CONSOLE ERROR: line 57: Uncaught TypeError: Cannot read property 'dispatchMessage' of undefined
Verify that inline sourcemap has proper URL and compiledURL.

SourceMap Loaded:
url: data:application/json;base64,eyJmaWxlIjoiY29tcGlsZWQuanMiLCJtYXBwaW5ncyI6IkFBQVNBLFFBQUFBLElBQUcsQ0FBQ0MsQ0FBRCxDQUFhQyxDQUFiLENBQ1osQ0FDSSxNQUFPRCxFQUFQLENBQW9CQyxDQUR4QixDQUlBLElBQUlDLE9BQVM7Iiwic291cmNlcyI6WyJzb3VyY2UuanMiXSwic291cmNlc0NvbnRlbnQiOlsiPHNvdXJjZSBjb250ZW50PiJdfQ==
compiledURL: test://evaluations/0/inline-source-map-loading.js

