https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114630
Bug ID: 114630
Summary: [modules] building module with submodule causes
corrupt gcm
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nickbegg at gmail dot com
Target Milestone: ---
Building module code with a submodule produces - failed to load pendings for
‘std::__format::__formatter_int’
This is similar to PR99426. Using test code very similar to PR113930 and
PR114229. this is compiling with a trunk debug gcc, with the patch proposed for
PR99426 applied.
% /home/nick/inst/gcc-trunk-debug/bin/g++ --version
g++ (GCC) 14.0.1 20240405 (experimental)
Test code -
// modA.mpp
module;
#include <format>
export module modA;
import modB;
// modB.mpp
module;
#include <format>
export module modB;
// main.cpp
#include <format>
import modA;
//
Compiling trips over when loading modA when compiling main.cpp. Output -
modB.mpp:
/home/nick/inst/gcc-trunk-debug/bin/g++ -g -std=gnu++23 -Wall -Wextra
-freport-bug --param=ggc-min-expand=10000 -MD -MT
CMakeFiles/moduleMin.dir/modB.mpp.o -MF CMakeFiles/moduleMin.dir/modB.mpp.o.d
-fmodules-ts -fmodule-mapper=CMakeFiles/moduleMin.dir/modB.mpp.o.modmap -MD
-fdeps-format=p1689r5 -x c++ -o CMakeFiles/moduleMin.dir/modB.mpp.o -c
/home/nick/src/moduleMin/modB.mpp
modA.mpp:
/home/nick/inst/gcc-trunk-debug/bin/g++ -g -std=gnu++23 -Wall -Wextra
-freport-bug --param=ggc-min-expand=10000 -MD -MT
CMakeFiles/moduleMin.dir/modA.mpp.o -MF CMakeFiles/moduleMin.dir/modA.mpp.o.d
-fmodules-ts -fmodule-mapper=CMakeFiles/moduleMin.dir/modA.mpp.o.modmap -MD
-fdeps-format=p1689r5 -x c++ -o CMakeFiles/moduleMin.dir/modA.mpp.o -c
/home/nick/src/moduleMin/modA.mpp
main.cpp:
/home/nick/inst/gcc-trunk-debug/bin/g++ -g -std=gnu++23 -Wall -Wextra
-freport-bug --param=ggc-min-expand=10000 -MD -MT
CMakeFiles/moduleMin.dir/main.cpp.o -MF CMakeFiles/moduleMin.dir/main.cpp.o.d
-fmodules-ts -fmodule-mapper=CMakeFiles/moduleMin.dir/main.cpp.o.modmap -MD
-fdeps-format=p1689r5 -x c++ -o CMakeFiles/moduleMin.dir/main.cpp.o -c
/home/nick/src/moduleMin/main.cpp
In module imported at /home/nick/src/moduleMin/main.cpp:3:1:
modA: error: failed to read compiled module cluster 3008: Bad file data
modA: note: compiled module file is ‘CMakeFiles/moduleMin.dir/modA.gcm’
modA: error: failed to read compiled module cluster 3009: Bad file data
In file included from /home/nick/src/moduleMin/main.cpp:1:
/home/nick/inst/gcc-trunk-debug/include/c++/14.0.1/format:1899:35: fatal error:
failed to load pendings for ‘std::__format::__formatter_int’
1899 | return _M_f._M_parse<char>(__pc);
| ~~~~~~~~~~~~~~~~~~~^~~~~~
compilation terminated.
