Dispose the module.

Thanks to brson for noticing it.

Author: cixtor

src/comp/middle/trans.rs

@@ -7066,6 +7066,7 @@ fn run_passes(ModuleRef llmod, bool opt, bool verify, str output,
                                      _str.buf(x86.get_target_triple()),
                                      _str.buf(output),
                                      FileType);
+        llvm.LLVMDisposeModule(llmod);
         ret;
     }
 

src/rustllvm/RustWrapper.cpp

@@ -70,5 +70,6 @@ extern "C" void LLVMRustWriteOutputFile(LLVMPassManagerRef PMR, LLVMModuleRef M,
 
   bool foo = Target.addPassesToEmitFile(*PM, FOS, FileType2, OLvl, NoVerify);
   assert(!foo);
+  (void)foo;
   PM->run(*unwrap(M));
 }