diff --git a/library/ColorText.cpp b/library/ColorText.cpp
index 5d6e1d82a..2811a7117 100644
--- a/library/ColorText.cpp
+++ b/library/ColorText.cpp
@@ -125,7 +125,7 @@ void color_ostream::vprinterr(const char *format, va_list args)
     color_value save = cur_color;
 
     if (log_errors_to_stderr)
-        fprintf(stderr, format, args);
+        vfprintf(stderr, format, args);
 
     color(COLOR_LIGHTRED);
     vprint(format, args);
diff --git a/package/linux/dfhack b/package/linux/dfhack
index 3e5a0d803..3f624c2ae 100755
--- a/package/linux/dfhack
+++ b/package/linux/dfhack
@@ -41,6 +41,7 @@ case "$1" in
   -g | --gdb)
     shift
     echo "set environment LD_PRELOAD=./hack/libdfhack.so" > gdbcmd.tmp
+    echo "set environment MALLOC_PERTURB_=45" >> gdbcmd.tmp
     gdb $DF_GDB_OPTS -x gdbcmd.tmp ./libs/Dwarf_Fortress $*
     rm gdbcmd.tmp
     ret=$?
diff --git a/plugins/workflow.cpp b/plugins/workflow.cpp
index 532665c7d..e408df509 100644
--- a/plugins/workflow.cpp
+++ b/plugins/workflow.cpp
@@ -500,7 +500,7 @@ static bool recover_job(color_ostream &out, ProtectedJob *pj)
     pj->holder = df::building::find(pj->building_id);
     if (!pj->holder)
     {
-        out.printerr("Forgetting job %d (%s): holder building lost.",
+        out.printerr("Forgetting job %d (%s): holder building lost.\n",
                         pj->id, ENUM_KEY_STR(job_type, pj->job_copy->job_type).c_str());
         forget_job(out, pj);
         return true;
@@ -509,7 +509,7 @@ static bool recover_job(color_ostream &out, ProtectedJob *pj)
     // Check its state and postpone or cancel if invalid
     if (pj->holder->jobs.size() >= 10)
     {
-        out.printerr("Forgetting job %d (%s): holder building has too many jobs.",
+        out.printerr("Forgetting job %d (%s): holder building has too many jobs.\n",
                         pj->id, ENUM_KEY_STR(job_type, pj->job_copy->job_type).c_str());
         forget_job(out, pj);
         return true;
@@ -532,7 +532,7 @@ static bool recover_job(color_ostream &out, ProtectedJob *pj)
     {
         deleteJobStruct(recovered);
 
-        out.printerr("Inconsistency: job %d (%s) already in list.",
+        out.printerr("Inconsistency: job %d (%s) already in list.\n",
                         pj->id, ENUM_KEY_STR(job_type, pj->job_copy->job_type).c_str());
         return true;
     }