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authorAlex Lam S.L <alexlamsl@gmail.com>2017-03-05 13:09:27 +0800
committerGitHub <noreply@github.com>2017-03-05 13:09:27 +0800
commitb33e7f88e60f886ee3403c82ac2e3fb40caa698f (patch)
tree76d221f44841840055a1187baca0bb3d5c5af009 /lib/scope.js
parent1f0333e9f146311e0e412fbd0783c0e1e63c7802 (diff)
downloadtracifyjs-b33e7f88e60f886ee3403c82ac2e3fb40caa698f.tar.gz
tracifyjs-b33e7f88e60f886ee3403c82ac2e3fb40caa698f.zip
improve `unsafe` on undefined (#1548)
`unsafe` turns undefined keyword into a variable of the same name if found, but that interferes with other related optimisations. Keep track of such transformations to ensure zero information loss in the process.
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