frawk: fix build (#460908)

From ad649637b9a1c8ac1fdae72bdc3ccd12f04b5800 Mon Sep 17 00:00:00 2001

From: Gert Hulselmans <gert.hulselmans@kuleuven.be>

Date: Fri, 29 Aug 2025 23:49:53 +0200

Subject: [PATCH] Fix some compiler warnings/errors.

  - error: implicit autoref creates a reference to the dereference of a raw pointer

  - unsafe precondition(s) violated: slice::get_unchecked_mut requires that the index is within the slice

---

 src/interp.rs                 | 2 +-

 src/runtime/splitter/batch.rs | 4 ++--

 src/runtime/str_impl.rs       | 3 ++-

 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/interp.rs b/src/interp.rs

index 587afbab83c3440e0364ee33dd89afd6a1b9e1d2..7b88ce32e9eedab648cc3eae8f6f98721d2cc976 100644

--- a/src/interp.rs

+++ b/src/interp.rs

@@ -653,7 +653,7 @@ impl<'a, LR: LineReader> Interp<'a, LR> {

             cur = loop {

                 debug_assert!(cur < unsafe { (*instrs).len() });

                 use Variable::*;

-                match unsafe { (*instrs).get_unchecked(cur) } {

+                match unsafe { (&(*instrs)).get_unchecked(cur) } {

                     StoreConstStr(sr, s) => {

                         let sr = *sr;

                         *self.get_mut(sr) = s.clone_str()

diff --git a/src/runtime/splitter/batch.rs b/src/runtime/splitter/batch.rs

index cc8d05e44b49c6a0a0e930c527e35bd6773ba120..1d4c53dcb4ceca6bc6739ce5c226777b6f6a1e34 100644

--- a/src/runtime/splitter/batch.rs

+++ b/src/runtime/splitter/batch.rs

@@ -1128,8 +1128,8 @@ mod generic {

         let len = buf.len();

         let len_minus_64 = len.saturating_sub(V::INPUT_SIZE);

         let mut ix = 0;

-        let field_base_ptr: *mut u64 = field_offsets.fields.get_unchecked_mut(0);

-        let newline_base_ptr: *mut u64 = newline_offsets.fields.get_unchecked_mut(0);

+        let field_base_ptr: *mut u64 = field_offsets.fields.as_mut_ptr();

+        let newline_base_ptr: *mut u64 = newline_offsets.fields.as_mut_ptr();

         let mut field_base = 0;

         let mut newline_base = 0;

diff --git a/src/runtime/str_impl.rs b/src/runtime/str_impl.rs

index e34176f86b7d0c4ba77f2107d3ebe571f207fbbd..4f8fbca5ac56b94765efdb3e03edfb0e82370e05 100644

--- a/src/runtime/str_impl.rs

+++ b/src/runtime/str_impl.rs

@@ -727,7 +727,8 @@ impl<'a> Str<'a> {

         );

         let new_len = to - from;

         if new_len <= MAX_INLINE_SIZE {

-            return Str::from_rep(Inline::from_unchecked(&(*self.get_bytes())[from..to]).into());

+            let bytes: &[u8] = &*self.get_bytes();

+            return Str::from_rep(Inline::from_unchecked(&bytes[from..to]).into());

         }

         let tag = self.rep().get_tag();

         let u32_max = u32::max_value() as usize;

  cargoHash = "sha256-VraFR3Mp4mPh+39hw88R0q1p5iNkcQzvhRVNPwSxzU0=";

  patches = [

    # This patch comes from https://github.com/ezrosent/frawk/pull/120, which was squash-merged.

    ./fix-some-compiler-warnings-errors.patch

  ];

  buildInputs = [

    libxml2

    ncurses