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-rw-r--r--generic/tclStringObj.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 560c169..e51b98a 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -1939,11 +1939,6 @@ Tcl_AppendFormatToObj(
}
case 'u':
- if (useBig) {
- msg = "unsigned bignum format is invalid";
- errCode = "BADUNSIGNED";
- goto errorMsg;
- }
case 'd':
case 'o':
case 'p':
@@ -1967,6 +1962,15 @@ Tcl_AppendFormatToObj(
goto error;
}
isNegative = (mp_cmp_d(&big, 0) == MP_LT);
+ if (ch == 'u') {
+ if (isNegative) {
+ msg = "unsigned bignum format is invalid";
+ errCode = "BADUNSIGNED";
+ goto errorMsg;
+ } else {
+ ch = 'd';
+ }
+ }
#ifndef TCL_WIDE_INT_IS_LONG
} else if (useWide) {
if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) {