https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69043
Bug ID: 69043 Summary: Trying to include a directory causes an infinite loop Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: jim.macarthur at codethink dot co.uk Target Milestone: --- Created attachment 37128 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37128&action=edit Reproduction test case. Trying to include a directory, for example: include '.' include '/' ...causes the scanner to go into an infinite loop. Also reproduced on 4.8. I have a fix for this which I'll send to the mailing list in due course. Command line: gccinstall/bin/gfortran -Wall -Wextra ~/vanilla-gcc/gcc/gcc/testsuite/gfortran.dg/include_9.f Output: None (goes into infinite loop immediately) gfortran -v: Using built-in specs. COLLECT_GCC=gccinstall/bin/gfortran COLLECT_LTO_WRAPPER=/home/jimmacarthur/vanilla-gcc/gccinstall/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc/configure --prefix=/home/jimmacarthur/vanilla-gcc/gccinstall --enable-languages=fortran : (reconfigured) ../gcc/configure --prefix=/home/jimmacarthur/vanilla-gcc/gccinstall --enable-languages=fortran : (reconfigured) ../gcc/configure --prefix=/home/jimmacarthur/vanilla-gcc/gccinstall --enable-languages=fortran Thread model: posix gcc version 6.0.0 20151224 (experimental) (GCC)