[GNATS 23549] cp_gen_be configuration: Segfault in walking name reference entries due to stack overflow

[jhsedg]

Customer bug ID

several, gnats/_23549.C

Description

​This segfault is in my cp_gen_be config (mjh-cpgen).
​
​The preprocessed file is in gnats.
​
​[ellen@lin1 status]$ CPFE=/home/ellen/cpfe/bases/mjh-cpgen/bin/cpfe eccp --c++17 --gnu_version
​80100 -tused -w /tmp/boost.seg.C
​Segmentation fault (core dumped)
​eccp: front end returned an exit status of 139
​BFD: Warning: /home/ellen/boost/boost_1_74_0.cpgen/status/core.155707 is truncated: expected co
​re file size >= 1320951808, found: 11542528.
​Cannot access memory at address 0x7ffff7ffe128
​Cannot access memory at address 0x7ffff7ffe120
​Failed to read a valid object file image from memory.
​Cannot access memory at address 0x7fffff7ff0a8
​-----> Context in _ZN3edgL11write_entryEPcNS_16an_il_entry_kindEm ():
​Called during IL tree traversal to write an entry to the IL file. Called
​directly for string entries, and from write_nonstring_entry for all
​other entries. entry_kind indicates the kind of entry, and entry_length
​its length.
​*/
​{
​-----> Abbreviated stack trace:
​write_entry
​write_entry
​-----> Segmentation fault crash signatures: 8d21d4ca1b2fe10a4774a69e00940536 from 3d1650cdd90cf6f53b83d63cb6d990d0

Notes

​ellen, 2020-11-09:
​MikeH thinks this might be related to EDGcpfe/23328 and EDGcpfe/23190