Avoid duplicated identifier sharing location - fixes T7436

2016-07-18 20:49:14 -07:00
parent a1c2d4dd5d
commit ea426baa07
4 changed files with 22 additions and 1 deletions
--- a/packages/babel-plugin-transform-regenerator/src/hoist.js
+++ b/packages/babel-plugin-transform-regenerator/src/hoist.js
@@ -26,7 +26,9 @@ exports.hoist = function(funPath) {
    let exprs = [];

    vdec.declarations.forEach(function(dec) {
-      vars[dec.id.name] = dec.id;
+      // Note: We duplicate 'dec.id' here to ensure that the variable declaration IDs don't
+      // have the same 'loc' value, since that can make sourcemaps and retainLines behave poorly.
+      vars[dec.id.name] = t.identifier(dec.id.name);

      if (dec.init) {
        exprs.push(t.assignmentExpression(