[STUPIDCONTEM]

Evidence review (2026-10-09)

Closed by maintainer; not ready to reopen. Required evidence: Title ID and a log showing a title reaches the Linux asprintf encoding-error path and needs guest EILSEQ.

Game/title ID: none verified. No PS5 title execution is claimed.

What

Translate host EILSEQ to guest FreeBSD EILSEQ when asprintf_nid_postfix fails to format an invalid wide character. On Linux, host vasprintf returns errno 84, but the guest ABI uses 86. The change handles only this failed conversion; successful formatting and other errors retain their existing behavior.

The error is specified for the printf family by FreeBSD vfprintf(3), and stable/11 errno.h defines EILSEQ as 86. Open #1804 changes the separate vasprintf wrapper's wide-format routing in Formatting.cpp; it does not change asprintf_nid_postfix in AllocatingStrings.cpp.

Tested

• Direct Linux baseline-versus-fixed verification passed in run 37902555693, head 0a51258. With the unchanged upstream implementation, the regression reports expected guest errno 86 but got 84. Restoring the candidate makes all three focused runs pass.
• The regression uses an invalid surrogate in the C locale, checks negative return/null output/guest errno, then verifies successful formatted allocation, content, matching release and null-destination EINVAL. It explicitly registers the standalone test's default allocator.
• Rebased onto main 6cc0503; the production file and test are identical to the Linux-verified version. Windows 10 Pro 19045 / WinLibs GCC 15.2 UCRT, Release: with the separate current-main build repair fix(build): declare SPIRV headers for Vulkan helper tests #2093, default/libs builds and full CTest passed 494/494 in 26.67 seconds (combined head 9bfd3067).

The changed host-formatting path and new regression are excluded on Windows. Windows runs validate existing behavior and build compatibility; they do not establish this Linux error correction. No title run was performed.

Checklist

• Based on current main; no other open PR implements this asprintf error correction (historical base; current readiness not asserted)
• One topic per PR
• No code comments added
• No silent stubs added
• No notes, reports or images added to the repository
• No third-party code added
• Generic behavior, not title-specific
• Build dependency: the equivalent repair merged as fix(tests): add SPIRV-Headers to the tests that include VulkanTestDevice.hpp #2099; fix(build): declare SPIRV headers for Vulkan helper tests #2093 is closed as superseded.
• AI-assisted: yes; independently reviewed and tested

[oneandonlydean]

Closing: this fixes one errno value on one Linux-only path, and no title is shown reaching it. If a title checks for EILSEQ from asprintf, please reopen with its ID and the log line.