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D: fix UBSAN

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Fixes:
gcc/d/expr.cc:2596:9: runtime error: null pointer passed as argument 2, which is declared to never be null

gcc/d/ChangeLog:

	* expr.cc: Call memcpy only when length != 0.
This commit is contained in:
Martin Liska 2021-12-06 13:02:22 +01:00
parent af93386ffc
commit 5791bf7a0a
1 changed files with 2 additions and 1 deletions
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3
gcc/d/expr.cc
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@ -2598,7 +2598,8 @@ public:
/* Copy the string contents to a null terminated string. */ /* Copy the string contents to a null terminated string. */
dinteger_t length = (e->len * e->sz); dinteger_t length = (e->len * e->sz);
char *string = XALLOCAVEC (char, length + 1); char *string = XALLOCAVEC (char, length + 1);
memcpy (string, e->string, length); if (length > 0)
memcpy (string, e->string, length);
string[length] = '\0'; string[length] = '\0';
/* String value and type includes the null terminator. */ /* String value and type includes the null terminator. */