Fix(fmt): incorrect, uninitialized variable used

1 files changed, 3 insertions, 2 deletions

diff --git a/src/base/fmt/do.c b/src/base/fmt/do.c
index 3825fc8..a990ab0 100644
--- a/src/base/fmt/do.c
+++ b/src/base/fmt/do.c
@@ -663,9 +663,10 @@ int
 fmt·do(fmt·State *io, char *fmt)
 {
     rune r;
-    int  c, n;
+    int  c, n, o;
     char *b, *e;
 
+    o = io->n;
     for(;;){
         b = io->buffer.cur;
         e = io->buffer.end;
@@ -692,7 +693,7 @@ fmt·do(fmt·State *io, char *fmt)
         io->n += b - io->buffer.cur;
         io->buffer.cur = b;
         if(!c) /* we hit our nul terminator */
-            return io->n - n;
+            return io->n - o;
         io->buffer.end = e;
 
         if(!(fmt=dispatch(io, fmt)))