Gulp concat seems to have issue with gulp sourcemaps

[sachinsingh-nodejs]

I get following error when I use gulp sourcemaps with concat

Error: Invalid mapping: {"generated":{"line":1,"column":9},"source":"bootstrap/mixins/_clearfix.scss","original":{"line":14,"column":-7},"name":null}
at SourceMapGenerator_validateMapping [as _validateMapping] (D:\POCs\RIC_Redesign\node_modules\source-map\lib\source-map-generator.js:277:13)
at SourceMapGenerator_addMapping [as addMapping] (D:\POCs\RIC_Redesign\node_modules\source-map\lib\source-map-generator.js:101:12)
at D:\POCs\RIC_Redesign\node_modules\concat-with-sourcemaps\index.js:60:28
at Array.forEach (native)
at SourceMapConsumer_eachMapping [as eachMapping] (D:\POCs\RIC_Redesign\node_modules\source-map\lib\source-map-consumer.js:155:14)
at Concat.add (D:\POCs\RIC_Redesign\node_modules\concat-with-sourcemaps\index.js:58:18)
at DestroyableTransform.bufferContents [as _transform] (D:\POCs\RIC_Redesign\node_modules\gulp-concat\index.js:68:12)
at DestroyableTransform.Transform._read (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_transform.js:159:10)
at DestroyableTransform.Transform._write (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_transform.js:147:83)
at doWrite (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_writable.js:347:64)
at writeOrBuffer (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_writable.js:336:5)
at DestroyableTransform.Writable.write (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_writable.js:274:11)
at DestroyableTransform.ondata (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_readable.js:546:20)
at emitOne (events.js:96:13)
at DestroyableTransform.emit (events.js:188:7)
at readableAddChunk (D:\POCs\RIC_Redesign\node_modules\readable-stream\lib_stream_readable.js:217:18)

[yocontra]

Can you provide a full code sample?

[giosh94mhz]

Same issue for me, but it seems not related to concat.

The bug is in libsass and confirmed in gulp-sass, but not fixed yet.

As a workaround, downgrade gulp-sass to ^2.3.2

[mahnunchik]

Any news?

[yocontra]

Bug is with another library (libsass) not gulp-concat so I'm going to close this. Needs to be fixed in libsass. If anyone has a problem not related to sass I will reopen.