Function catch

src/lib/libemval.js:518–529

(e)

      // with metadata optimised out otherwise.
      ___cxa_rethrow();
    } catch (e) {
#if !DISABLE_EXCEPTION_THROWING || WASM_EXCEPTIONS
      // ___cxa_rethrow incremented uncaughtExceptionCount.
      // Since we caught it in JS, we need to manually decrement it to balance.
      decrementUncaughtExceptionCount();
#endif
      var handle = Emval.toHandle(e);
#if !DISABLE_EXCEPTION_CATCHING || WASM_EXCEPTIONS
      emval_exception_decrefs[handle] = decrementExceptionRefcount;
#endif
      return handle;
    }
  },
};