ../../../../target/debug/libicu_capi.a -ldl -lpthread -lm -g
 
 ../../../../target/wasm32-unknown-emscripten/release/libicu_capi.a: $(ALL_RUST)
-	RUSTFLAGS="-Cpanic=abort" cargo +nightly build --release -p icu_capi --target wasm32-unknown-emscripten -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort
+	RUSTFLAGS="-Cpanic=abort" cargo +nightly-2021-02-28 build --release -p icu_capi --target wasm32-unknown-emscripten -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort
 
 web-version.html: ../../../../target/wasm32-unknown-emscripten/release/libicu_capi.a $(ALL_HEADERS) test.cpp
 	emcc -std=c++17 test.cpp ../../../../target/wasm32-unknown-emscripten/release/libicu_capi.a -ldl -lpthread -lm -g  -o web-version.html --bind --emrun -sENVIRONMENT=web -sWASM=1 -sEXPORT_ES6=1 -sMODULARIZE=1