Update Print.cpp (#3060)

#2891
2019-08-20 06:36:04 -07:00 · 2019-08-20 06:36:04 -07:00 · 007a93ec7e
commit 007a93ec7e
parent a5f3fc6fad
1 changed files with 1 additions and 1 deletions
--- a/cores/esp32/Print.cpp
+++ b/cores/esp32/Print.cpp
@ -52,7 +52,7 @@ size_t Print::printf(const char *format, ...)
    va_list copy;
    va_start(arg, format);
    va_copy(copy, arg);
-    size_t len = vsnprintf(NULL, 0, format, arg);
+    size_t len = vsnprintf(NULL, 0, format, copy);
    va_end(copy);
    if(len >= sizeof(loc_buf)){
        temp = new char[len+1];