Revert "gh-148395: Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor (GH-148396)"

This reverts commit 8fc66ae.

Author: prakashsellathurai

Misc/NEWS.d/next/Security/2026-04-10-16-28-21.gh-issue-148395.kfzm0G.rst

@@ -571,7 +571,6 @@ decompress(BZ2Decompressor *d, char *data, size_t len, Py_ssize_t max_length)
     return result;
 
 error:
-    bzs->next_in = NULL;
     Py_XDECREF(result);
     return NULL;
 }

Modules/_bz2module.c

@@ -1100,7 +1100,6 @@ decompress(Decompressor *d, uint8_t *data, size_t len, Py_ssize_t max_length)
     return result;
 
 error:
-    lzs->next_in = NULL;
     Py_XDECREF(result);
     return NULL;
 }

Modules/_lzmamodule.c

@@ -1669,7 +1669,6 @@ decompress(ZlibDecompressor *self, uint8_t *data,
     return result;
 
 error:
-    self->zst.next_in = NULL;
     Py_XDECREF(result);
     return NULL;
 }