[BUG] invalid tag name with iterators in --gdb mode #5552
Description
Describe the bug
$ cat example.pyx
def use_an_iterator(iterator):
return (x for x in iterator)
$ cython3 --version
Cython version 3.0.0
$ cython3 -3 example.pyx
$ cython3 -3 --gdb example.pyx
Error compiling Cython file:
------------------------------------------------------------
...
def use_an_iterator(iterator):
^
------------------------------------------------------------
example.pyx:1:0: Compiler crash in DebugTransform
Compiler crash traceback from this point on:
File "Cython/Compiler/Visitor.py", line 182, in Cython.Compiler.Visitor.TreeVisitor._visit
File "/usr/lib/python3.11/site-packages/Cython/Compiler/ParseTreeTransforms.py", line 4033, in visit_ModuleNode
self.visit_FuncDefNode(nested_funcdef)
File "/usr/lib/python3.11/site-packages/Cython/Compiler/ParseTreeTransforms.py", line 4093, in visit_FuncDefNode
self.tb.start(arg.name)
File "/usr/lib/python3.11/site-packages/Cython/Debugger/DebugWriter.py", line 42, in start
self.tb.start(name, attrs or {})
File "src/lxml/saxparser.pxi", line 841, in lxml.etree.TreeBuilder.start
File "src/lxml/saxparser.pxi", line 769, in lxml.etree.TreeBuilder._handleSaxStart
File "src/lxml/apihelpers.pxi", line 179, in lxml.etree._makeSubElement
File "src/lxml/apihelpers.pxi", line 1754, in lxml.etree._tagValidOrRaise
ValueError: Invalid tag name '.0'
Code to reproduce the behaviour:
def use_an_iterator(iterator):
return (x for x in iterator)Expected behaviour
No response
OS
linux
Python version
3.11.4
Cython version
No response
Additional context
This happens only if python lxml package is installed.
I reduced it to the simple function above, but this happens a lot in sagemath source code.
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