Fresh ubuntu 20.04, default varnish-6.2.1 build error

[laurentdebricon]

Building error:

accept-language.c: In function ‘is_supported’:
accept-language.c:66:5: warning: ‘strncpy’ output truncated before terminating nul copying 1 byte from a string of the same length [-Wstringop-truncation]
   66 |     strncpy(match_str, ":", 1);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~
accept-language.c: In function ‘main’:
accept-language.c:186:9: warning: ‘strncpy’ output truncated before terminating nul copying 2 bytes from a string of the same length [-Wstringop-truncation]
  186 |         strncpy(lang, "??", 2);

Looking for a solution. I have been using this repo for many years ...
default ubuntu 20.04 gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0

[laurentdebricon]

Replacing strncpy by memcpy makes the build ok,
but then testing my script

varnishd -C -f /etc/varnish/myscript_that_include_accept_language.vcl -p vcc_allow_inline_c=on

Message from C-compiler:
vgc.c: In function ‘vcl_rewrite_accept_language’:
vgc.c:2544:25: error: passing argument 1 of ‘VRT_GetHdr’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 2544 |     in_hdr = VRT_GetHdr(sp, HDR_REQ, "\020Accept-Language:");
      |                         ^~
      |                         |
      |                         const struct sess *
vgc.c:413:40: note: expected ‘const struct vrt_ctx *’ but argument is of type ‘const struct sess *’
  413 | #define VRT_CTX  const struct vrt_ctx *ctx
      |                  ~~~~~~~~~~~~~~~~~~~~~~^~~
vgc.c:579:23: note: in expansion of macro ‘VRT_CTX’
[32 lines truncated]
Running C-compiler failed, exited with 1