[bug #54549] Segfault caused by makefile in make version 4.2.1

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?54549>

                 Summary: Segfault caused by makefile in make version 4.2.1
                 Project: make
            Submitted by: None
            Submitted on: Tue 21 Aug 2018 10:19:50 PM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.2.1
        Operating System: None
           Fixed Release: None
           Triage Status: None

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Details:

The following makefile causes a segfault in version 4.2.1
it doesnt seem reproducible in 4.1, havent tried for any other versions.


foo: -lcat

# Removing second expansion prevents segfault
.SECONDEXPANSION:
foo: address@hidden;

# Having an empty command here prevents segfault unless,
# the environment is empty. `env -i make foo`
# MFLAGS=-w or MAKEFLAGS=-w `env MFLAGS=-w make foo`
# libcat.a target calls an extra command, address@hidden \n @touch 
address@hidden
# odd.
%.o:
        @true

# Having an empty command prevents segfault.
-l%: lib%.a
        @true

# Not creating libcat.a here prevents segfault,
libcat.a:
        @touch $@







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