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-rw-r--r--generic/regc_cvec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/generic/regc_cvec.c b/generic/regc_cvec.c
index 0247521..d450d3e 100644
--- a/generic/regc_cvec.c
+++ b/generic/regc_cvec.c
@@ -81,6 +81,7 @@ addchr(
struct cvec *cv, /* character vector */
pchr c) /* character to add */
{
+ assert(cv->nchrs < cv->chrspace);
cv->chrs[cv->nchrs++] = (chr)c;
}