+mhshow -nopause $msgnum > "$actual" 2>&1
+check "$expected" "$actual"
+
+# check m_getfld() handling of empty header field
+printf 'Date: Sat, 12 Jan 2013 09:07:01 -0600\nReceived:' >"$MH_TEST_DIR/mess"
+cat >"$expected" <<EOF
+ 1 01/12
+EOF
+cat >"$expected_err" <<EOF
+scan: eof encountered in field "Received"
+??Format error (message -1) in component 2
+EOF
+
+scan -width 13 -file "$MH_TEST_DIR/mess" >"$actual" 2>"$actual_err"
+check "$expected" "$actual"
+check "$expected_err" "$actual_err"
+rm -f "$MH_TEST_DIR/mess"
+
+# check m_getfld() handling of excessively long header field name
+cat >"$expected" <<EOF
+ 1 01/15
+EOF
+cat >"$expected_err" <<EOF
+scan: field name "ThisHeaderFieldNameIsWaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaayTooLong" exceeds 997 bytes
+??Format error (message -1) in component 2
+EOF
+
+scan -width 13 -file "$thisdir"/malformed_message.txt >"$actual" 2>"$actual_err"
+check "$expected" "$actual"
+check "$expected_err" "$actual_err"
+