Fix repl when stdin gets closed

Also, add simple script to see how many of the Lib/ libraries we can import

src/jit.cpp

@@ -179,14 +179,15 @@ int main(int argc, char** argv) {
         while (repl) {
             char* line = readline(">> ");
 
-            AST_Module* m = parse_string(line);
-
             if (!line) {
                 repl = false;
             } else {
                 add_history(line);
 
+                AST_Module* m = parse_string(line);
+
                 Timer _t("repl");
+
                 if (m->body.size() > 0 && m->body[0]->type == AST_TYPE::Expr) {
                     AST_Expr* e = ast_cast<AST_Expr>(m->body[0]);
                     AST_Call* c = new AST_Call();

tools/try_importing_all.py

+import glob
+import os
+import subprocess
+
+modules = []
+for fn in glob.glob("from_cpython/Lib/*.py"):
+    modules.append(os.path.basename(fn)[:-3])
+
+for fn in glob.glob("from_cpython/Lib/*"):
+    if not os.path.isdir(fn):
+        continue
+    modules.append(os.path.basename(fn))
+print modules
+
+nworked = 0
+total = 0
+print len(modules)
+for m in modules:
+    p = subprocess.Popen(["./pyston_dbg"], stdin=subprocess.PIPE)
+    p.stdin.write("import %s\n" % m)
+    p.stdin.close()
+    code = p.wait()
+    if code == 0:
+        print m, "worked",
+        nworked += 1
+    else:
+        print code
+        print m, "failed",
+    total += 1
+    print "%d/%d" % (nworked, total)