Earle F. Philhower, III ff74813d54 Fix String creation and concat issues (#4955) ...

When a string is concatted to itself, the pointer to its c_str can change
due to realloc().  This would invalidate the passed-in pointer being
concatted, and cause a use-after-free error.  Special case this to avoid
the issue.  Now "a += a;" works properly.

Also use sprintf(%{l}d) instead of non-POSIX ltoa/itoa calls to construct a
string from a signed number (in base 10 only).  The non-posix versions don't
handle INT_MIN properly on either host_tests or on the ESP8266.

2018-07-24 16:20:57 -04:00

..

esp8266

Fix String creation and concat issues (#4955)

2018-07-24 16:20:57 -04:00