lock: block signal interrupt while making a lock file On Windows where symlink isn't supported, util.makelock() could leave an empty file if interrupted immediately after os.open(). This empty lock never dies as it has no process id recorded. ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) # an interrupt may occur here os.write(ld, info) os.close(ld) This was a long-standing bug of TortoiseHg which runs a command-server and kills it by CTRL_C_EVENT, reported by random Windows users. https://bitbucket.org/tortoisehg/thg/issues/4873/#comment-43591129 At first, I tried to fix makelock() to clean up a stale lock file, which turned out to be hard because any instructions may be interrupted by a signal. ld = None try: # CALL_FUNCTION # os.open(...) # an interrupt may occur here # STORE_FAST # ld = ... ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) os.write(ld, info) ... return True except: if ld: ... os.unlink(pathname) return False So I decided to block signals by temporarily replacing the signal handlers so makelcok() and held = 1 will never be interrupted. Many thanks to Fernando Najera for investigating the issue.

fuzz: add some more docs about building/running fuzzers Differential Revision: https://phab.mercurial-scm.org/D2635

util: also silence py3 warnings from codec module Fixes warnings like this: + mercurial/util.py:2446: DeprecationWarning: invalid escape sequence '\d' + return codecs.escape_decode(s)[0] Differential Revision: https://phab.mercurial-scm.org/D2642

test-annotate: set stdin and stdout to binary to get CR unmodified

test-annotate: rewrite sed with some python I hope this will fix the test failure seen on FreeBSD and Windows.

docs: small fixes for profiling.nested and the overall description - profiling.nested defaults to 0, not 5 - profiling is not always done with lsprof Differential Revision: https://phab.mercurial-scm.org/D2641

scmutil: fix oversight in b76248e51605c6 where I forgot to use msg Thanks to Yuya for spotting my mistake. Differential Revision: https://phab.mercurial-scm.org/D2636

hghave: remove unused "as ex" in exception block I overlooked this when removing a debug print in another change. Differential Revision: https://phab.mercurial-scm.org/D2637

tests: port test-log to Python 3 Required some porting to >>> inline Python instead of using heredocs into $PYTHON. Differential Revision: https://phab.mercurial-scm.org/D2621

py3: make gettext domain a system string