Parsing fixes (#990)

* properly catch a bunch of possible parse errors, found by afl-fuzz

* clean up wasm-interpreter, use WASM_UNREACHABLE instead of abort

* detect duplicate names in function names section

* detect duplicate export names

1 files changed, 2 insertions, 0 deletions

diff --git a/src/tools/wasm-opt.cpp b/src/tools/wasm-opt.cpp
index a663b1a04..bf79cb31d 100644
--- a/src/tools/wasm-opt.cpp
+++ b/src/tools/wasm-opt.cpp
@@ -90,6 +90,8 @@ int main(int argc, const char* argv[]) {
     } catch (ParseException& p) {
       p.dump(std::cerr);
       Fatal() << "error in parsing input";
+    } catch (std::bad_alloc& b) {
+      Fatal() << "error in building module, std::bad_alloc (possibly invalid request for silly amounts of memory)";
     }
   }