Update Python to 3.11.0b4 in emscripten test (#2507)

* Update Python to 3.11.0b4 in emscripten test

* Print traceback when import exception failed

* Try `ALLOW_MEMORY_GROWTH=1`

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
       - run: pip install nox
       - uses: actions-rs/toolchain@v1
         with:
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
       - run: pip install nox
       - uses: actions-rs/toolchain@v1
         with:
@@ -152,7 +152,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
           architecture: ${{ matrix.platform.python-architecture }}
@@ -324,7 +324,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - uses: Swatinem/rust-cache@v1
@@ -351,7 +351,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v4
         id: setup-python
         with:
           python-version: 3.11-dev

emscripten/Makefile

@@ -3,7 +3,7 @@ CURDIR=$(abspath .)
 # These three are passed in from nox.
 BUILDROOT ?= $(CURDIR)/builddir
 PYMAJORMINORMICRO ?= 3.11.0
-PYPRERELEASE ?= b1 # I'm not sure how to split 3.11.0b1 in Make.
+PYPRERELEASE ?= b4 # I'm not sure how to split 3.11.0b4 in Make.
 
 EMSCRIPTEN_VERSION=3.1.13
 

noxfile.py

@@ -187,6 +187,7 @@ def test_emscripten(session: nox.Session):
             f"-C link-arg=-lpython{info.pymajorminor}",
             "-C link-arg=-lexpat",
             "-C link-arg=-lmpdec",
+            "-C link-arg=-sALLOW_MEMORY_GROWTH=1",
         ]
     )
     session.env["CARGO_BUILD_TARGET"] = target

src/exceptions.rs

@@ -108,7 +108,13 @@ macro_rules! import_exception {
                     .get_or_init(py, || {
                         let imp = py
                             .import(stringify!($module))
-                            .expect(concat!("Can not import module: ", stringify!($module)));
+                            .unwrap_or_else(|err| {
+                                let traceback = err
+                                    .traceback(py)
+                                    .map(|tb| tb.format().expect("raised exception will have a traceback"))
+                                    .unwrap_or_default();
+                                ::std::panic!("Can not import module {}: {}\n{}", stringify!($module), err, traceback);
+                            });
                         let cls = imp.getattr(stringify!($name)).expect(concat!(
                             "Can not load exception class: {}.{}",
                             stringify!($module),