--- src/stream.d.orig	2024-12-28 00:47:59.000000000 -0700
+++ src/stream.d	2025-02-07 11:47:28.448086694 -0700
@@ -4239,6 +4239,9 @@ global uintL iconv_wcslen (object encodi
                   != (size_t)(-1)) {
                 inptr += sizeof(chart); insize -= sizeof(chart);
               } else {
+                var int saved_errno = errno;
+                iconv_close(cd);
+                errno = saved_errno;
                 if (errno != EILSEQ) {
                   ANSIC_error();
                 } else {
@@ -4247,6 +4250,7 @@ global uintL iconv_wcslen (object encodi
                 }
               }
             } else {
+              iconv_close(cd);
               end_system_call();
               error_unencodable(encoding,*(const chart*)inptr);
             }
@@ -4317,6 +4321,9 @@ global void iconv_wcstombs (object encod
               if (iconv(cd,&inptr1,&insize1,&outptr,&outsize) != (size_t)(-1)) {
                 inptr += sizeof(chart); insize -= sizeof(chart);
               } else {
+                var int saved_errno = errno;
+                iconv_close(cd);
+                errno = saved_errno;
                 if (errno != EILSEQ) {
                   ANSIC_error();
                 } else {
@@ -4325,6 +4332,7 @@ global void iconv_wcstombs (object encod
                 }
               }
             } else {
+              iconv_close(cd);
               end_system_call();
               error_unencodable(encoding,*(const chart*)inptr);
             }