Mercurial > hg
annotate tests/test-filecache.py @ 30706:2e4862646f02
repair: speed up stripping of many roots
repair.strip() expects a set of root revisions to strip. It then
builds the full set of descedants by walking the descandants of
each. It is rare that more than a few roots get passed in, but if that
happens, it will wastefully walk the changelog for each root. So let's
just walk it once.
I noticed this because the narrowhg extension was passing not only
roots, but all the commits to strip. When there were tens of thousands
of commits to strip, this resulted in quadratic behavior with that
extension.
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 04 Jan 2017 10:07:12 -0800 |
parents | d83ca854fa21 |
children | 21fa3d3688f3 |
rev | line source |
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1 from __future__ import absolute_import, print_function |
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2 import os |
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3 import subprocess |
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4 import sys |
14928 | 5 |
16683 | 6 if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'], |
7 'cacheable']): | |
14928 | 8 sys.exit(80) |
9 | |
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10 from mercurial import ( |
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11 extensions, |
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12 hg, |
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13 scmutil, |
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14 ui as uimod, |
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15 util, |
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16 ) |
14928 | 17 |
18 filecache = scmutil.filecache | |
19 | |
20 class fakerepo(object): | |
21 def __init__(self): | |
22 self._filecache = {} | |
23 | |
24 def join(self, p): | |
25 return p | |
26 | |
27 def sjoin(self, p): | |
28 return p | |
29 | |
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30 @filecache('x', 'y') |
14928 | 31 def cached(self): |
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32 print('creating') |
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33 return 'string from function' |
14928 | 34 |
35 def invalidate(self): | |
36 for k in self._filecache: | |
37 try: | |
38 delattr(self, k) | |
39 except AttributeError: | |
40 pass | |
41 | |
42 def basic(repo): | |
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43 print("* neither file exists") |
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44 # calls function |
14928 | 45 repo.cached |
46 | |
47 repo.invalidate() | |
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48 print("* neither file still exists") |
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49 # uses cache |
14928 | 50 repo.cached |
51 | |
52 # create empty file | |
53 f = open('x', 'w') | |
54 f.close() | |
55 repo.invalidate() | |
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56 print("* empty file x created") |
14928 | 57 # should recreate the object |
58 repo.cached | |
59 | |
60 f = open('x', 'w') | |
61 f.write('a') | |
62 f.close() | |
63 repo.invalidate() | |
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64 print("* file x changed size") |
14928 | 65 # should recreate the object |
66 repo.cached | |
67 | |
68 repo.invalidate() | |
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69 print("* nothing changed with either file") |
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70 # stats file again, reuses object |
14928 | 71 repo.cached |
72 | |
73 # atomic replace file, size doesn't change | |
74 # hopefully st_mtime doesn't change as well so this doesn't use the cache | |
75 # because of inode change | |
76 f = scmutil.opener('.')('x', 'w', atomictemp=True) | |
77 f.write('b') | |
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78 f.close() |
14928 | 79 |
80 repo.invalidate() | |
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81 print("* file x changed inode") |
14928 | 82 repo.cached |
83 | |
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84 # create empty file y |
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85 f = open('y', 'w') |
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86 f.close() |
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87 repo.invalidate() |
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88 print("* empty file y created") |
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89 # should recreate the object |
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90 repo.cached |
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91 |
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92 f = open('y', 'w') |
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93 f.write('A') |
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94 f.close() |
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95 repo.invalidate() |
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96 print("* file y changed size") |
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97 # should recreate the object |
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98 repo.cached |
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99 |
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100 f = scmutil.opener('.')('y', 'w', atomictemp=True) |
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101 f.write('B') |
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102 f.close() |
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103 |
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104 repo.invalidate() |
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105 print("* file y changed inode") |
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106 repo.cached |
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107 |
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108 f = scmutil.opener('.')('x', 'w', atomictemp=True) |
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109 f.write('c') |
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110 f.close() |
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111 f = scmutil.opener('.')('y', 'w', atomictemp=True) |
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112 f.write('C') |
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113 f.close() |
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114 |
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115 repo.invalidate() |
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116 print("* both files changed inode") |
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117 repo.cached |
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118 |
14928 | 119 def fakeuncacheable(): |
120 def wrapcacheable(orig, *args, **kwargs): | |
121 return False | |
122 | |
123 def wrapinit(orig, *args, **kwargs): | |
124 pass | |
125 | |
126 originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit) | |
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127 origcacheable = extensions.wrapfunction(util.cachestat, 'cacheable', |
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128 wrapcacheable) |
14928 | 129 |
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130 for fn in ['x', 'y']: |
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131 try: |
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132 os.remove(fn) |
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133 except OSError: |
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134 pass |
14928 | 135 |
136 basic(fakerepo()) | |
137 | |
138 util.cachestat.cacheable = origcacheable | |
139 util.cachestat.__init__ = originit | |
140 | |
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141 def test_filecache_synced(): |
26098 | 142 # test old behavior that caused filecached properties to go out of sync |
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143 os.system('hg init && echo a >> a && hg ci -qAm.') |
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144 repo = hg.repository(uimod.ui.load()) |
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145 # first rollback clears the filecache, but changelog to stays in __dict__ |
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146 repo.rollback() |
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147 repo.commit('.') |
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148 # second rollback comes along and touches the changelog externally |
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149 # (file is moved) |
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150 repo.rollback() |
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151 # but since changelog isn't under the filecache control anymore, we don't |
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152 # see that it changed, and return the old changelog without reconstructing |
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153 # it |
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154 repo.commit('.') |
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155 |
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156 def setbeforeget(repo): |
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157 os.remove('x') |
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158 os.remove('y') |
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159 repo.cached = 'string set externally' |
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160 repo.invalidate() |
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161 print("* neither file exists") |
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162 print(repo.cached) |
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163 repo.invalidate() |
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164 f = open('x', 'w') |
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165 f.write('a') |
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166 f.close() |
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167 print("* file x created") |
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168 print(repo.cached) |
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169 |
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170 repo.cached = 'string 2 set externally' |
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171 repo.invalidate() |
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172 print("* string set externally again") |
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173 print(repo.cached) |
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174 |
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175 repo.invalidate() |
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176 f = open('y', 'w') |
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177 f.write('b') |
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178 f.close() |
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179 print("* file y created") |
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180 print(repo.cached) |
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181 |
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182 def antiambiguity(): |
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183 filename = 'ambigcheck' |
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184 |
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185 # try some times, because reproduction of ambiguity depends on |
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186 # "filesystem time" |
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187 for i in xrange(5): |
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188 fp = open(filename, 'w') |
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189 fp.write('FOO') |
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190 fp.close() |
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191 |
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192 oldstat = os.stat(filename) |
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193 if oldstat.st_ctime != oldstat.st_mtime: |
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194 # subsequent changing never causes ambiguity |
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195 continue |
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196 |
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197 repetition = 3 |
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198 |
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199 # repeat changing via checkambigatclosing, to examine whether |
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200 # st_mtime is advanced multiple times as expected |
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201 for i in xrange(repetition): |
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202 # explicit closing |
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203 fp = scmutil.checkambigatclosing(open(filename, 'a')) |
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204 fp.write('FOO') |
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205 fp.close() |
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206 |
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207 # implicit closing by "with" statement |
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208 with scmutil.checkambigatclosing(open(filename, 'a')) as fp: |
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209 fp.write('BAR') |
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210 |
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211 newstat = os.stat(filename) |
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212 if oldstat.st_ctime != newstat.st_ctime: |
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213 # timestamp ambiguity was naturally avoided while repetition |
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214 continue |
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215 |
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216 # st_mtime should be advanced "repetition * 2" times, because |
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217 # all changes occurred at same time (in sec) |
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218 expected = (oldstat.st_mtime + repetition * 2) & 0x7fffffff |
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219 if newstat.st_mtime != expected: |
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220 print("'newstat.st_mtime %s is not %s (as %s + %s * 2)" % |
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221 (newstat.st_mtime, expected, oldstat.st_mtime, repetition)) |
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222 |
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223 # no more examination is needed regardless of result |
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224 break |
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225 else: |
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226 # This platform seems too slow to examine anti-ambiguity |
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227 # of file timestamp (or test happened to be executed at |
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228 # bad timing). Exit silently in this case, because running |
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229 # on other faster platforms can detect problems |
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230 pass |
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231 |
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232 print('basic:') |
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233 print() |
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235 print() |
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236 print('fakeuncacheable:') |
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237 print() |
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239 test_filecache_synced() |
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240 print() |
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241 print('setbeforeget:') |
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242 print() |
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243 setbeforeget(fakerepo()) |
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244 print() |
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245 print('antiambiguity:') |
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246 print() |
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247 antiambiguity() |