*** WARNING *** there are active plugins, do not report this as a bug unless you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_FINISH                    | m2rte
in pp_format, at pretty-print.cc:1478
0x2cf8f75 pp_format(pretty_printer*, text_info*)
	../../gcc-git/gcc/pretty-print.cc:1478
0x2ccb29d diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
	../../gcc-git/gcc/diagnostic.cc:1548
0xbbcb37 m2linemap_ErrorAtf
	../../gcc-git/gcc/m2/gm2-gcc/m2linemap.cc:194
0xc969b7 M2Emit_EmitError
	m2/gm2-compiler-boot/M2Emit.c:75
0xbef8dc FlushAll
	m2/gm2-compiler-boot/M2Error.c:2416
0xbf10f8 M2Error_FlushErrors
	m2/gm2-compiler-boot/M2Error.c:3024
0xc476b6 PCSymBuild_PCEndBuildProgModule
	m2/gm2-compiler-boot/PCSymBuild.c:2213
0xc7c18c ProgramModule
	m2/gm2-compiler-boot/PCBuild.c:3477
0xc7c373 ImplementationOrProgramModule
	m2/gm2-compiler-boot/PCBuild.c:3565
0xc7c047 FileUnit
	m2/gm2-compiler-boot/PCBuild.c:3420
0xc83053 PCBuild_CompilationUnit
	m2/gm2-compiler-boot/PCBuild.c:8183
0xbee3c6 DoPassC
	m2/gm2-compiler-boot/M2Comp.c:642
0xbed8ba Compile
	m2/gm2-compiler-boot/M2Comp.c:201
0xbee63e M2Comp_compile
	m2/gm2-compiler-boot/M2Comp.c:768
0xbc7f4b init_PerCompilationInit(char const*)
	../../gcc-git/gcc/m2/gm2-gcc/init.cc:195
0xb87304 gm2_parse_input_files
	../../gcc-git/gcc/m2/gm2-lang.cc:461
0xb87328 gm2_langhook_parse_file
	../../gcc-git/gcc/m2/gm2-lang.cc:468
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.