cpp: fix ## bug

2 files changed, 1 insertions, 2 deletions

diff --git a/c/lex.c b/c/lex.c
index 548f82c..e2e42d4 100644
--- a/c/lex.c
+++ b/c/lex.c
@@ -1100,7 +1100,7 @@ expandfnmacro(struct lexer *lx, struct span *span, struct macro *mac)
          tk = mac->rlist.tk[i];
          if (tk.t == TKPPCAT) {
             if (i > 0 && i < mac->rlist.n-1) {
-               const struct token *lhs = rlist2.n ? &rlist2.p[rlist2.n-1] : &mac->rlist.tk[i-1],
+               const struct token *lhs = &mac->rlist.tk[i-1],
                                   *rhs = &mac->rlist.tk[i+1];
                struct token new;
                if (lhs->t != TKPPMACARG && rhs->t != TKPPMACARG) {
diff --git a/todo.txt b/todo.txt
index 773a37b..c022967 100644
--- a/todo.txt
+++ b/todo.txt
@@ -3,7 +3,6 @@ Things to finish before moving onto compiler optimizations, C extensions, other
 - self host. not yet compiling:
     - io.c (TODO varargs)
     - c/eval.c, ir/fold.c (NYI flt -> u64 cvt)
-    - c/builtin.c (preprocessor bugs)
     - ir/optmem.c (preprocessor bugs w/ imap macros)
     - embedfilesdir.c (static eval bug)