Commit d6be30e3252 for php.net

commit d6be30e3252fa6a52ed03f666745ace7b4c717ac
Author: Tim Düsterhus <tim@bastelstu.be>
Date:   Mon Jul 6 22:46:38 2026 +0200

    iconv: Fix memory management in autoconf test for `//IGNORE` (#22620)

    Sometimes running `./configure` for ASAN hangs on my machine. This is
    reproducible when compiling and running the program manually using

        clang-16 -g -fsanitize=undefined,address test.c

    It seems this is related to the LLVM symbolizer getting stuck, and the
    symbolizer is likely required to report the memory leak. After adding the
    memory management functions it seems to work (or rather fail) reliably.

diff --git a/ext/iconv/config.m4 b/ext/iconv/config.m4
index e86f3535a97..bea97b27f4f 100644
--- a/ext/iconv/config.m4
+++ b/ext/iconv/config.m4
@@ -112,6 +112,8 @@ int main(void) {
   char *out = malloc(out_left);
   char *out_p = out;
   size_t result = iconv(cd, (char **) &in_p, &in_left, (char **) &out_p, &out_left);
+  free(out);
+  iconv_close(cd);
   if(result == (size_t)-1) {
     return 1;
   }