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Fix RangeError on large files #86

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Fix RangeError on large files #86

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10 changes: 8 additions & 2 deletions source-map-support.js
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Original file line number Diff line number Diff line change
Expand Up @@ -84,13 +84,19 @@ function retrieveSourceMapURL(source) {

// Get the URL of the source map
fileData = retrieveFile(source);
var re = /\/\/[#@]\s*sourceMappingURL=([^'"]+)\s*$/mg;
var re = /\/\/[#@]\s*sourceMappingURL=/mg;
// Keep executing the search to find the *last* sourceMappingURL to avoid
// picking up sourceMappingURLs from comments, strings, etc.
var lastMatch, match;
while (match = re.exec(fileData)) lastMatch = match;
if (!lastMatch) return null;
return lastMatch[1];

var begin = lastMatch.index + lastMatch[0].length;
var end = fileData.indexOf("\n", begin);
if (end < 0) end = fileData.length;
while (end > begin && fileData[end - 1].match(/\s/)) end--;

return fileData.substring(begin, end);
};

// Can be overridden by the retrieveSourceMap option to install. Takes a
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