https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118582
Bug ID: 118582
Summary: [modules] Bad file data when building <thread> as a
header module
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nshead at gcc dot gnu.org
Blocks: 103524
Target Milestone: ---
On current trunk, the following command:
g++ -std=c++26 -fmodules -xc++-system-header array format thread
Results in the following:
In module imported at /.../thread:55:1:
/.../format: In function ‘std::basic_ostream<_CharT, _Traits>&
std::operator<<(basic_ostream<_CharT, _Traits>&, thread::id)’:
/.../format: error: failed to read compiled module cluster 1154: Bad file data
[-Wtemplate-body]
/.../format: note: compiled module file is ‘gcm.cache/./.../format.gcm’
/.../format: error: failed to read compiled module cluster 1914: Bad file data
[-Wtemplate-body]
/.../format: error: failed to read compiled module cluster 1936: Bad file data
[-Wtemplate-body]
/.../thread:113:53: fatal error: failed to load pendings for
‘std::__conditional_t’
113 | thread::native_handle_type>;
| ^
compilation terminated.
A similar error occurs with the addition of -fno-module-lazy:
In module imported at /.../thread:55:1:
/.../format: error: failed to read compiled module cluster 1154: Bad file data
/.../format: note: compiled module file is ‘gcm.cache/./.../format.gcm’
/.../thread: In destructor ‘std::__codecvt_abstract_base<_InternT, _ExternT,
_StateT>::~__codecvt_abstract_base() [with _InternT = char16_t; _ExternT =
char; _StateT = __mbstate_t]’:
/.../thread:55:76: fatal error: failed to load pendings for
‘std::__codecvt_abstract_base’
55 | # include <format>
|
It appears that the module CMI that's been built has been corrupted in some
way.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103524
[Bug 103524] [meta-bug] modules issue
