fpm install segfaults on current Archlinux with GFortran 15.1.1

[krystophny]

Description

Starting an install from scratch on a current Archlinux with GFortran 15.1.1 on x86_64 succeeds only up to the end of install.sh. The bootstrapped version then fails on fpm install when trying to install itself again.

$ fpm install

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  0x7fe5d004deef in ???
#1  0x7fe5d00b6d84 in ???
#2  0x4aab8b in install_info
	at ./src/fpm/cmd/install.f90:110
#3  0x4abe66 in __fpm_cmd_install_MOD_cmd_install
	at ./src/fpm/cmd/install.f90:49
#4  0x402f7c in MAIN__
	at app/main.f90:84
#5  0x40250c in main
	at app/main.f90:13
Segmentation fault (core dumped)

Expected Behaviour

The full fpm version should be installed without error via the version bootsrapped from install.sh.

Version of fpm

6908108

Platform and Architecture

Archlinux / x86_64 / GFortran 15.1

Additional Information

No response

[krystophny]

The problem is how the automatic reallocation when extending a size = 0 array

    install_target = [install_target, (string_t(libs(ii)%ptr%output_file),ii=1,size(libs))]

is handled, probably by the new compiler version. I don't know if this is an upstream bug in GFortran, however it is easy to work around by pre-allocating install_target and filling it later in loops. I will open a PR.

[krystophny]

Bug is fixed, see example triggering upstream compiler bug on https://gist.github.com/krystophny/b1e1785249eacc188aa2851ed6fbe471 . In addition, I added a workaround for failing compilation on -Wall due to an upstream GCC bug that has been fixed in git but exists up to including 15.1 . See https://gist.github.com/krystophny/71e7757096553492ca272425886e7182 .