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Transition shorthand property throws error because of sourcemaps (3.7.1)

See original GitHub issue

Originally posted to gulp-less https://github.com/gulp-community/gulp-less/issues/299. But the issue is with the LESS itself.

lessc 3.7.1 => Error with lessc --source-map=file.map styles.less styles.css:

SyntaxError: Cannot read property 'substring' of undefined in /Users/.../components/button.less on line 62, column 3:
61   cursor: pointer;
62   transition: background-color @duration-short @easing-out;
63   border-radius: @base-border-radius;

gulp-less 4.0.1 stacktrace of the error is telling more:

Potentially unhandled rejection [2] TypeError: Cannot read property 'substring' of undefined
    at SourceMapOutput.add (/Users/.../node_modules/less/lib/less/source-map-output.js:72:39)
    at Call.genCSS (/Users/.../node_modules/less/lib/less/tree/call.js:86:12)
    at Expression.genCSS (/Users/.../node_modules/less/lib/less/tree/expression.js:54:23)
    at Declaration.genCSS (/Users/.../node_modules/less/lib/less/tree/declaration.js:35:20)
    at Ruleset.genCSS (/Users/.../node_modules/less/lib/less/tree/ruleset.js:508:18)
    at Ruleset.genCSS (/Users/.../node_modules/less/lib/less/tree/ruleset.js:508:18)
    at SourceMapOutput.toCSS (/Users/.../node_modules/less/lib/less/source-map-output.js:123:24)
    at SourceMapBuilder.toCSS (/Users/.../node_modules/less/lib/less/source-map-builder.js:23:35)
    at ParseTree.toCSS (/Users/.../node_modules/less/lib/less/parse-tree.js:33:47)
    at /Users/.../node_modules/less/lib/less/render.js:35:40
    at /Users/.../node_modules/less/lib/less/parse.js:86:21
    at ImportVisitor.finish [as _finish] (/Users/.../node_modules/less/lib/less/parser/parser.js:240:28)
    at ImportVisitor._onSequencerEmpty (/Users/.../node_modules/less/lib/less/visitors/import-visitor.js:36:14)
    at ImportSequencer.tryRun (/Users/.../node_modules/less/lib/less/visitors/import-sequencer.js:50:14)
    at /Users/.../node_modules/less/lib/less/visitors/import-sequencer.js:19:25
    at fileParsedFunc (/Users/.../node_modules/less/lib/less/import-manager.js:63:17)
    at /Users/.../node_modules/less/lib/less/import-manager.js:137:25
    at finish (/Users/.../node_modules/less/lib/less/parser/parser.js:240:28)
    at Object.parse (/Users/.../node_modules/less/lib/less/parser/parser.js:248:24)
    at loadFileCallback (/Users/.../node_modules/less/lib/less/import-manager.js:136:68)
    at <anonymous>

It works fine without sourcemaps option.

Issue Analytics

State:
Created 5 years ago
Comments:9 (6 by maintainers)

Top GitHub Comments

1reaction

matthew-deancommented, Aug 8, 2018

v3.8.1 released

0reactions

matthew-deancommented, Aug 7, 2018

@mahish Great!

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