Chopin prolonged pedal in this place, which is proven by 
having been crossed out at the end of b. 53 (which we can see in A). The composer's intention was distorted in FE (→EE) by placing the mark a quaver earlier. A similar shift of the mark (for the pedal to encompass the first octave of the chromatic bass sequence) can also be seen in A in b. 50.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations; Source & stylistic information
issues: Inaccuracies in FE, Corrections in A, Deletions in A
notation: Pedalling