1. NetworkManager-1.14.0/shared/nm-utils/nm-shared-utils.c:1242: value_overwrite: Overwriting previous write to "ch" with value from "v".
 2. NetworkManager-1.14.0/shared/nm-utils/nm-shared-utils.c:1239: assigned_value: Assigning value from "++str[0]" to "ch" here, but that stored value is overwritten before it can be used.
 #  1237|   				if (ch >= '0' && ch <= '7') {
 #  1238|   					v = v * 8 + (ch - '0');
 #  1239|-> 					ch = (++str)[0];
 #  1240|   				}
 #  1241|   			}

Don't assign ch when it is going to be overwritten.