Merge pull request The-OpenROAD-Project#9787 from suhr25/fix/pdn-add-sroute-connect-missing-guards

pdn: add missing guards for -layers and -cut_pitch in add_sroute_connect

Author: gadfort

src/pdn/src/pdn.tcl

@@ -670,6 +670,19 @@ proc add_sroute_connect { args } {
       -metalspaces -ongrid -insts} \
     flags {}
 
+  if { ![info exists keys(-layers)] } {
+    utl::error PDN 1193 "The -layers argument is required."
+  }
+  if { [llength $keys(-layers)] != 2 } {
+    utl::error PDN 1195 "The -layers argument must be a list of 2 layers."
+  }
+  if { ![info exists keys(-cut_pitch)] } {
+    utl::error PDN 1194 "The -cut_pitch argument is required."
+  }
+  if { [llength $keys(-cut_pitch)] != 2 } {
+    utl::error PDN 1196 "The -cut_pitch argument must be a list of 2 pitch values."
+  }
+
   set l0 [pdn::get_layer [lindex $keys(-layers) 0]]
   set l1 [pdn::get_layer [lindex $keys(-layers) 1]]