tools/bisect/README.md: added section about bisecting crashes / triag…

…e_version.py: skip some bogus commit hashes and version encountered in my bisect archive (#6145)

tools/bisect/README.md

@@ -93,6 +93,16 @@ To bisect these kinds of regressions you currently need to adjust the `bisect.sh
 `1` - find the commit which started the hang<br/>
 `2` - find the commit which resolved the hang<br/>
 
+# Bisecting crashes
+
+To bisect when a crash was introduced just do the same as you would for a regular error.
+
+But if you want to find the commit which fixes a crash you need to add `-j2` to the options so the crash will generate an error instead of terminating the process and check for the expected string `crashed`.
+
+```
+./bisect.sh <hash-good> <hash-bad> "<cppcheck-options> -j2" "crashed"
+```
+
 ### General notes
 
 As we are currently using the process exitcode to pass the elapsed time to the script it will not work properly with vey long runtime (>= 255 seconds) as it will overflow.

tools/triage_py/triage_version.py

@@ -89,6 +89,17 @@ def sort_commit_hashes(commits):
     # this is the commit hash for the 2.9 release tag. it does not exist in the main branch so the version for it cannot be determined
     if versions.count('aca3f6fef'):
         versions.remove('aca3f6fef')
+    # 2.8 tags
+    if versions.count('61f846073'):
+        versions.remove('61f846073')
+    if versions.count('f998703a5'):
+        versions.remove('f998703a5')
+    # ???
+    if versions.count('d4505827b'):
+        versions.remove('d4505827b')
+    # 2.6 tag
+    if versions.count('d873b8e77'):
+        versions.remove('d873b8e77')
     len_in = len(versions)
     versions = sort_commit_hashes(versions)
     if len(versions) != len_in:
@@ -124,6 +135,9 @@ def sort_commit_hashes(commits):
         # sanitize version
         version = version.replace('Cppcheck ', '').replace(' dev', '')
 
+    if version == 'CPPCHECK_MAJOR.CPPCHECK_DEVMINOR':
+        continue
+
     cmd = [exe]
     if do_compare and not args.no_quiet:
         cmd.append('-q')