diff options
| -rw-r--r-- | src/img/png.nim | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/img/png.nim b/src/img/png.nim index 247c3395..416c4541 100644 --- a/src/img/png.nim +++ b/src/img/png.nim @@ -380,7 +380,11 @@ proc readIDAT(reader: var PNGReader) = reader.strm.avail_out = cuint(olen) reader.strm.next_out = addr reader.idatBuf[reader.idatAt] let res = inflate(addr reader.strm, Z_NO_FLUSH) - doAssert res != Z_STREAM_ERROR + if res == Z_STREAM_ERROR: + if reader.strm.msg != nil: + reader.err "zstream error: " & $reader.strm.msg + else: + reader.err "unknown zstream error" case res of Z_NEED_DICT, Z_DATA_ERROR, Z_MEM_ERROR, Z_BUF_ERROR: # Z_BUF_ERROR is fatal here, as outlen is at least as large as idat. |