Check for no match in version check

Author: theotherjimmy

tools/toolchains/arm.py

@@ -105,7 +105,7 @@ def version_check(self):
             msg = ("Compiler version mismatch: Have {}; "
                    "expected version >= {} and < {}"
                    .format(found_version, min_ver, max_ver))
-        elif len(match.groups()) != 1:
+        elif not match or len(match.groups()) != 1:
             msg = ("Compiler version mismatch: Could not detect version; "
                    "expected version >= {} and < {}"
                    .format(min_ver, max_ver))

tools/toolchains/gcc.py

@@ -122,7 +122,7 @@ def version_check(self):
             msg = ("Compiler version mismatch: Have {}; "
                    "expected version >= {} and < {}"
                    .format(found_version, min_ver, max_ver))
-        elif len(match.groups()) != 1:
+        elif not match or len(match.groups()) != 1:
             msg = ("Compiler version mismatch: Could not detect version; "
                    "expected version >= {} and < {}"
                    .format(min_ver, max_ver))

tools/toolchains/iar.py

@@ -103,7 +103,7 @@ def version_check(self):
         if found_version and LooseVersion(found_version) != self.IAR_VERSION:
             msg = "Compiler version mismatch: Have {}; expected {}".format(
                 found_version, self.IAR_VERSION)
-        elif len(match.groups()) != 1:
+        elif not match or len(match.groups()) != 1:
             msg = ("Compiler version mismatch: Could Not detect compiler "
                    "version; expected {}".format(self.IAR_VERSION))
         if msg: