b. 150
The absence of the flats lowering g2(1) to g2(1) at the beginning of the 2nd half of the bar (or at least one of them, as Chopin would often settle for one accidental for a few notes of the same name placed in different octaves) is almost certainly Chopin's mistake. This is indicated by the comparison with bar 146, of which the discussed bar is a variational repetition, and in which g notes are certainly absent. At the same time, this is not a temporary coincidence, since the entire four-bar section (bars 150-153) is, harmonically speaking, a repetition of bars 146-149, kept in the key of E minor.
category imprint: Editorial revisions
issues: Omission of current key accidentals, Errors of A
notation: Pitch