vendor:zlib SIGSEGV, Segmentation fault - String passing issue? #5649
Description
Context
Odin: dev-2025-08:2f0b018db
OS: EndeavourOS, Linux 6.15.3-arch1-1
CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz
RAM: 15841 MiB
Backend: LLVM 20.1.6
Expected Behavior
The code below should not produce a SIGSEGV, Segmentation fault
Current Behavior
It produces a SIGSEGV, Segmentation fault
Failure Information (for bugs)
It seems like the passed string VERSION from the zlib_vendor::inflateInit function through the private foreign zlib_vendor::inflateInit2_ function cannot be accessed from the zlib implementation.
Error:
0x00007ffff7f8607a in inflateInit2_ (strm=0x7fffffffe108, windowBits=15, version=0xffffffff <error: Cannot access memory at address 0xffffffff>, stream_size=4244136) at /usr/src/debug/zlib/zlib-1.3.1/inflate.c:183
Stacktrace:
#0 0x00007ffff7f8607a in inflateInit2_ (strm=0x7fffffffe108, windowBits=15, version=0xffffffff <error: Cannot access memory at address 0xffffffff>, stream_size=4218884) at /usr/src/debug/zlib/zlib-1.3.1/inflate.c:183
#1 0x00000000004011d1 in vendor_zlib::inflateInit (strm=0x7fffffffe108, level=-1) at /home/andreasr/Odin/vendor/zlib/zlib.odin:239
#2 0x0000000000405bd4 in main::main () at main.odin:8
#3 0x0000000000402295 in main (argc=1, argv=0x7fffffffe3c8) at /home/andreasr/Odin/base/runtime/entry_unix.odin:57
Steps to Reproduce
package main
import "vendor:zlib"
main :: proc(){
stream:zlib.z_stream
zlib.inflateInit(&stream,-1)
return
}