New 'make.tcl vfslibs' step (also run inside 'make.tcl project' before kit vfs
assembly): propagates declared vendored platform-library packages into kit vfs
lib_tcl<N> trees, ending the hand-copying that let kits ship a known-buggy
tcludp through three make invocations (the G-036/G-037 motivating case).
- declaration: src/runtime/vendorlib_vfs.toml, parsed with bootsupport tomlish
(no ad-hoc parsing; G-024's mapvfs toml conversion NOT required first - this
file is recorded as a candidate for absorption into it). [install.<name>]
entries: source (relative to src/), targets (kit vfs lib folders relative to
src/vfs/), optional supersedes (folder names removed from each target before
install - explicit, no silent mixed-version provision per G-035 concerns).
- participation is per-package per-kit; authority is the declaration - nothing
syncs undeclared, so the known vendorlib/kit twapi drift is deliberately
untouched (resolves the direction/authority design question).
- punkcheck provenance at src/vfs/.punkcheck (gitignored, outside kit
payloads); skip-if-unchanged proven (rerun: 0 copied, 9 skipped per target);
malformed/unresolvable entries fail the build naming the entry (exit 3).
- 8.6 kits upgraded (the G-036 loose-end decision, recorded): tcludp 1.0.13 is
dual-generation (pkgIndex selects tcl9udp1013.dll on 9+, udp1013t.dll on
8.5+) so the single vendorlib_tcl9 source serves punk8win.vfs/lib_tcl8;
superseded udp1.0.12 removed.
- verified on rebuilt kits: punksys/punkbi (8.6.13) and punk902z (9.0.2) all
report package require udp == 1.0.13 loading the generation-appropriate dll
from their vfs; no udp1.0.12 remains under src/vfs; punksys piped-shell exit
smoke clean.
- G-037 flipped proposed -> achieved 2026-07-08 under user direction (no
intermediate active stop).
- includes project-build byproducts via established channels: bootsupport
snapshots refreshed to punk-0.2.1 / punk::lib-0.3.0 (from today's version
bumps) and make.tcl synced into layout copies.
- project 0.4.8 (CHANGELOG entry)
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Completes G-036's remaining acceptance item - version-based detection of the
vulnerable combination (tcludp < 1.0.13 on Tcl 9 Windows: the per-thread exit
handler closes the process-global sockListLock/waitForSock events, silently
freezing every other udp-using thread's event loop after any udp-loaded thread
exits; root-caused and fixed-by-upgrade in 0.4.3).
- punk::lib 0.3.0: has_libbug_udp_threadexit gathers live facts (loaded udp
version, else best available registered version discovered without loading
the binary via an unsatisfiable package require triggering the index scan)
and delegates the verdict to the pure classifier
libbug_udp_threadexit_applies (facts in, verdict out - testable). has_libbug_*
is the new check family for bundled/vendored library bugs; buginfo dicts may
carry a full 'url' reference key for non tcl-core trackers.
- punk 0.2.1: 'help tcl' scans has_libbug_* alongside has_tclbug_*, renders the
url key when present, and no longer errors on a triggered check carrying a
reference without a description (latent unset-indent fix).
- new checkbugs.test: classifier combination matrix, live-check dict shape and
classifier consistency, and a buginfo-contract test across all existing
check procs.
- verified: current kit (udp 1.0.13) reports bug=0 with no warning; a simulated
triggered has_libbug_* check renders description + url in the help tcl
warning block. Suites: punk/lib 21 pass, punk/ns 26 pass.
- G-036 flipped to achieved 2026-07-08 (index acceptance REMAINING annotated
DONE; detail file gains the Detection section). Open non-gating decisions
recorded in the detail file: punk8win (8.6) kit udp 1.0.12 swap; optional
upstream tickets for residual tcludp trunk weaknesses.
- project 0.4.7 (CHANGELOG entry)
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
- G-039 (proposed): investigate/reproduce the orphaned-shell one-core spin
observed 2026-07-08 (single hard-looping thread after the hosting terminal
went away); detail file records the observation, repro/diagnosis approach
(reusing the G-036 dump tooling pipeline) and the G-038 coordination point
(dead console = failure branch of the console-EOF restart decision).
- G-036 acceptance reworked per user: standalone minimal repro waived as
moot (root cause proven and fixed upstream); remaining actionable is a
has_bug-style check reporting tcludp < 1.0.13 on Tcl 9 Windows through the
existing check/help machinery (simple version test, no behavioural probe).
Index and detail-file acceptance kept in sync.
- AGENTS.md User Preferences: cmd.exe truncates a heavily populated PATH -
tools resolvable in PowerShell may be not-found under cmd /c; use absolute
exe paths there and suspect truncation before absence.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
G-036: the CloseHandle trap script is embedded in the detail file (was a
dangling reference to session-ephemeral scratchpad). G-038: the
repl::reopen_stdin race analysis from the G-036 investigation is written in
(the prior cross-reference pointed at content that existed only in
conversation), and the goal now explicitly owns that path's fate - it runs
for real on console-EOF at an interactive prompt, and the caller-driven
restart should cover that scenario so reopen_stdin can be retired. G-037:
twapi vendorlib(5.0b1)/kit-vfs(5.2.0) drift recorded - divergence exists in
both directions, so the sync step needs explicit authority semantics.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Live CloseHandle breakpoint (WinDbgX conditional bp on the sockListLock
handle value) caught the closer: Tcl thread-exit-handler walk in a dying
Thread-extension worker, tail-calling CloseHandle. The tcludp fossil diff
1.0.12 -> current names it: 1.0.12 Windows UDP_ExitProc ("called at thread
exit") closes the process-global waitForSock and sockListLock events, so the
first udp-loaded thread to die destroys the lock for every other udp-loaded
thread. Recycled handle values turn subsequent INFINITE waits into permanent
blocks (unrecycled values fail fast - why standalone probes stayed green
while punkshell run-2 startup churn wedged 4/4). Upstream already fixed in
1.0.13/trunk (UdpThreadExitProc per-thread + ExitSockets at process exit).
Remedy: upgrade bundled tcludp to 1.0.13+; loose ends recorded (punksys 8.6
udp version check, residual trunk weaknesses as optional upstream tickets).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Instrumented traffic-enabled specimen: wedged workers blocked (not spinning)
in WaitForSingleObject(sockListLock, INFINITE) inside tcludp event-source
procs (disassembly maps both wait sites to the sockListLock static; the
SocketThread released properly and parked on waitForSock). Handle-table data
from the full dump proves both tcludp global event objects were CloseHandle`d
mid-session: the statics still hold handle values now recycled to an
IoCompletion object and a manual-reset event (tcludp only creates auto-reset
events). Waiters starve forever on unsignalable objects. Only ExitSockets
closes these handles; the sole udp-loaded thread that died mid-session (run-1
shellfilter-run worker, terminated in the run transition) is the prime
trigger suspect. Console dependence dissolved - the CONIN$ restart was simply
the only mid-session udp-thread-death scenario. Minimal-repro die-variants
(release / terminate-mimic / full punk env) do not yet reproduce; next
candidates recorded (resultvar-terminate, thread::cancel, live CloseHandle
breakpoint).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Dump pipeline proven (procdump + WinDbgX scripted -z/-c/-logo). Uninstrumented
specimen stacks: workers indistinguishable wedged-vs-idle without heartbeat
timers (all in notifier MsgWait) - round 2 needs the instrumented build to map
wedged tids to dump threads. Structural finds: tcludp runs a global helper
thread (observed parked in WaitForSingleObjectEx inside tcl9udp1012.dll);
udp_tcl.c uses an auto-reset event as a pseudo-lock taken INFINITE in every
udp-owning thread's event-loop setup/check procs; checkProc recvfroms
non-blocking sockets per pass but does not decrement packetNum on the error
path (WSAECONNRESET from ICMP port-unreachable), while setupProc forces
zero block-time poll mode whenever packetNum>0 - a stuck packetNum locks the
owning thread's event loop into permanent poll mode. Blocking-recvfrom theory
ruled out (FIONBIO at open). Round-2 plan recorded (wedged-tid stack, MsgWait
timeout argument, per-thread CPU to discriminate spin vs block).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
TEMP_REFERENCE checkouts confirmed current (Tcl core 2026-07-07, tcludp
2026-07-05). core-9-0-branch carries no tclWinConsole.c fix since 9.0.2, so
the wedge - if in the console driver - is likely still present upstream.
Current driver architecture recorded (process-global gConsoleLock, console
handle list shared across all Tcl threads, per-handle SRWLOCKs, reader/writer
threads with CONDITION_VARIABLE wakeups + Tcl_ThreadAlert fan-out) as the
credible wedge surface. Worker-side hypothesis sharpened: std-channel init on
a worker's first channel creation (udp_open / log-file open) attaches it to
the shared console machinery when the process stdin handle is the console -
fits which workers wedge vs survive, though probes have not yet reproduced.
Probe 'adopt' variant added (main thread closes stdin, CONIN$ adopted into
the stdin slot, SetStdHandle, active reader) - clean, ruling out the last
easy stdin-arrangement candidate. Approach reordered: native thread stacks
of a wedged in-context specimen promoted to step 1 (no debugger installed
yet - tool options noted).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Index entry recorded active per user. The detail file carries the full
investigation record: diagnosis chain of the piped-stdin exit/quit hang,
evidence and scoring caveats, ruled-out repro ingredients, remaining
candidates, and inline tooling listings (standalone probe script and the
hidden-console batch scorer with its 2026-07-08 baseline: punk902z run-2
syslog workers wedged 4/4, punksys 8.6 alive 4/4). Upstream reporting is the
user's manual step, gated on re-verifying against a Tcl 9 built from current
core sources.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Julian Noble