prevent input source map mutation (#3781)
authorAlex Lam S.L <alexlamsl@gmail.com>
Wed, 15 Apr 2020 09:25:58 +0000 (10:25 +0100)
committerGitHub <noreply@github.com>
Wed, 15 Apr 2020 09:25:58 +0000 (17:25 +0800)
commit6e9afdc94fd51a827e9d9db51d650e15681866d3
treeae59f88dc3900c24fa47b2a86fb34e097eaa95c3
parentc4d28e3b2a2d82c7e5e3b398513755b507a75e76
prevent input source map mutation (#3781)

fixes #3780
lib/sourcemap.js
test/mocha/sourcemaps.js