Unpin v8 version (#17521)

This reverts commit 54d1aa0.
Now https://bugs.chromium.org/p/v8/issues/detail?id=12983 seems to be
fixed, so we can unpin this.

This also disables a few stack switching tests because of recent V8 API
changes, which we will address separately. See #17532.

Fixes #17278.

Author: aheejin

.circleci/config.yml

@@ -17,8 +17,6 @@ executors:
       EMTEST_WASI_SYSROOT: "~/wasi-sdk/wasi-sysroot"
       EMTEST_BUILD_VERBOSE: "2"
       EMTEST_DETECT_TEMPFILE_LEAKS: "1"
-      # Currently pinned to 10.5.35 due to https://github.com/emscripten-core/emscripten/issues/17278
-      V8_VERSION: "10.5.35"
   mac:
     environment:
       EMSDK_NOTTY: "1"
@@ -84,7 +82,7 @@ commands:
             # as a "bleeding edge" shell here, basically, with node being the
             # primary shell (which we run without any special flags)
             # Refer to commit 0bc3640 if we need to pin V8 version.
-            echo "V8_ENGINE = [os.path.expanduser('~/.jsvu/v8-${V8_VERSION}'), '--wasm-staging']" >> .emscripten
+            echo "V8_ENGINE = [os.path.expanduser('~/.jsvu/v8'), '--wasm-staging']" >> .emscripten
             echo "JS_ENGINES = [NODE_JS]" >> .emscripten
             echo "if os.path.exists(V8_ENGINE[0]): JS_ENGINES.append(V8_ENGINE)" >> .emscripten
             echo "WASM_ENGINES = []" >> .emscripten
@@ -346,8 +344,7 @@ jobs:
             export PATH="`pwd`/node-v12.13.0-linux-x64/bin:${PATH}"
             npm install jsvu -g
             export PATH="${HOME}/.jsvu:${PATH}"
-            jsvu --os=default --engines=v8 v8@${V8_VERSION}
-
+            jsvu --os=default --engines=v8
       - build
       - build-libs-and-freeze
       - persist

test/test_core.py

@@ -7963,6 +7963,8 @@ def test_vswprintf_utf8(self):
   @no_wasm64('TODO: asyncify for wasm64')
   @with_asyncify_and_stack_switching
   def test_async_hello(self):
+    if self.get_setting('ASYNCIFY') == 2:
+      self.skipTest('https://github.com/emscripten-core/emscripten/issues/17532')
     # needs to flush stdio streams
     self.set_setting('EXIT_RUNTIME')
 

test/test_other.py

@@ -12234,6 +12234,7 @@ def test_multiple_g_flags(self):
     self.assertNotIn(b'.debug', read_binary('hello_world.o'))
 
   @requires_v8
+  @disabled('https://github.com/emscripten-core/emscripten/issues/17532')
   def test_stack_switching_size(self):
     # use iostream code here to purposefully get a fairly large wasm file, so
     # that our size comparisons later are meaningful