Fails to compile GLSL with quotes in the comments

[shamansir]

Elm v0.19.

While elm make works and compiles this GLSL code (it uses elm-explorations/webgl, see examples there), elm-webpack-loader fails to run it:

fragmentShader : WebGL.Shader {} Uniforms { vcolor : Vec3 }
fragmentShader =
    [glsl|

        precision mediump float;
        varying vec3 vcolor;

        // foo'bar
        void main () {
            gl_FragColor = vec4(vcolor, 1.0);
        }

    |]

If I change // foo'bar to // foobar, webpack compilation works good. There is also the similar error for multi-line shader comment like /* foo'bar */.

The error for // foo'bar case is:

ERROR in ./src/Main.elm 16987:94
Module parse failed: Expecting Unicode escape sequence \uXXXX (16987:94)
You may need an appropriate loader to handle this file type.
| 	});
| var author$project$Layer$Template$fragmentShader = {
> 	src: '\n\n        precision mediump float;\n        varying vec3 vcolor;\n        // foo'bar\n\n        void main () {\n            gl_FragColor = vec4(vcolor, 1.0);\n        }\n\n    ',
| 	attributes: {},
| 	uniforms: {}
 @ ./index.js 17:12-37
 @ multi (webpack)-dev-server/client?http://localhost:8080 ./index.js
ℹ ｢wdm｣: Failed to compile.

The error for /* foo'bar */ case is:

ERROR in ./src/Main.elm 16987:90
Module parse failed: Unexpected token (16987:90)
You may need an appropriate loader to handle this file type.
| 	});
| var author$project$Layer$Template$fragmentShader = {
> 	src: '\n\n        precision mediump float;\n        varying vec3 vcolor;\n        /* foo'bar */\n\n        void main () {\n            gl_FragColor = vec4(vcolor, 1.0);\n        }\n\n    ',
| 	attributes: {},
| 	uniforms: {}
 @ ./index.js 17:12-37
 @ multi (webpack)-dev-server/client?http://localhost:8080 ./index.js