[wasm] Implement {Compile,Runtime}Error; fix traps from start function

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index a0d24f0e5e62c833abbcbfebe895a520dd5fbe1d..785d09c85b018521835cef932089c211207b89b6 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -107,7 +107,10 @@ enum ContextLookupFlags {
   V(SET_HAS_METHOD_INDEX, JSFunction, set_has)                            \
   V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function)       \
   V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function)           \
-  V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function)
+  V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function)             \
+  V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction,                        \
+    wasm_compile_error_function)                                          \
+  V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction, wasm_runtime_error_function)
 
 #define NATIVE_CONTEXT_FIELDS(V)                                               \
   V(GLOBAL_PROXY_INDEX, JSObject, global_proxy_object)                         \