Fix wasm Failure

Author: Thirumalai-Shaktivel

src/bin/lpython.cpp

@@ -1122,9 +1122,17 @@ namespace wasm {
                         compiler_options.use_colors = true; \
                         compiler_options.indent = true; \
                         Allocator al(4*1024); \
-                        LFortran::LocationManager lm; \
                         LFortran::diag::Diagnostics diagnostics; \
-                        lm.in_filename.push_back("input");
+                        LFortran::LocationManager lm; \
+                        { \
+                            LFortran::LocationManager::FileLocations fl; \
+                            fl.in_filename = "input.txt"; \
+                            std::ofstream out("input.txt"); \
+                            out << input; \
+                            lm.files.push_back(fl); \
+                            lm.init_simple(std::string(input)); \
+                            lm.file_ends.push_back(strlen(input)); \
+                        }