Proper error handling in add* and get* methods (#1570)

See #1479 (comment)

Also a one-line readme update, remove an obsolete compiler (mir2wasm) and add a new one (asterius).

Also improve warning and error reporting in binaryen.js - show a stack trace when relevant (instead of node.js process.exit), and avoid atexit warning spam in debug builds.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/js/binaryen.js-post.js b/src/js/binaryen.js-post.js
index 6e4833986..b61b8c3e2 100644
--- a/src/js/binaryen.js-post.js
+++ b/src/js/binaryen.js-post.js
@@ -1609,3 +1609,12 @@ Module['setDebugInfo'] = function(on) {
 Module['setAPITracing'] = function(on) {
   return Module['_BinaryenSetAPITracing'](on);
 };
+
+// Additional customizations
+
+Module['exit'] = function(status) {
+  // Instead of exiting silently on errors, always show an error with
+  // a stack trace, for debuggability.
+  if (status != 0) throw new Error('exiting due to error: ' + status);
+};
+