shithub: femtolisp

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Fix "use-after-relocate" in stream_to_string

cvalue_string() can cause a gc - this potentially makes the ios_t-pointer that is cached in the local variable "st" invalid.

--- a/iostream.c

+++ b/iostream.c

@@ -389,7 +389,7 @@

         n = st->size;

         str = cvalue_string(n);

         memcpy(cvalue_data(str), value2c(ios_t*,*ps)->buf, n);

-        ios_trunc(st, 0);

+        ios_trunc(value2c(ios_t*,*ps), 0);

     }

     else {

         char *b = ios_takebuf(st, &n); n--;