`Use --cc:vcc --passC:"/analyze", there are some warnings, is these potential bugs? Debug build: nim-1.6.2\lib\system\io.nim(825) : warning C6031: Return value ignored: '_setmode'. nim-1.6.2\lib\system\io.nim(826) : warning C6031: Return value ignored: '_setmode'. nim-1.6.2\lib\system\io.nim(827) : warning C6031: Return value ignored: '_setmode'. nim-1.6.2\lib\system\strs_v2.nim(40) : warning C6326: Potential comparison of a constant with another constant. nim-1.6.2\lib\system\strs_v2.nim(54) : warning C28182: Dereferencing NULL pointer. 'oldP' contains the same NULL value as '*s.p' did. : Lines: 42, 43, 44, 26, 27, 45, 28, 50, 51, 52, 54 nim-1.6.2\lib\system\strs_v2.nim(134) : warning C6011: Dereferencing NULL pointer '*s.p'. : Lines: 129, 132, 26, 27, 28, 133, 135, 134 Release build: x86\release\stdlib_io.nim.c(303) : warning C6031: Return value ignored: '_setmode'. x86\release\stdlib_io.nim.c(306) : warning C6031: Return value ignored: '_setmode'. x86\release\stdlib_io.nim.c(309) : warning C6031: Return value ignored: '_setmode'. x86\release\stdlib_system.nim.c(1065) : warning C28182: Dereferencing NULL pointer. 'oldP' contains the same NULL value as '*s.p' did. : Lines: 1046, 1047, 1049, 1050, 1051, 1052, 1053, 1054, 1056, 1057, 1058, 1059, 1060, 1061, 1062, 1064, 1065 x86\release\stdlib_system.nim.c(1136) : warning C6011: Dereferencing NULL pointer '*s.p'. : Lines: 1114, 1117, 1120, 1121, 1122, 1123, 1124, 1125, 1126, 1127, 1129, 1130, 1131, 1132, 1133, 1135, 1136 `
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