** Description changed:

  Hi, there.
  
  There is a segmentation caused by null pointer dereference that leads to
- a fatal error during the execution in the newest master branch 597be1f.
+ a fatal error during the execution in the newest version 0.631.
  
  This is the output during execution:
  
  Decompressing...
  Bad checksum: 0x5b496f91 - expected: 0x2000210c
  Fatal error - exiting
  Segmentation fault
  
  To reproduce, run:
  
  lrzip -t seg-stream1523
  
  Here is the trace reported by ASAN:
  
  ==161258==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000080 (pc 
0x00000043f8d8 bp 0x0000007cd680 sp 0x7f811dafdd80 T3)
-     #0 0x43f8d7 in ucompthread ../stream.c:1523
-     #1 0x7f81218fc6b9 in start_thread 
(/lib/x86_64-linux-gnu/libpthread.so.0+0x76b9)
-     #2 0x7f8120d2e41c in clone (/lib/x86_64-linux-gnu/libc.so.6+0x10741c)
+     #0 0x43f8d7 in ucompthread ../stream.c:1523
+     #1 0x7f81218fc6b9 in start_thread 
(/lib/x86_64-linux-gnu/libpthread.so.0+0x76b9)
+     #2 0x7f8120d2e41c in clone (/lib/x86_64-linux-gnu/libc.so.6+0x10741c)
  
  AddressSanitizer can not provide additional info.
  SUMMARY: AddressSanitizer: SEGV ../stream.c:1523 ucompthread
  Thread T3 created by T0 here:
-     #0 0x7f81221941e3 in pthread_create 
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x361e3)
-     #1 0x4516f3 in create_pthread ../stream.c:133
-     #2 0x4516f3 in fill_buffer ../stream.c:1699
-     #3 0x4516f3 in read_stream ../stream.c:1786
+     #0 0x7f81221941e3 in pthread_create 
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x361e3)
+     #1 0x4516f3 in create_pthread ../stream.c:133
+     #2 0x4516f3 in fill_buffer ../stream.c:1699
+     #3 0x4516f3 in read_stream ../stream.c:1786
  
  ==161258==ABORTING

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https://bugs.launchpad.net/bugs/1893917

Title:
  Segmentation fault caused by null pointer dereference during
  multithread processing in ucompthread, stream.c:1523

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